ENGINEERING DATA

47

TABLE 3

PRECISION CLASS ABEC-1 — Inch

Inner Ring Unit .0001\"

Vdp

d diameter series

mm ∆dmp 7,8,9 0,1 2,3,4 Vdmp Kia ∆Bs VBs

over incl. high low max max max max max high low max

0.6 2.5 0 -3 4 3 2.5 2.5 4 0 -16 4.5

2.5 10 0 -3 4 3 2.5 2.5 4 0 -47 6

10 18 0 -3 4 3 2.5 2.5 4 0 -47 8

18 30 0 -4 5 4 3 3 5 0 -47 8

30 50 0 -4.5 6 4.5 3.5 3.5 6 0 -47 8

50 80 0 -6 7.5 7.5 4.5 4.5 8 0 -59 10

80 120 0 -8 10 10 6 6 10 0 -79 10

120 180 0 -10 12 12 7.5 7.5 12 0 -98 12

180 250 0 -12 15 15 9 9 16 0 -118 12

250 315 0 -14 17 17 10 10 20 0 -138 14

315 400 0 -16 20 20 12 12 24 0 -157 16

400 500 0 -18 22 22 13 13 26 0 -177 20

Outer Ring Unit .0001\"

VDp

Open Bearings Capped

D diameter series Bearings

mm ∆Dmp 7,8,9 0,1 2,3,4 2,3,4 VDmp Kea ∆Cs VCs

over incl. high low max max max max max max high low max

2.5 6 0 -3 4 3 2.5 4 2.5 6

6 18 0 -3 4 3 2.5 4 2.5 6

18 30 0 -3.5 4.5 3.5 3 4.5 3 6

30 50 0 -4.5 5.5 4.5 3 6.5 3 8

50 80 0 -5 6.5 5 4 8 4 10

80 120 0 -6 7.5 7.5 4.5 10 4.5 14

120 150 0 -7 9 9 5.5 12 5.5 16

150 180 0 -10 12 12 7.5 15 7.5 18

180 250 0 -12 15 15 9 – 9 20

250 315 0 -14 17 17 10 – 10 24

315 400 0 -16 20 20 12 – 12 28

400 500 0 -18 22 22 13 – 13 31

Identical to ∆Bs and

VBs of inner ring of

the same bearing

TOLERANCES OF RADIAL BALL BEARINGS

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 47

ENGINEERING DATA

48

TABLE 4

PRECISION CLASS ABEC-3 — Metric

Inner Ring unit um (.001 mm)

Vdp

d diameter series

mm ∆dmp 7,8,9 0,1 2,3,4 Vdmp Kia ∆Bs VBs

over incl. high low max max max max max high low max

0.6 2.5 0 -7 9 7 5 5 5 0 -40 12

2.5 10 0 -7 9 7 5 5 6 0 -120 15

10 18 0 -7 9 7 5 5 7 0 -120 20

18 30 0 -8 10 8 6 6 8 0 -120 20

30 50 0 -10 13 10 8 8 10 0 -120 20

50 80 0 -12 15 15 9 9 10 0 - 150 25

80 120 0 -15 19 19 11 11 13 0 -200 25

120 180 0 -18 23 23 14 14 18 0 -250 30

180 250 0 -22 28 28 17 17 20 0 -300 30

250 315 0 -25 31 31 19 19 25 0 -350 35

315 400 0 -30 38 38 23 23 30 0 -400 40

400 500 0 -35 44 44 26 26 35 0 -450 45

Outer Ring unit um (.001 mm)

VDp

Open Bearings Capped

D diameter series Bearings

mm ∆Dmp 7,8,9 0,1 2,3,4 0,1,2,3,4 VDmp Kea ∆Cs VCs

over incl. high low max max max max max max high low max

2.5 6 0 -7 9 7 5 9 5 8

6 18 0 -7 9 7 5 9 5 8

18 30 0 -8 10 8 6 10 6 9

30 50 0 -9 11 9 7 13 7 10

50 80 0 -11 14 11 8 16 8 13

80 120 0 -13 16 16 10 20 10 18

120 150 0 -15 19 19 11 25 11 20

150 180 0 -18 23 23 14 30 14 23

180 250 0 -20 25 25 15 – 15 25

250 315 0 -25 31 31 19 – 19 30

315 400 0 -28 35 35 21 – 21 35

400 500 0 -33 41 41 25 – 25 40

Identical to ∆Bs and

VBs of inner ring of

the same bearing

TOLERANCES OF RADIAL BALL BEARINGS

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 48

ENGINEERING DATA

49

TABLE 5

PRECISION CLASS ABEC-3 — Inch

Inner Ring Unit .0001\"

Vdp

d diameter series

mm ∆dmp 7,8,9 0,1 2,3,4 Vdmp Kia ∆Bs VBs

over incl. high low max max max max max high low max

0.6 2.5 0 -3 3.5 3 2 2 2 0 -16 4.5

2.5 10 0 -3 3.5 3 2 2 2.5 0 -47 6

10 18 0 -3 3.5 3 2 2 3 0 -47 8

18 30 0 -3 4 3 2.5 2.5 3 0 -47 8

30 50 0 -4 5 4 3 3 4 0 -47 8

50 80 0 -4.5 6 6 3.5 3.5 4 0 -59 10

80 120 0 -6 7.5 7.5 4.5 4.5 5 0 -79 10

120 180 0 -7 9 9 5.5 5.5 7 0 -98 12

180 250 0 -8.5 11 11 6.5 6.5 8 0 -118 12

250 315 0 -10 12 12 7.5 7.5 10 0 -138 14

315 400 0 -12 15 15 9 9 12 0 -157 16

400 500 0 -14 17 17 10 10 14 0 -177 18

Outer Ring Unit .0001\"

VDp

Open Bearings Capped

D diameter series Bearings

mm ∆Dmp 7,8,9 0,1 2,3,4 0,1,2,3,4 VDmp Kea ∆Cs VCs

over incl. high low max max max max max max high low max

2.5 6 0 -3 3.5 3 2 3.5 2 3

6 18 0 -3 3.5 3 2 3.5 2 3

18 30 0 -3 4 3 2.5 4 2.5 3.5

30 50 0 -3.5 4.5 3.5 3 5 3 4

50 80 0 -4.5 5.5 4.5 3 6.5 3 5

80 120 0 -5 6.5 6.5 4 8 4 7

120 150 0 -6 7.5 7.5 4.5 10 4.5 8

150 180 0 -7 9 9 5.5 12 5.5 9

180 250 0 -8 10 10 6 6 10

250 315 0 -10 12 12 7.5 7.5 12

315 400 0 -11 14 14 8.5 8.5 14

400 500 0 -13 16 16 10 10 16

Identical to ∆Bs and

VBs of inner ring of

the same bearing

TOLERANCES OF RADIAL BALL BEARINGS

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 49

ENGINEERING DATA

50

d Vdp

diameter series

mm ∆dmp 7,8,9 0,1,2,3,4 Vdmp Kia Sd Sia ∆Bs VBs

over incl. high low max max max max max max high low max

0.6 2.5 0 -5 5 4 3 4 7 7 0 -40 5

2.5 10 0 -5 5 4 3 4 7 7 0 -40 5

10 18 0 -5 5 4 3 4 7 7 0 -80 5

18 30 0 -6 6 5 3 4 8 8 0 -120 5

30 50 0 -8 8 6 4 5 8 8 0 -120 5

50 80 0 -9 9 7 5 5 8 8 0 -150 6

80 120 0 -10 10 8 5 6 9 9 0 -200 7

120 180 0 -13 13 10 7 8 10 10 0 -250 8

180 250 0 -15 15 12 8 10 11 13 0 -300 10

250 315 0 -18 18 14 9 13 13 15 0 -350 13

315 400 0 -23 23 18 12 15 15 20 0 -400 15

TABLE 6

PRECISION CLASS ABEC-5 — Metric

Inner Ring Unit um (.001 mm)

Outer Ring Unit um (.001 mm)

VDp

D diameter series

mm ∆Dmp 7,8,9 0,1,2,3,4 VDmp Kea SD Sea ∆Cs VCs

over incl. high low max max max max max max high low max

2.5 6 0 -5 5 4 3 5 8 8 5

6 18 0 -5 5 4 3 5 8 8 5

18 30 0 -6 6 5 3 6 8 8 5

30 50 0 -7 7 5 4 7 8 8 5

50 80 0 -9 9 7 5 8 8 10 6

80 120 0 -10 10 8 5 10 9 11 8

120 150 0 -11 11 8 6 11 10 13 8

150 180 0 -13 13 10 7 13 10 14 8

180 250 0 -15 15 11 8 15 11 15 10

250 315 0 -18 18 14 9 18 13 18 11

315 400 0 -20 20 15 10 20 13 20 13

400 500 0 -23 23 17 12 23 15 23 15

Identical to ∆Bs

of inner ring of

the same bearing

TOLERANCES OF RADIAL BALL BEARINGS

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 50

ENGINEERING DATA

51

d Vdp

diameter series

mm ∆dmp 7,8,9 0,1,2,3,4 Vdmp Kia Sd Sia ∆Bs VBs

over incl. high low max max max max max max high low max

0.6 2.5 0 -2 2 1.5 1 1.5 3 3 0 -16 2

2.5 10 0 -2 2 1.5 1 1.5 3 3 0 -16 2

10 18 0 -2 2 1.5 1 1.5 3 3 0 -31 2

18 30 0 -2.5 2.5 2 1 1.5 3 3 0 -47 2

30 50 0 -3 3 2.5 1.5 2 3 3 0 -47 2

50 80 0 -3.5 3.5 3 2 2 3 3 0 -59 2.5

80 120 0 -4 4 3 2 2.5 3.5 3.5 0 -79 3

120 180 0 -5 5 4 3 3 4 4 0 -98 3

180 250 0 -6 6 4.5 3 4 4.5 5 0 -118 4

250 315 0 -7 7 5.5 3.5 5 5 6 0 -138 5

315 400 0 -9 9 7 4.5 6 6 8 0 -157 6

TABLE 7

PRECISION CLASS ABEC-5 — Inch

Inner Ring Unit .0001\"

Outer Ring Unit .0001\"

VDp

D diameter series

mm ∆Dmp 7,8,9 0,1,2,3,4 VDmp Kea SD Sea ∆Cs VCs

over incl. high low max max max max max max high low max

2.5 6 0 -2 2 1.5 1 2 3 3 2

6 18 0 -2 2 1.5 1 2 3 3 2

18 30 0 -2.5 2.5 2 1 2.5 3 3 2

30 50 0 -3 3 2 1.5 3 3 3 2

50 80 0 -3.5 3.5 3 2 3 3 4 2.5

80 120 0 -4 4 3 2 4 3.5 4.5 3

120 150 0 -4.5 4.5 3 2.5 4.5 4 5 3

150 180 0 -5 5 4 3 5 4 5.5 3

180 250 0 -6 6 4.5 3 6 4.5 6 4

250 315 0 -7 7 5.5 3.5 7 5 7 4.5

315 400 0 -8 8 6 4 8 5 8 5

400 500 0 -9 9 6.5 4.5 9 6 9 6

Identical to ∆Bs

of inner ring of

the same bearing

TOLERANCES OF RADIAL BALL BEARINGS

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 51

ENGINEERING DATA

INTERNAL RADIAL CLEARANCE

Internal clearance between balls and raceways in ball bearings

permits interference fits on the bearing rings without causing

radial preload, allows unequal thermal expansion of inner and

outer rings to occur without unduly affecting bearing operation,

and accommodates slight misalignment of the bearing mounting.

Proper internal clearance is particularly important for bearings

operating at high speeds.

Radial clearance may be defined as the average diameter of the

outer ring raceway, minus the average diameter of the inner ring

raceway, minus twice the ball diameter. Generally, radial

clearance is measured on assembled bearings by displacing the

outer ring radially with respect to the inner ring under a reversing

light gauge load.

52

d

mm C2 C0 (Normal) C3 C4

over incl. min. max. min. max. min. max. min. max

2.5 6 0 7 2 13 8 23 – –

6 10 0 7 2 13 8 23 14 29

10 18 0 9 3 18 11 25 18 33

18 24 0 10 5 20 13 28 20 36

24 30 1 11 5 20 13 28 23 41

30 40 1 11 6 20 15 33 28 46

40 50 1 11 6 23 18 36 30 51

50 65 1 15 8 28 23 43 38 61

65 80 1 15 10 30 25 51 46 71

80 100 1 18 12 36 30 58 53 84

100 120 2 20 15 41 36 66 61 97

120 140 2 23 18 48 41 81 71 114

140 160 2 23 18 53 46 91 81 130

160 180 2 25 20 61 53 102 91 147

180 200 2 30 25 71 63 117 107 163

TABLE 8

RADIAL INTERNAL CLEARANCE VALUES FOR SINGLE ROW RADIAL DEEP GROOVE BALL BEARINGS

Clearance values in um (.001 mm)

d

mm C2 C0 (Normal) C3 C4

over incl. min. max. min. max. min. max. min. max

2.5 6 0 3 1 5 3 9 – –

6 100 3 1 5 3 9 611

10 18 0 3.5 1 7 5 10 7 13

18 24 0 4 2 8 5 11 8 14

24 30 0.5 4.5 2 8 5 11 9 16

30 40 0.5 4.5 2.5 8 6 13 11 18

40 50 0.5 4.5 2.5 9 7 14 12 20

50 65 0.5 6 3 11 9 17 15 24

65 80 0.5 6 4 12 10 20 18 28

80 100 0.5 7 4.5 14 12 23 21 33

100 120 1 8 6 16 14 26 24 38

120 140 1 9 7 19 16 32 28 45

140 160 1 9 7 21 18 36 32 51

160 180 1 10 8 24 21 40 36 58

180 200 1 12 10 28 25 46 42 64

Clearance values in .0001 inch

Radial Internal Clearance =

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 52

ENGINEERING DATA

53

AXIAL INTERNAL CLEARANCE VALUES FOR DOUBLE ROW

ANGULAR CONTACT BALL BEARINGS

d

mm C2 C0 (Normal) C3 C4

over incl. min. max. min. max. min. max. min. max

6 10 1 11 5 21 12 28 25 45

10 18 1 12 6 23 13 31 27 47

18 24 2 14 7 25 16 34 28 48

24 30 2 15 8 27 18 37 30 50

30 40 2 16 9 29 21 40 33 54

40 50 2 18 11 33 23 44 36 58

50 65 3 22 13 36 26 48 40 63

65 80 3 24 15 40 30 54 46 71

80 100 3 26 18 46 35 63 55 83

100 120 4 30 22 53 42 73 65 96

120 140 4 34 25 59 48 82 74 108

Clearance values in um (.001 mm)

d

mm C2 C0 (Normal) C3 C4

over incl. min. max. min. max. min. max. min. max

6 10 0 4 2 8 5 11 10 18

10 18 0 5 2 9 5 12 11 19

18 24 1 6 3 10 6 13 11 19

24 30 1 6 3 11 7 15 12 20

30 40 1 6 4 11 8 16 13 21

40 50 1 7 4 13 9 17 14 23

50 65 1 9 5 14 10 19 16 25

65 80 1 9 6 16 12 21 18 28

80 100 1 10 7 18 14 25 22 33

100 120 2 12 9 21 17 29 26 38

120 140 2 13 10 23 19 32 29 43

Clearance values in .0001 inch

TABLE 9

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 53

ENGINEERING DATA

54

Part I – DESIGN & OPERATING CONDITIONS BALL BEARINGS

TABLE 10

SELECTION OF SHAFT FIT

Rotational

Conditions

Inner Ring

Axial

Displaceability

Radial

Loading

Bore

d

mm

Over Inc. Shaft Fit

h5

j6

18

All

0

18

Inner Ring Rotating Light

(relative to load

direction)

or

Indeterminate

Load

Direction

j5

k5

0

18 Normal 18

All

100

All

18

100 Heavy k5

m5

g6

h6

All Sizes

All Sizes

All Sizes j6

Light

Normal

Heavy

Light

Normal

Heavy

Inner Ring must

be easily axially

displaceable

Inner Ring need not

be easily axially

displaceable

Inner Ring Stationary

(relative to

load direction)

Pure Thrust (Axial) Load

Part II – DESIGN & OPERATING CONDITIONS BALL BEARINGS

TABLE 11

Rotational

Conditions

Inner Ring

Axial

Displaceability

Radial

Loading

Bore

d

inches

Over Inc. Shaft Fit

h5

j6

0.71

All

0

0.71

Inner Ring Rotating Light

(relative to load

direction)

or

Indeterminate

Load

Direction

j5

k5

0

0.71 Normal 0.71

All

3.94

All

0.71

3.94 Heavy k5

m5

g6

h6

All Sizes

All Sizes

All Sizes j6

Light

Normal

Heavy

Light

Normal

Heavy

Inner Ring must

be easily axially

displaceable

Inner Ring need not

be easily axially

displaceable

Inner Ring Stationary

(relative to

load direction)

Pure Thrust (Axial) Load

Metric

Inch

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 54

ENGINEERING DATA

55

TOLERANCE CLASSIFICATIONS

d g6 h6 h5 j5 j6 k5 k6

Shaft Resultant Shaft Resultant Shaft Resultant Shaft Resultant Shaft Resultant Shaft Resultant Shaft Resultant

over incl. Deviation Deviation Fit Deviation Fit Deviation Fit Deviation Fit Deviation Fit Deviation Fit Deviation Fit

3 0 -4 12L 0 8L 0 5L +3 2L +6 2L +6 1T

6 -8 -12 4T -8 8T -5 8T -2 11T -2 14T +1 14T

6 0 -5 14L 0 9L 0 6L +4 2L +7 2L +7 1T

10 -8 -14 3T -9 8T -6 8T -2 12T -2 15T +1 15T

10 0 -6 17L 0 11L 0 8L +5 3L +8 3L +9 1T

18 -8 -17 2T -11 8T -8 8T -3 13T -3 16T +1 17T

18 0 -7 20L 0 13L +5 4L +9 4L +11 2T

30 -10 -20 3T -13 10T -4 15T -4 19T +2 21T

30 0 -9 25L 0 16L +6 5L +11 5L +13 2T +18 2T

50 -12 -25 3T -16 12T -5 18T -5 23T +2 25T +2 30T

50 0 -10 29L 0 19L +6 7L +12 7L +15 2T +21 2T

80 -15 -29 5T -19 15T -7 21T -7 27T +2 30T +2 36T

80 0 -12 34L 0 22L +6 9L +13 9L +18 3T +25 3T

120 -20 -34 8T -22 20T -9 26T -9 33T +3 38T +3 45T

120 0 -14 39L 0 25L +7 11L +14 11L +21 3T +28 3T

180 -25 -39 11T -25 25T -11 32T -11 39T +3 46T +3 53T

180 0 -15 44L 0 29L +7 13L +16 13L +24 4T

200 -30 -44 15T -29 30T -13 37T -13 46T +4 54T

200 0 -15 44L 0 29L +7 13L +16 13L +24 4T

225 -30 -44 15T -29 30T -13 37T -13 46T +4 54T

225 0 -15 44L 0 29L +7 13L +16 13L +24 4T

250 -30 -44 15T -29 30T -13 37T -13 46T +4 54T

250 0 -17 49L 0 32L +7 16L +16 16L +27 4T

280 -35 -49 18T -32 35T -16 42T -16 51T +4 62T

280 0 -17 49L 0 32L +7 16L +16 16L +27 4T

315 -35 -49 18T -32 35T -16 42T -16 51T +4 62T

315 0 -18 54L 0 36L +7 18L +18 18L +29 4T

355 -40 -54 22T -36 40T -18 47T -18 58T +4 69T

355 0 -18 54L 0 36L +7 18L +18 18L +29 4T

400 -40 -54 22T -36 40T -18 47T -18 58T +4 69T

400 0 -20 60L 0 40L +7 20L +20 20L +32 5T

450 -45 -60 25T -40 45T -20 52T -20 65T +5 77T

450 0 -20 60L 0 40L +7 20L +20 20L +32 5T

500 -45 -60 25T -40 45T -20 52T -20 65T +5 77T

TOLERANCE CLASSIFICATIONS

d m5 m6 n6 p6 r6 r7

Shaft Resultant Shaft Resultant Shaft Resultant Shaft Resultant Shaft Resultant Shaft Resultant

over incl. Deviation Deviation Fit Deviation Fit Deviation Fit Deviation Fit Deviation Fit Deviation Fit

3 0 +9 4T

6 -8 +4 17T

6 0 +12 6T

10 -8 +6 20T

10 0 +15 7T

18 -8 +7 23T

18 0 +17 8T

30 -10 +8 27T

30 0 +20 9T +25 9T

50 -12 +9 32T +9 37T

50 0 +24 11T +30 11T +39 20T

80 -15` +11 39T +11 45T +20 54T

80 0 +28 13T +35 13T +45 23T +59 37T

120 -20 +13 48T +13 55T +23 65T +37 79T

120 0 +33 15T +40 15T +52 27T +68 43T +90 65T

180 -25 +15 58T +15 65T +27 77T +43 93T +65 115T

180 0 +37 17T +46 17T +60 31T +79 50T +106 77T

200 -30 +17 67T +17 76T +31 90T +50 109T +77 136T

200 0 +37 17T +46 17T +60 31T +79 50T +109 80T +126 80T

225 -30 +17 67T +17 76T +31 90T +50 109T +80 139T +80 156T

225 0 +37 17T +46 17T +60 31T +79 50T +113 84T +130 84T

250 -30 +17 67T +17 76T +31 90T +50 109T +84 143T +84 160T

250 0 +43 20T +52 20T +66 34T +88 56T +126 94T +146 94T

280 -35 +20 78T +20 87T +34 101T +56 123T +94 161T +94 181T

280 0 +43 20T +52 20T +66 34T +88 56T +130 98T +150 98T

315 -35 +20 78T +20 87T +34 101T +56 123T +98 165T +98 185T

315 0 +46 21T +57 21T +73 37T +98 62T +144 108T +165 108T

355 -40 +21 86T +21 97T +37 113T +62 138T +108 184T +108 205T

355 0 +46 21T +73 37T +98 62T +150 114T +171 114T

400 -40 +21 86T +37 113T +62 138T +114 190T +114 211T

400 0 +50 23T +80 40T +108 68T +166 126T +189 126T

450 -45 +23 95T +40 125T +68 153T +126 211T +126 234T

450 0 +50 23T +80 40T +108 68T +172 132T +195 132T

500 -45 +23 95T +40 125T +68 153T +132 217T +132 240T

Dimensions in Millimeters

Deviations and Fits in um (.001 mm)

Dimensions in Millimeters

Deviations and Fits in um (.001 mm)

TABLE 12 — SHAFT FITS (Metric)

L=loose, T=tight

L=loose, T=tight

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 55

ENGINEERING DATA

56

Dimensions in inches

Deviations and Fits in .0001 inches TABLE 13 — SHAFT FITS (INCH)

L=loose, T=tight

TOLERANCE CLASSIFICATIONS

d g6 h6 h5 j5 j6 k5 k6

Shaft Resultant Shaft Resultant Shaft Resultant Shaft Resultant Shaft Resultant Shaft Resultant Shaft Resultant

over incl. Deviation Deviation Fit Deviation Fit Deviation Fit Deviation Fit Deviation Fit Deviation Fit Deviation Fit

0.1181 0 -2 5L 0 3L 0 2L +1 1L +2 1L +2 0T

0.2362 -3 -5 1T -3 3T -2 3T -1 4T -1 5T 0 5T

0.2362 0 -2 6L 0 4L 0 2L +2 1L +3 1L +3 0T

0.3937 -3 -6 1T -4 3T -2 3T -1 5T -1 6T 0 6T

0.3937 0 -2 7L 0 4L 0 3L +2 1L +3 1L +4 0T

0.7087 -3 -7 1T -4 3T -3 3T -1 5T -1 6T 0 7T

0.7087 0 -3 8L 0 5L +2 2L +4 2L +4 1T

1.1811 -4 -8 1T -5 4T -2 6T -2 8T +1 8T

1.1811 0 -4 10L 0 67L +2 2L +4 2L +5 1T +7 1T

1.9685 -4.5 -10 0.5T -6 4.5T -2 6.5T -2 8.5T +1 9.5T +1 11.5T

1.9685 0 -4 11L 0 7L +2 3L +5 3L +6 1T +8 1T

3.1496 -6 -11 2T -7 6T -3 8T -3 11T +1 12T +1 14T

3.1496 0 -5 13L 0 9L +2 4L +5 4L +7 1T +10 1T

4.7244 -8 -13 3T -9 8T -4 10T -4 13T +1 15T +1 18T

4.7244 0 -6 15L 0 10L +3 4L +6 4L +8 1T +11 1T

7.0866 -10 -15 4T -10 10T -4 13T -4 16T +1 18T +1 21T

7.0866 0 -6 17L 0 11L +3 5L +6 5L +9 2T

7.8740 -12 -17 6T -11 12T -5 15T -5 18T +2 21T

7.8740 0 -6 17L 0 11L +3 5L +6 5L +9 2T

8.8583 -12 -17 6T -11 12T -5 15T -5 18T +2 21T

8.8583 0 -6 17L 0 11L +3 5L +6 5L +9 2T

9.8425 -12 -17 6T -11 12T -5 15T -5 18T +2 21T

9.8425 0 -7 19L 0 13L +3 6L +6 6L +11 2T

11.0236 -14 -19 7T -13 14T -6 17T -6 20T +2 25T

11.0236 0 -7 19L 0 13L +3 6L +6 6L +11 2T

12.4015 -14 -19 7T -13 14T -6 17T -6 20T +2 25T

12.4015 0 -7 21L 0 14L +3 7L +7 7L +11 2T

13.9763 -16 -21 9T -14 16T -7 19T -6 23T +2 27T

13.9763 0 -7 21L 0 14L +3 7L +7 7L +11 2T

15.7480 -16 -21 9T -14 16T -7 19T -7 23T +2 27T

15.7480 0 -8 24L 0 16L +3 8L +8 8L +13 2T

17.7165 -18 -24 10T -16 18T -8 21T -8 26T +2 31T

17.7165 0 -8 24L 0 16L +3 8L +8 8L +13 2T

19.6850 -18 -24 10T -16 18T -8 21T -8 26T +2 31T

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 56

沈阳瑞思达轴承有限公司SHENYANG TOTAL BEARING CO.,LTD.

Tel: 024 22945833 22923833 24853899 Fax: 024 88729249

Mobile: 13940483518 15640413155（微信）

Web: https://www.rstbearing.com.cn

ENGINEERING DATA

57

TOLERANCE CLASSIFICATIONS

d m5 m6 n6 p6 r6 r7

Shaft Resultant Shaft Resultant Shaft Resultant Shaft Resultant Shaft Resultant Shaft Resultant

over incl. Deviation Deviation Fit Deviation Fit Deviation Fit Deviation Fit Deviation Fit Deviation Fit

0.1181 0 +4 2T

0.2362 -3 +2 7T

0.2362 0 +5 2T

0.3937 -3 +2 8T

0.3937 0 +6 3T

0.7087 -3 +3 9T

0.7087 0 +7 3T

1.1811 -4 +3 11T

1.1811 0 +8 4T +10 4T

1.9685 -4.5 +4 12.5T +4 14.5T

1.9685 0 +9 4T +12 4T +15 8T

3.1496 -6 +4 15T +4 18T +8 21T

3.1496 0 +11 5T +14 5T +18 9T +23 15T

4.7244 -8 +5 19T +5 22T +9 26T +15 31T

4.7244 0 +13 6T +16 6T +20 11T +27 17T +35 26T

7.0866 -10 +6 23t +6 26T +11 20T +17 37T +26 45T

7.0866 0 +15 7T +18 7T +24 12T +31 20T +42 30T

7.8740 -12 +7 27T +7 30T +12 36T +20 43T +30 54T

7.8740 0 +15 7T +18 7T +24 12T +31 20T +43 31T +50 31T

8.8583 -12 +7 27T +7 30T +12 36T +20 43T +31 55T +31 62T

8.8583 0 +15 7T +18 7T +24 12T +31 20T +44 33T +51 33T

9.8425 -12 +7 27T +7 30T +12 36T +20 43T +33 56T +33 63T

9.8425 0 +17 8T +20 8T +26 13T +35 22T +50 37T +57 37T

11.0236 -14 +8 31T +8 34T +13 40T +22 49T +37 64T +37 71T

11.0236 0 +17 8T +20 8T +26 13T +35 22T +51 39T +59 39T

12.4015 -14 +8 31T +8 34T +13 40T +22 49T +39 65T +39 73T

12.4015 0 +18 8T +22 8T +29 15T +39 24T +57 43T +65 43T

13.9763 -16 +8 34T +8 38T +15 45T +24 55T +43 73T +43 81T

13.9763 0 +18 8T +29 15T +39 24T +59 45T +67 45T

15.7480 -16 +8 34T +15 45T +24 55T +45 75T +45 83T

15.7480 0 +20 9T +31 16T +43 27T +65 50T +74 50T

17.7165 -18 +9 38T +16 49T +27 61T +50 83T +50 92T

17.7165 0 +20 9T +31 16T +43 27T +68 52T +77 52T

19.6850 -18 +9 38T +16 49T +27 61T +52 86T +52 95T

Dimensions in Inches

Deviations and Fits in .0001 Inches TABLE 13 (Inch continued)

L=loose, T=tight

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 57

DESIGN & OPERATING CONDITIONS

Outer Ring

Rotational Other Axial HOUSING

Conditions Loading Conditions Displaceability FIT

TABLE 14 — SELECTION OF HOUSING FIT

Outer Ring Stationary

(relative to

load direction)

Indeterminate

Load

Direction

Outer Ring Rotating

(relative to

load direction)

Light

Normal

or

Heavy

Shock with

temporary

complete unloading

Light

Normal or Heavy

Heavy shock

Light

Normal or Heavy

Heavy

Heat input

through

shaft

Housing

split

axially

Housing not

split

axially

Split

Housing

not

recommended

Thin wall

housing not

split

Outer ring

easily

axially

displaceable

Transitional

Range

Outer ring not

easily axially

displaceable

G7

H7

H6

J6

K6

M6

N6

P6

ENGINEERING DATA

58

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 58

ENGINEERING DATA

59

PART 1 – TOLERANCE CLASSIFICATIONS

D F7 G7 H8 H7 H6 J6 J7 K6

Housing Resultant Housing Resultant Housing Resultant Housing Resultant Housing Resultant Housing Resultant Housing Resultant Housing Resultant

over incl. Deviation Deviation Fit Deviation Fit Deviation Fit Deviation Fit Deviation Fit Deviation Fit Deviation Fit Deviation Fit

10 18 0 +16 42L +6 32L 0 35L 0 26L 0 19L -5 14L -8 18L -9 10L

-8 +34 16L +24 6L +27 0 +18 0 +11 0 +6 5T +10 8T +2 9T

18 30 0 +20 50L +7 37L 0 42L 0 30L 0 22L -5 17L -9 21L -11 11L

-9 +41 20L +28 7L +33 0 +21 0 +13 0 +8 5T +12 9T +2 11T

30 50 0 +25 61L +9 45L 0 50L 0 36L 0 27L -6 21L -11 25L -13 14L

-11 +50 25L +34 9L +39 0 +25 0 +16 0 +10 6T +14 11T +3 13T

50 80 0 +30 73L +10 53L 0 59L 0 43L 0 32L -6 26L -12 31L -15 17L

-13 +60 30L +40 10L +46 0 +30 0 +19 0 +13 6T +18 12T +4 15T

80 120 0 +36 86L +12 62L 0 69L 0 50L 0 37L -6 31L -13 37L -18 19L

-15 +71 36L +47 12L +54 0 +35 0 +22 0 +16 6T +22 13T +4 18T

120 150 0 +43 101L +14 72L 0 81L 0 58L 0 43L -7 36L -14 44L -21 22L

-18 +83 43L +54 14L +63 0 +40 0 +25 0 +18 7T +26 14T +4 21T

150 180 0 +43 108L +14 79L 0 88L 0 65L 0 50L -7 43L -14 51L -24 29L

-25 +83 43L +54 14L +63 0 +40 0 +25 0 +18 7T +26 14T +4 21T

180 250 0 +50 126L +15 91L 0 102L 0 76L 0 59L -7 52L -16 60L -24 35L

-30 +96 50L +61 15L +72 0 +46 0 +29 0 +22 7T +30 16T +5 24T

250 315 0 +56 143L +17 104L 0 116L 0 87L 0 67L -7 60L -16 71L -27 40L

-35 +108 56L +69 17L +81 0 +52 0 +32 0 +25 7T +36 16T +5 27T

315 400 0 +62 159L +18 115L 0 129L 0 97L 0 76L -7 69L -18 79L -29 47L

-40 +119 62L +75 18L +89 0 +57 0 +36 0 +29 7T +39 18T +7 29T

400 500 0 +68 176L +20 128L 0 142L 0 108L 0 85L -7 78L -20 88L -30 53L

-45 +131 68L +83 20L +97 0 +63 0 +40 0 +33 7T +43 20T +8 32T

Dimensions in Millimeters

Deviations and Fits in um (.001 mm)

TABLE 15 — HOUSING FITS (Metric)

Dimensions in Millimeters

Deviations and Fits in um (.001 mm)

TOLERANCE CLASSIFICATIONS

D K7 M6 M7 N6 N7 P6 P7

Housing Resultant Housing Resultant Housing Resultant Housing Resultant Housing Resultant Housing Resultant Housing Resultant

over incl. Deviation Deviation Fit Deviation Fit Deviation Fit Deviation Fit Deviation Fit Deviation Fit Deviation Fit

10 18 0 -12 14L -15 4L -18 8L -20 1T -23 3L -26 7T -29 3T

-8 +6 12T -4 15T 0 18T -9 20T -5 23T -15 26T -11 29T

18 30 0 -15 15L -17 5L -21 9L -24 2T -28 2L -31 9T -35 5T

-9 +6 15T -4 17T 0 21T -11 24T -7 28T -18 31T -14 35T

30 50 0 -18 18L -20 7L -25 11L -28 1T -33 3L -37 10T -42 6T

-11 +7 18T -4 20T 0 25T -12 28T -8 33T -21 37T -17 42T

50 80 0 -21 22L -24 8L -30 13L -33 1T -39 4L -45 13T -51 8T

-13 +9 21T -5 24T 0 30T -14 33T -9 39T -26 45T -21 51T

80 120 0 -25 25L -28 9L -35 15L -38 1T -45 5L -52 15T -59 9T

-15 +10 25T -6 28T 0 35T -16 38T -10 45T -30 52T -24 59T

120 150 0 -28 30L -33 10L -40 18L -45 2T -52 6L -61 18T -68 10T

-18 +12 28T -8 33T 0 40T -20 45T -12 52T -36 61T -28 68T

150 180 0 -28 37L -33 17L -40 25L -45 5L -52 13L -61 11T -68 3T

-25 +12 28T -8 33T 0 40T -20 45T -12 52T -36 61T -28 68T

180 250 0 -33 43L -37 22L -46 30L -51 8L -60 16L -70 11T -79 3T

-30 +13 33T -8 37T 0 46T -22 51T -14 60T -41 70T -33 79T

250 315 0 -36 51L -41 26L -52 35L -57 10L -66 21L -79 12T -88 1T

-35 +16 36T -9 41T 0 52T -25 57T -14 66T -47 79T -36 88T

315 400 0 -40 57L -46 30L -57 40L -62 14L -73 24L -87 11T -98 1T

-40 +17 40T -10 46T 0 57T -26 62T -16 73T -51 87T -41 98T

400 500 0 -45 63L -50 35L -63 45L -67 18L -80 27L -95 10T -108 0

-45 +18 45T -10 50T 0 63T -27 67T -17 80T -55 95T -45 108T

L=loose, T=tight

L=loose, T=tight

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 59

ENGINEERING DATA

60

PART 2 – TOLERANCE CLASSIFICATIONS

D F7 G7 H8 H7 H6 J6 J7 K6

Housing Resultant Housing Resultant Housing Resultant Housing Resultant Housing Resultant Housing Resultant Housing Resultant Housing Resultant

over incl. Deviation Deviation Fit Deviation Fit Deviation Fit Deviation Fit Deviation Fit Deviation Fit Deviation Fit Deviation Fit

0.3937 0 +6 16L +2 12L 0 14L 0 10L 0 7L -2 5L -3 7L -4 4L

0.7087 -3 +13 6L +9 2L +11 0 +7 0 +4 0 +2 2T +4 3T +1 4T

0.7087 0 +8 19.5L +3 14.5L 0 16.5L 0 11.5L 0 8.5L -2 6.5L -4 8.5L -4 4.5L

1.1811 -3.5 +16 8L +11 3L +13 0 +8 0 +5 0 +3 2T +5 4T +1 4T

1.1811 0 +10 24.5L +4 17.5L 0 19.5L 0 14.5L 0 10.5L -2 8.5L -4 10.5L -5 5.5L

1.9685 -4.5 +20 10L +13 4L +15 0 +10 0 +6 0 +4 2T +6 4T +1 5T

1.9685 0 +12 29L +4 21L 0 23L 0 17L 0 12L -2 10L -5 12L -6 7L

3.1496 -5 +24 12L +16 4L +18 0 +12 0 +7 0 +5 2T +7 5T +2 6T

3.1496 0 +14 34L +5 25L 0 27L 0 20L 0 15L -2 12L -5 15L -7 8L

4.7244 -6 +28 14L +19 5L +21 0 +14 0 +9 0 +6 2T +9 5T +2 7T

4.7244 0 +17 40L +6 28L 0 32L 0 23L 0 17L -3 14L -6 17L -8 9L

5.9055 -7 +33 17L +21 6L +25 0 +16 0 +10 0 +7 3T +10 6T +2 8T

5.9055 0 +17 43L +6 31L 0 35L 0 26L 0 20L -3 17L -6 20L -8 12L

7.0866 -10 +33 17L +21 6L +25 0 +16 0 +10 0 +7 3T +10 6T +2 8T

7.0866 0 +20 50L +6 36L 0 40L 0 30L 0 23L -3 21L -6 24L -9 14L

9.8425 -12 +38 20L +24 6L +28 0 +18 0 +11 0 +9 3T +12 6T +2 9T

9.8425 0 +22 57L +7 41L 0 46L 0 34L 0 27L -3 24L -6 28L -11 16L

12.4016 -14 +43 22L +27 7L +32 0 +20 0 +13 0 +10 3T +14 6T +2 11T

12.4016 0 +24 63L +7 46L 0 51L 0 38L 0 30L -3 27L -7 31L -11 19L

15.7480 -16 +47 24L +30 7L +35 0 +22 0 +14 0 +11 3T +15 7T +2 11T

15.7480 0 +27 70L +8 51L 0 56L 0 43L 0 34L -3 31L -8 35l -13 21L

19.6850 -18 +52 27L +33 8L +38 0 +25 0 +16 0 +13 3T +17 8t +3 13T

Dimensions in Inches

Deviations and Fits in .0001 Inches

TABLE 16 — HOUSING FITS (Inch)

Dimensions in Inches

Deviations and Fits in .0001 Inches

TOLERANCE CLASSIFICATIONS

D K7 M6 M7 N6 N7 P6 P7

Housing Resultant Housing Resultant Housing Resultant Housing Resultant Housing Resultant Housing Resultant Housing Resultant

over incl. Deviation Deviation Fit Deviation Fit Deviation Fit Deviation Fit Deviation Fit Deviation Fit Deviation Fit

0.3937 0 -5 5L -6 1L -7 3L -8 1T -9 1L -10 3T -11 1T

0.7087 -3 +2 5T -2 6T 0 7T -4 9T -2 9T -6 10T -4 11T

0.7087 0 -6 5L -7 1.5L -8 3.5L -9 .05T -11 0.5L -12 3.5T -14 2.5T

1.1811 -3.5 +2 6T -2 7T 0 8T -4 9T -3 11T -7 12T -6 14T

1.1811 0 -7 7.5L -8 2.5L -10 4.5L -11 0.5T -13 1.5L -15 3.5T -17 2.5T

1.9685 -4.5 +3 7T -2 8T 0 10T -5 11T -3 13T -8 15T -7 17T

1.9685 0 -8 9L -9 3L -12 5L -13 1T -15 1L -18 5T -20 3T

3.1496 -5 +4 8T -2 9T 0 12T -6 13T -4 15T -10 18T -28 20T

3.1496 0 -10 10L -11 4L -14 6L -15 0 -18 2L -20 6T -23 3T

4.7244 -6 +4 10T -2 11T 0 14T -6 15T -4 18T -12 20T -9 23T

4.7244 0 -11 12L -13 4L -16 7L -18 1T -20 2L -24 7T -27 4T

5.9055 -7 +5 11T -3 13T 0 16T -8 18T -5 20T -14 24T -11 27T

5.9055 0 -11 15L -13 7L -16 10L -18 2L -20 5L -24 4T -27 1T

7.0866 -10 +5 11T -3 13T 0 16T -8 18T -5 20T -14 24T -11 27T

7.0866 0 -13 17L -15 9L -19 12L -20 3L -24 6L -28 4T -31 1T

9.8425 -12 +5 13T -3 15T 0 18T -9 20T -6 24T -16 28T -13 31T

9.8425 0 -14 20L -16 10L -20 14L -22 4L -26 8L -31 5T -35 0

12.4016 -14 +6 14T -4 16T 0 20T -10 22T -6 26T -19 31T -14 35T

12.4016 0 -16 23L -18 12L -22 16L -24 6L -29 10L -34 4T -39 0

15.7480 -16 +7 16T -4 18T 0 22T -10 24T -6 29T -20 34T -16 39T

15.7480 0 -18 25L -20 14L -25 18L -26 7L -31 11L -37 4T -43 0

19.6850 -18 +7 18T -4 20T 0 25T -11 26T -7 31T -22 37T -18 43T

L=loose, T=tight

L=loose, T=tight

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 60

ENGINEERING DATA

61

LOAD CAPACITY AND LIFE

Choose a PEER bearing to be used for an application on the basis of its load carrying capacity in relation to the

loads to be carried, its operation speed and the requirements regarding life and reliability. A numerical value

termed BASIC LOAD RATING is used in the calculations to express the load carrying capacity. Values for the

dynamic radial load rating (Cr) are shown on the bearing pages.

1) Basic Load Rating

The basic load rating (Cr) is used for calculations involving dynamically stressed bearings, when selecting a

bearing which is to rotate under load. It expresses the bearing radial load which will give a basic rating life of

1,000,000 revolutions (33-1/3 R.P.M. for 500 hours).

2) Life

The life of an individual bearing is defined as the number of revolutions which the bearing is capable of

enduring before fatigue occurs on one of its raceways or balls.

Dynamic load ratings are based on the life that 90% of a group of identical bearings can be expected to reach

or exceed. The majority of PEER bearings attain much longer life than this. The average life is approximately

five times the calculated life rating.

2.1) The Life Calculation under Radial Load

The relationship between the basic rating life, the basic dynamic load rating and the bearing load is expressed

by the equation:

Where

L10 = basic rating life in millions of revolutions

Cr = Basic dynamic radial load rating, Lbf.

P = equivalent dynamic radial bearing load, Lbf.

p = 3 for ball bearings

For bearings operating at constant speed a basic catalog life expressed in operating hours uses the

equation:

Where

L10h = basic life in operating hours

n = rotational speed, rpm.

The basic rating life L10 or L10h should be used when selecting a bearing size.If the load is constant in

magnitude and direction and acts radially on a bearing, then P=Fr and the load may be inserted directly

in the life equation.

= ( )

L10 = ( )

Cr = P = 674

Cr

P

P

L10h = ( ) Cr

P

16,667

n

L10 = ( ) = = 17,000 hours

= 8,200 Lbf.

= 300 Lbf.

Cr

P

16,667

n

16,667

700

16,667

700

3 3

3150

350 (729)

L10h = ( ) = ( ) = Cr

P

16,667

n

16,667

1000

4400

685 4417 hrs

√ √ L10 x n

16,667

P = √ L10 x n

16,667

15,000 x 2,000

16,667

=

√ 10,000 x 1,500

16,667

P = √ (P x n x + (P x n x + … + (P x n x

(n x + (n x + … + ( n x

P = √ (P x + (P x + (P x

Cr 2900

= = √ 900

2900

9.65

2900

= ( )

L10 = ( )

Cr = P = 674

Cr

P

P

L10h = ( ) Cr

P

16,667

n

L10 = ( ) = = 17,000 hours

= 8,200 Lbf.

= 300 Lbf.

Cr

P

16,667

n

16,667

700

16,667

700

3 3

3150

350 (729)

L10h = ( ) = ( ) = Cr

P

16,667

n

16,667

1000

4400

685 4417 hrs

√ √ L10 x n

16,667

P = √ L10 x n

16,667

15,000 x 2,000

16,667

=

√ 10,000 x 1,500

16,667

P

Cr 2900

= = √ 900

2900

9.65

2900

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 61

Example 1: Determining L10h Life:

A 6205 bearing is operating at 700 RPM with a radial load (Fr) of 350 lbf. What is the life (L10)?

From page 10 we know that a 6205 bearing has a dynamic load rating (Cr) of 3150 lbf.

Therefore:

Example 2: Selecting a bearing

A bearing is required to run at a speed of N = 2000 RPM under a constant radial load (Fr) of 674 Lbf and to

achieve a basic rating life L10h of 15,000 operating hours. What Cr is required?

Example 3: Finding Maximum Load:

A 6204 bearing must achieve a L10h of 10,000 hours while operating at 15000 RPM. What is the maximum

load (P) this bearing can be subjected to?

2.2) The Life Calculation under combined Axial and Radial Load

In cases of combined radial and axial loading, it is necessary to calculate the equivalent dynamic radial bearing

load (P). This is defined as a hypothetical load, constant in magnitude and direction, acting radially on the radial

bearing, which would have the same influence on the bearing life as the actual loads which the bearing is to be

subjected. Assuming constant load, it is P = xFr + YFa where Fr and Fa are the radial and axial loads,

respectively. The factors x and y vary depending on the Fa

Cor and Fa

Fr ratios.

Table 17: Radial and Thrust Factors X and Y for Determining the Equivalent Dynamic Radial Load for ball

bearings

ENGINEERING DATA

62

= ( )

L10 = ( )

Cr = P = 674

Cr

P

P

L10h = ( ) Cr

P

16,667

n

L10 = ( ) = = 17,000 hours

= 8,200 Lbf.

= 300 Lbf.

Cr

P

16,667

n

16,667

700

16,667

700

3 3

3150

350 (729)

L10h = ( ) = ( ) = Cr

P

16,667

n

16,667

1000

4400

685 4417 hrs

√ √ L10 x n

16,667

P = √ L10 x n

16,667

15,000 x 2,000

16,667

=

√ 10,000 x 1,500

16,667

P = √ (P x n x + (P x n x + … + (P x n x

(n x + (n x + … + ( n x

P = √ (P x + (P x + (P x

100

Cr 2900

= = √ 900

2900

9.65

= ( ) 2900

L10 = ( )

Cr = P = 674

Cr

P

P

L10h = ( ) Cr

P

16,667

n

L10 = ( ) = = 17,000 hours

= 8,200 Lbf.

= 300 Lbf.

Cr

P

16,667

n

16,667

700

16,667

700

3 3

3150

350 (729)

L10h = ( ) = ( ) = Cr

P

16,667

n

16,667

1000

4400

685 4417 hrs

√ √ L10 x n

16,667

P = √ L10 x n

16,667

15,000 x 2,000

16,667

=

√ 10,000 x 1,500

16,667

P = √ (P x n x + (P x n x + … + (P x n x

(n x + (n x + … + ( n x

P = √ (P x + (P x + (P x

100

Cr 2900

= = √ 900

2900

9.65

2900

= ( )

L10 = ( )

Cr = P = 674

Cr

P

P

L10h = ( ) Cr

P

16,667

n

L10 = ( ) = = 17,000 hours

= 8,200 Lbf.

= 300 Lbf.

Cr

P

16,667

n

16,667

700

16,667

700

3150

350 (729)

L10h = ( ) = ( ) = Cr

P

16,667

n

16,667

1000

4400

685 4417 hrs

√ √ L10 x n

16,667

P = √ L10 x n

16,667

15,000 x 2,000

16,667

=

√ 10,000 x 1,500

16,667

P = √ (P x n x + (P x n x + … + (P x n x

(n x + (n x + … + ( n x

P = √ (P x + (P x + (P x

100

Cr 2900

= = √ 900

2900

9.65

2900

F

—a —

Fa F

—a

e ≤e >e Cor Fr Fr

XYX Y

0.014 0.19 2.30

0.028 0.22 1.99

0.056 0.26 1.71

0.084 0.28 1.55

0.11 0.30 1 0 0.56 1.45

0.17 0.34 1.31

0.28 0.38 1.15

0.42 0.42 1.04

0.56 0.44 1.00

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 62

ENGINEERING DATA

63

Equivalent Dynamic Radial Load = P = XFr + YFa

Po = .6Fr + .5Fa when Fa/Fr >.8.

Po = Fr when Fa/Fr ≤.8.

Example 4: Determining Equivalent Dynamic Radial Load Based on Combined Axial and Radial Load

A 6206 bearing is operating at 1000 rpm with a radial load (Fr) of 500 lbs and an axial load (Fa) of 279 lbs.

What is the life (L10h)?

Step 1: Determine thrust factors X and Y:

= = .11 (using table 16, e = .30)

= = .558

³ e

Therefore, (using table 16, X = .56 Y = 1.45)

Step 2: Calculate Equivalent Dynamic Radial Load (P)

P=XFr + YFa = (.56) 500lbs + (1.45) 279 lbs = 685 lbs

Step 3: Calculate L10h

2.3 Determining Equivalent Dynamic Load Based on Load Conditions

In applications with a constant speed, where the load grows linearly from a minimum value (Pmin.) to a maximum

(Pmax.), then drops back to the minimum value, the average load is:

P =

Where P = Equivalent dynamic bearing load in lbs.

When a bearing is subjected to variable load and speed

conditions, the equivalent constant load P can be calculated by:

Where P1 = constant load at n1 RPM for t1 minutes

P2 = constant load at n2 RPM for t2 minutes

Pn = constant load at nn RPM for tn minutes

When a bearing is subjected to variable load but constant speed, the equivalent constant load P can be

calculated by:

___ Fa

Cor

_______ 279 lbs

2540 lbs

___ Fa

Fr

______ 279 lbs

500lbs

___ Fa

Fr

= ( )

L10 = ( )

Cr = P = 674

Cr

P

P

L10h = ( ) Cr

P

16,667

n

L10 = ( ) = = 17,000 hours

= 8,200 Lbf.

= 300 Lbf.

Cr

P

16,667

n

16,667

700

16,667

700

3 3

3150

350 (729)

L10h = ( ) = ( ) = Cr

P

16,667

n

16,667

1000

4400

685 4417 hrs

√ √ L10 x n

16,667

P = √ L10 x n

16,667

15,000 x 2,000

16,667

=

√ 10,000 x 1,500

16,667

P = √ (P x n x + (P x n x + … + (P x n x

(n x + (n x + … + ( n x

P = √ (P x + (P x + (P x

100

Cr 2900

= = √ 900

2900

9.65

2900

Pmin + 2Pmax ___

3

= ( )

L10 = ( )

Cr = P = 674

Cr

P

P

L10h = ( ) Cr

P

16,667

n

L10 = ( ) = = 17,000 hours

= 8,200 Lbf.

= 300 Lbf.

Cr

P

16,667

n

16,667

700

16,667

700

3 3

3150

350 (729)

L10h = ( ) = ( ) = Cr

P

16,667

n

16,667

1000

4400

685 4417 hrs

√ √ L10 x n

16,667

P = √ L10 x n

16,667

15,000 x 2,000

16,667

=

√ 10,000 x 1,500

16,667

P = √ (P x n x + (P x n x + … + (P x n x

(n x + (n x + … + ( n x

P = √ (P x + (P x + (P x

100

Cr 2900

= = √ 900

2900

9.65

2900

= ( )

L10 = ( )

Cr = P = 674

Cr

P

P

L10h = ( ) Cr

P

16,667

n

L10 = ( ) = = 17,000 hours

= 8,200 Lbf.

= 300 Lbf.

Cr

P

16,667

n

16,667

700

16,667

700

3 3

3150

350 (729)

L10h = ( ) = ( ) = Cr

P

16,667

n

16,667

1000

4400

685 4417 hrs

√ √ L10 x n

16,667

P = √ L10 x n

16,667

15,000 x 2,000

16,667

=

√ 10,000 x 1,500

16,667

P = √ (P x n x + (P x n x + … + (P x n x

(n x + (n x + … + ( n x

P = √ (P x + (P x + (P x

100

Cr 2900

= = √ 900

2900

9.65

2900

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 63

Where P1 = constant load for t1 minutes

P2 = constant load for t2 minutes

Pn = constant load for tn minutes

2.4 Static Load Rating

In cases when the bearings are to rotate at relatively slow speeds, have slow oscillating movements, or are

exposed to shock, the basic static load rating (Cor) must be taken into consideration.

3. Adjusted Rating Life Calculations

Bearing fatigue life can be adjusted for reliability, material and operating conditions through the following formula:

Lhna = a1 x a2 x a3 x Lh (hours)

— a1, Life adjustment Factor for Reliability

L10 is the life based upon 90% survival of a group of bearings. When the application requires a higher reliability,

the a1, life adjustment factor can be selected from table 18.

Table 18

— a2, Life adjustment Factor for Bearing Materials

The a2 life adjustment factor depends upon the properties and heat treatment of the bearing steel. PEER uses

an a2 = 1 for its high quality, vacuum degassed, SAE 52100 steel used in the rings and balls of the bearings.

— a3, Life adjustment Factor for Operating Conditions

The a3 factor is a result of any number of operating factors the end user wishes to consider in the life analysis,

including cleanliness of environment, temperature, lubrication and shaft alignment. These factors taken together

reflect the a3 factor.

ENGINEERING DATA

64

Reliability

% Ln Factor a1

90 L10 1

95 L5 0.62

96 L4 0.53

97 L3 0.44

98 L2 0.33

99 L1 0.21

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 64

ENGINEERING DATA

65

LUBRICANT TYPES

Oil is the basic lubricant for ball bearings. Previously most lubricating oil was refined from petroleum.

Today, however, synthetic oils such as diesters, silicone and fluorocarbon compounds have found acceptance

because of improvements in properties. Compared to petroleum base oils, diesters in general give better

low temperature properties, lower volatility, and better temperature/viscosity characteristics. Silicones and

fluorocarbon compounds possess an even lower volatility and wider temperature/viscosity properties.

Virtually all oils contain additives that limit chemical changes, protect the metal from corrosion, and improve

physical properties (antifoam, etc.).

Grease

Grease is an oil to which a thickener has been added to prevent oil migration from the lubrication site. It is used

in situations where frequent replenishment of the lubricant is undesirable or impossible. All of the oil types

mentioned in the next section can be used as grease bases to which are added metallic soaps, synthetic fillers

and thickeners. The operative properties of grease depend almost wholly on the base oil. Other factors being

equal, the use of grease rather than oil results in higher starting and running torques and can limit the bearing to

lower speeds.

OILS AND BASE FLUIDS

Petroleum Lubricants

Petroleum lubricants have excellent load carrying abilities, but are useable only at moderate temperature ranges

(-25° to 250° F). Greases that use petroleum oils for bases have a high dN capability. Greases of this type

would be recommended for use at moderate temperatures, light to heavy loads, and moderate to high speeds.

Super-Refined Petroleum Lubricants

While these lubricants are usable at higher temperatures than petroleum oils (-65° to 350° F), they still exhibit the

same excellent load carrying capacity. This further refinement eliminates unwanted properties, leaving only the

desired chemical chains. Additives are introduced to increase the oxidation resistance, etc.

Synthetic Lubricants

The diesters are probably the most common synthetic lubricants. They do not have the film strength capacity

of a petroleum product, but do have a wide temperature range (-65° to 350° F) and are oxidation resistant.

Synthetic hydrocarbons are finding a greater use in the miniature and instrument ball bearing industry because

they have proven to be a superior general purpose lubricant.

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 65

Silicone Lubricants

Silicone products are useful over a wide temperature range (-100° to 400° F) but do not have the film strength of

petroleum types and other synthetics. It has become customary in the instrument and miniature bearing industry,

in recent years to derate the dynamic load rating (Cr) of a bearing to 1/3 of the value shown in this catalog if a

silicone product is used. Some silicones have a very low vapor pressure (10-6 Torr) and can be used for bearing

vacuum applications above this pressure.

Perflourinated Polyether

Oils and greases of this type have found wide use where high temperature stability, chemical inertness, or low

vapor pressure (10-9 Torr), are required. This specialty lubricant does not have the film strength of a petroleum

or diester product. However, it does have better film strength than silicone lubricants.

LUBRICATION METHODS

Grease packing to approximately 25% of a ball bearing’s free volume is PEER’s most common method of

lubrication. In some instances, customers have requested that bearings be lubricated 100% full of grease.

It causes shearing, heat buildup and deterioration through constant churning which can ultimately result in

bearing failure.

OPERATION SPEED

When petroleum or synthetic ester oils are used, the limiting speed is dictated by the ball cage material and

design or the centrifugal ball loads rather than by the lubricant.

Lubricant for Commercial and Military Specifications

Lubricants can be designated by the customer to meet a particular specification. We have included a table of

widely used greases and some of their most important characteristics. All commercial oil and grease lubricants

applicable to ball bearings are readily available at PEER.

ENGINEERING DATA

66

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 66

ENGINEERING DATA

67

TYPE dN

LUBRICANT SELECTION

Through years of experience, PEER has simplified the potentially confusing task of selecting the proper lubricant

for your ball bearing applications. Although there are hundreds of lubricants available, PEER can assist you in

selecting an oil or grease appropriate for any ball bearing’s operating parameters. PEER successfully uses the

selection method below.

Step 1

Determine the speed of the bearing and calculate the dN value (dN = bore in mm x RPM). Select the oil type that

will operate within the dN value, refer to table 19.

Step 2

Determine the required minimum operating viscosity V1 of the lubricating oil, or the base oil of the grease. V1 is a

function of the bearing’s pitch diameter Dpw (Dpw = in mm) and its operating speed in RPM, see table 20.

Step 3

Define the temperature range of the application, taking into consideration any factors that will influence the

application’s temperature, such as environment, adjacent machinery, etc. Determine the minimum viscosity of the

lubricating oil, or the base oil of the grease, at 40°C using table 21. The viscosity of the oil at 40°C is a function

of V1 and the maximum temperature of the bearing application.

Step 4

Once you have determined these factors, the lubricant selection has been narrowed to the type of base oil, the

operating temperature range, and the minimum oil viscosity at 40°C. Next, determine whether a grease or oil is

needed for the application. Then, individual lubricants should be examined to determine their suitability for the

application. Refer to the grease table for individual characteristics of the various entries.

SPEED FACTOR

The maximum usable operating speed of a grease lubricant is dependent on the type of oil. The speed factor is a

function of the bore of the bearing (d) in millimeters (mm) and the speed of the bearing (N) in revolutions per

minute (RPM) where: dN = d (bearing bore, mm) x N (RPM).

Table 19. Relationship between lubricants and dN values.

Silicone 200,000

Diester 400,000

Petroleum 600,000

Note: Spray mist oil lubricated bearings can operate in excess of these values but proper care and selection is

essential.

The preceding selection process encompasses nearly all rotating ball bearing applications. It will eliminate those

oils or greases which may be inappropriate. Special environmental conditions (vacuum, radiation, etc.) should be

considered separately because they will determine the use of special lubricants.

d + D ____

2

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 67

ENGINEERING DATA

68

Table 20

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 68

ENGINEERING DATA

69

Table 21

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 69

TABLE 22 - GREASE COMPARISON

ENGINEERING DATA

70

Manufacturer

Product Name

Color

Thickener Type

Oil type

NLGI No.

Base Oil viscosity in

cSt @40°C

cSt @100°C

Recommended op.

Temp. range

Dropping Point

PEER Grease Code

Chevron

Black Pearl EP #2

Black

Polyurea Complex

Mineral

2

154

14

-40° / 320°F

473°F

L107

Chevron

FM #2

Crème/Apricot or

white

Polyurea

FDA Approved

Mineral

2

202

19

-40° / 320°F

550°F

L67

Chevron

Ultra-Duty EP #2

Red

Lithium-12

Hydroxy-stearate

Mineral

2

400

24

23° / 290°F

374°F

L114

Chevron

SRI #2

Green

Polyurea

Mineral

2

116

12

-20° / 350°F

470°F

L19

Dow Corning

41

Black

Carbon Black

Silicone

2

150

28

0° / 550°F

+500°F

L128

Dow Corning

44 Med.Consistency

white

Lithium

Silicone

2

88

22

-40° / 400°F

400°F

L27

Manufacturer

Product Name

Color

Thickener Type

Oil type

NLGI No.

Base Oil viscosity in

cSt @40°C

cSt @100°C

Recommended op.

Temp. range

Dropping Point

PEER Grease Code

DuPont

Krytox 240AC

White

Synthetic

Synthetic

2

270

26

-30° / 550°F

617°F

L76

Exxon

Unirex N2

Green

Lithium

Complex

Mineral

2

115

12.2

-40° / 250°F

437°F

L05

Exxon

Unirex N3

Green

Lithium

Complex

Mineral

3

115

12.2

-40° / 250°F

448°F

L131

Exxon

Beacon 325

Light Tan

Lithium

Synthetic

2

12

3

-65° / 250°F

356°F

L06

Kyodo Yushi

Multemp SB-M

Light Brown

Diurea

Synthetic Hydrocarbon

3

47.6

7.9

-40° / 390°F

+500°F

L157

Kyodo Yushi

Multemp ET-K

Light Brown

Diurea

Synthetic

1.5

95.1

12.8

-40° / 390°F

450°F

L68

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 70

ENGINEERING DATA

71

GREASE COMPARISON (continued)

Manufacturer

Product Name

Color

Thickener Type

Oil type

NLGI No.

Base Oil viscosity in

cSt @40°C

cSt @100°C

Recommended op.

Temp. range

Dropping Point

PEER Grease Code

Kyodo Yushi

Multemp SRL

Light Brown

Lithium

Synthetic Ester

3

26.0

5.1

-40° / 300°F

376°F

L21

Mobil

Polyrex EM

Blue

Polyurea

Mineral

2

115

12.2

-40° / 350°F

550°F

L151

Mobil

Mobilgrease 28

Dark Red

Clay

Synthetic Hydrocarbon/P.A.O.

2

31.8 @38°F

5.9@99°C

-65° / 350°F

+500°F

L60

Mobil

Mobiltemp 1

Amber

Clay

Mineral

1

460

32

0/ 335°F

+500°F

L11

Mobil

Mobilith SHC100

Red

Lithium Complex

Synthetic P.A.O.

2

100

14.5

-60° / 350°F

500°F

L150

Nye

Nyogel 670 #3

Clear

Silica

Synthetic Hydrocarbon

3

194

22.8

-13° / 250°F

None

L228

Manufacturer

Product Name

Color

Thickener Type

Oil type

NLGI No.

Base Oil viscosity in

cSt @40°C

cSt @100°C

Recommended op.

Temp. range

Dropping Point

PEER Grease Code

Nye

Nyogel 753SC

Black

Carbon Black

Synthetic Ester

3

54

9

-40° / 300°F

+500°F

L169

Shell

Aeroshell 5

Amber

Microgel

Mineral

2

520

32

-10° / 350°F

+500°F

L40

Shell

Aeroshell 7

Amber

Microgel

Synthetic Diester

2

10

3

-100° / 300°F

+500°F

L42

Shell

Aeroshell 17

Light Brown

Microgel

Mineral/Synthetic Polyester

2

23

6

-65° / 400°F

+500°F

L79

Shell

Alvania RL2

Amber

Lithium

Mineral

2

98

9.40

-20° / 250°F

385°F

L15

Shell

Alvania RL3

Amber

Lithium

Mineral

3

98

9.40

-20° / 250°F

385°F

L16

*Many more greases available consult with your PEER Representative.

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 71

Inches 0 1 2 3 4 5 6 7 8 9 10 11 12

Fraction Decimal

25.400 50.800 76.200 101.600 127.000 152.400 177.800 203.200 228.600 254.000 279.400 304.800

1/64 0.015625 0.397 25.797 51.197 76.597 101.997 127.397 152.797 178.197 203.597 228.997 254.397 279.797 305.197

1/32 0.031250 0.794 26.194 51.594 76.994 102.394 127.794 153.194 178.594 203.994 229.394 254.794 280.194 305.594

3/64 0.046875 1.191 26.591 51.991 77.391 102.791 128.191 153.591 178.991 204.391 229.791 255.191 280.591 305.991

1/16 0.062500 1.588 26.988 52.388 77.788 103.188 128.588 153.988 179.388 204.788 230.188 255.588 280.988 306.388

5/64 0.078125 1.984 27.384 52.784 78.184 103.584 128.984 154.384 179.784 205.184 230.584 255.984 281.384 306.784

3/32 0.093750 2.381 27.781 53.181 78.581 103.981 129.381 154.781 180.181 205.581 230.981 256.381 281.781 307.181

7/64 0.109375 2.778 28.178 53.578 78.978 104.378 129.778 155.178 180.578 205.978 231.378 256.778 282.178 307.578

1/8 0.125000 3.175 28.575 53.975 79.375 104.775 130.175 155.575 180.975 206.375 231.775 257.175 282.575 307.975

9/64 0.140625 3.572 28.972 54.372 79.772 105.172 130.572 155.972 181.372 206.772 232.172 257.572 282.972 308.372

5/32 0.156250 3.969 29.369 54.769 80.169 105.569 130.969 156.369 181.769 207.169 232.569 257.969 283.369 308.769

11/64 0.171875 4.366 29.766 55.166 80.566 105.966 131.366 156.766 182.166 207.566 232.966 258.366 283.766 309.166

3/16 0.187500 4.762 30.162 55.562 80.963 106.362 131.762 157.162 182.562 207.962 233.362 258.763 284.163 309.563

13/64 0.203125 5.159 30.559 55.959 81.359 106.759 132.159 157.559 182.959 208.359 233.759 259.159 284.559 309.959

7/32 0.218750 5.556 30.956 56.356 81.756 107.156 132.556 157.956 183.356 208.756 234.156 259.556 284.956 310.356

15/64 0.234375 5.953 31.353 56.753 82.153 107.553 132.953 158.353 183.753 209.153 234.553 259.953 285.353 310.953

1/4 0.250000 6.350 31.750 57.150 82.550 107.950 133.350 158.750 184.150 209.550 234.950 260.350 285.750 311.150

17/64 0.265625 6.747 32.147 57.547 82.947 108.347 133.747 159.147 187.547 209.947 235.347 260.747 286.147 311.547

9/32 0.281250 7.144 32.544 57.944 83.344 108.744 134.144 159.544 184.944 210.344 235.744 261.144 286.544 311.944

19/64 0.296875 7.541 32.941 58.341 83.741 109.141 134.541 159.941 185.341 210.741 236.141 261.541 286.941 312.341

5/16 0.312500 7.938 33.338 58.738 84.138 109.538 134.938 160.338 185.738 211.138 236.538 261.938 287.338 312.738

21/64 0.328125 8.334 33.734 59.134 84.534 109.934 135.334 160.734 186.134 211.534 236.934 262.334 287.734 313.134

11/32 0.343750 8.731 34.131 59.531 84.931 110.331 135.731 161.131 186.531 211.931 237.331 262.731 288.131 313.531

23/64 0.359375 9.128 34.528 59.928 85.328 110.728 136.128 161.528 186.928 212.328 237.728 263.128 288.528 313.928

3/8 0.375000 9.525 34.925 60.325 85.725 111.125 136.525 161.925 187.325 212.725 238.125 263.525 288.925 314.325

25/64 0.390625 9.922 35.332 60.722 86.122 111.522 136.922 162.322 187.722 213.122 238.522 263.922 289.322 314.722

13/32 0.406250 10.319 35.719 61.119 86.519 111.919 137.319 162.719 188.119 213.519 238.919 264.319 289.719 315.119

27/64 0.421875 10.716 36.116 61.516 86.916 112.316 137.716 163.116 188.516 213.916 239.316 264.716 290.116 315.516

7/16 0.437500 11.112 36.513 61.912 87.312 112.712 138.112 163.512 188.913 214.312 239.713 265.113 290.513 315.913

29/64 0.453125 11.509 36.909 62.309 87.709 113.109 138.509 163.909 189.309 214.709 240.109 265.509 290.909 316.309

15/32 0.468750 11.906 37.306 62.706 88.106 113.506 138.906 164.306 189.706 215.106 240.506 265.906 291.306 316.706

31/64 0.484375 12.303 37.703 63.103 88.503 113.903 139.303 164.703 190.103 215.503 240.903 266.303 291.703 317.103

1/2 0.500000 12.700 38.100 63.500 88.900 114.300 139.700 165.100 190.500 215.900 241.300 266.700 292.100 317.500

33/64 0.515625 13.097 38.497 63.897 89.297 114.697 140.097 165.497 190.897 216.297 241.697 267.097 292.497 317.897

17/32 0.531250 13.494 38.894 64.294 89.694 115.094 140.494 165.894 191.294 216.694 242.094 267.494 292.894 318.294

35/64 0.546875 13.891 39.291 64.691 90.091 115.491 140.891 166.291 191.691 217.091 242.491 267.891 293.291 318.691

9/16 0.562500 14.288 39.688 65.088 90.488 115.888 141.283 166.688 192.088 217.488 242.888 268.288 293.688 319.088

37/64 0.578125 14.684 40.084 65.484 90.884 116.284 141.684 167.084 192.484 218.284 243.284 268.684 294.084 319.484

19/32 0.593750 15.081 40.481 65.881 91.281 116.681 142.081 167.481 192.881 218.281 243.681 269.081 294.481 319.881

39/64 0.609375 15.478 40.878 66.278 91.678 117.078 142.478 167.878 193.278 218.678 244.078 269.478 294.878 320.278

5/8 0.625000 15.875 41.275 66.675 92.075 117.475 142.875 168.275 193.675 219.075 244.475 269.875 295.275 320.675

41/64 0.640625 16.272 41.672 67.072 92.472 117.872 143.272 168.672 194.072 219.472 244.872 270.272 295.672 321.072

21/32 0.656250 16.669 42.069 67.469 92.869 118.269 143.669 169.069 194.469 219.869 245.269 270.669 296.069 321.469

43/64 0.671875 17.066 42.466 67.866 93.266 118.666 144.066 169.466 194.866 220.266 245.666 271.466 296.466 321.866

11/16 0.687500 17.462 42.862 68.263 93.662 119.062 144.462 169.862 195.262 220.662 246.062 271.463 296.863 322.263

45/64 0.703125 17.859 43.259 68.659 94.059 119.459 144.859 170.259 195.659 221.059 246.459 271.859 297.259 322.659

23/32 0.718750 18.256 43.656 69.056 94.456 119.856 145.256 170.656 196.056 221.456 246.856 272.256 297.656 323.056

47/64 0.734375 18.653 44.053 69.453 94.853 120.253 145.653 171.053 196.453 221.853 247.253 272.653 298.053 323.453

3/4 0.750000 19.050 44.450 69.850 95.250 120.650 146.050 171.450 196.850 222.250 247.650 273.050 298.450 323.850

49/64 0.765625 19.447 44.847 70.247 95.647 121.047 146.447 171.847 197.247 222.647 248.047 273.447 298.847 324.247

25/32 0.781250 19.844 45.244 70.644 96.044 121.444 146.844 172.244 197.644 223.044 248.444 273.844 299.244 324.644

51/64 0.796875 20.241 45.641 71.041 96.441 121.841 147.241 172.641 198.041 223.441 248.841 274.241 299.641 325.041

13/16 0.812500 20.638 46.038 71.438 96.838 122.238 147.638 173.038 198.438 223.838 249.238 274.638 300.038 325.438

53/64 0.828125 21.034 46.434 71.834 97.234 122.634 148.034 173.434 198.834 224.234 249.634 275.034 300.434 325.834

27/32 0.843750 21.431 46.831 72.231 97.631 123.031 148.431 173.831 199.231 224.631 250.031 275.431 300.831 326.231

55/64 0.859375 21.828 47.228 72.628 98.028 123.428 148.828 174.228 199.628 225.028 250.428 275.828 301.228 326.628

7/8 0.875000 22.225 47.625 73.025 98.425 123.825 149.225 174.625 200.025 225.425 250.825 276.225 301.625 327.025

57/64 0.890625 22.622 48.022 73.422 98.822 124.222 149.622 175.022 200.422 225.822 251.222 276.622 302.022 327.422

29/32 0.906250 23.019 48.419 73.819 99.219 124.619 150.019 175.419 200.819 226.219 251.619 277.019 302.419 327.819

59/64 0.921875 23.416 48.816 74.216 99.616 125.016 150.416 175.816 201.216 226.616 252.016 277.416 302.816 328.216

15/16 0.937500 23.812 49.212 74.612 100.012 125.413 150.812 176.212 201.612 227.012 252.412 277.813 303.213 328.613

61/64 0.953125 24.209 49.609 75.009 100.409 125.809 151.209 176.609 202.009 227.409 252.809 278.209 303.609 329.009

31/32 0.968750 24.606 50.006 75.406 100.806 126.206 151.606 177.006 202.406 227.806 253.206 278.606 304.006 329.406

63/64 0.984375 25.003 50.403 75.803 101.203 126.603 152.003 177.403 202.803 228.203 253.603 279.003 304.403 329.803

Inch - Millimeter

1 inch = 25.400mm

ENGINEERING DATA Metric Conversion Table

CONVERSION TABLE

72

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 72

Metric Conversion Table

73

Fraction Inch mm Fraction Inch mm Fraction Inch mm

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 73

74

Temperature Conversion Table Metric Conversions

°C °C/°F °F °C °C/°F °F °C °C/°F °F °C °C/°F °F

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 74

75

Metric Conversions

MULTIPLY

Celsius Temperature (tc)

Centimeter (cm)

Centimeter (cm)

Dyne

Dyne-Centimeter

Fahrenheit Temperature (tf)

Foot (ft)

Foot (ft)

Gallon, U.S. liquid (gal)

Gram (g)

Horsepower (hp)

Horsepower (hp)

Inch (in)

Inch (in)

Inch (in)

Joule (J)

Kilogram (kg)

Kilogram-force (kgf)

Kilometer (km)

Liter (l)

Liter (l)

Liter (l)

Meter (m)

Meter (m)

Meter (m)

Micron (µm)

Micron (µm)

Mile

Millimeter (mm)

Millimeter (mm)

Newton (N)

Ounce (oz)

Pound (lb)

Pound-force (lbf)

Yard (yd)

BY

9/5(tc)+32=tf

.3937

10

.00001

.0000001

5/9(tf)-32=tc

30.48

.3048

3.785412

.03527397

.7456999

745.6999

2.540

.0254

25.4

.0009478170

2.20

9.80665

.6213712

.03531466

.001

.2641720

39.37008

3.280840

1.0936

1000

106

1.609344

.03937008

.003280840

.2248

28.3495

.453592

4.448

.9144

TO OBTAIN

Fahrenheit Temperature (tf)

Inch (in)

Millimeter (mm)

Newton (N)

Newton-meter (N-m)

Celsius Temperature (tc)

Centimeter (cm)

Meter (m)

Liter (l)

Ounce (oz)

Kilowatt (kW)

Watt (W)

Centimeter (cm)

Meter (m)

Millimeter (mm)

British thermal unit (Btu)

Pound (lb)

Newton (N)

Mile

Cubic foot (ft3)

Cubic meter (m3)

Gallon, U.S. liquid

Inch (in)

Foot (ft)

Yard (yd)

Millimeter (mm)

Meter (m)

Kilometer (km)

Inch (in)

Foot (ft)

Pound-force (lbf)

Gram (g)

Kilogram (kg)

Newton (N)

Meter (m)

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 75

USA

PEER Bearing Headquarters

2200 Norman Drive

Waukegan, IL 60085

USA

Ph: 1 847 578 1000

info@peerbearing.com

China

PEER China – SPZ

Rm 2306 Fortune Times Building #1438 North

Shaanxi Road Putuo District, Shanghai,

China

Ph: +86 21 61484816

sales@peerchina.com

Italy

PEER Bearing S.R.L.

Via Paolo Nanni Costa, 12/3 A

40133 Bologna

Italy

Europe.info@peerbearing.com

Germany

PEER Bearing GmbH

Mainzer Landstraße 47

60329 Frankfurt am Main

Germany

Ph: +49 (0) 69 95 92 54 90

Europe.info@peerbearing.com

Brazil

Alameda Mamoré, 535-cj. 408/410

Alphaville–Barueri–SP Brazil

CEP 06454-040

Ph: +55 11 4166 5650

LAM.info@peerbearing.com

United Kingdom

Unit 6, Chelworth Park

Chelworth Road

Cricklade, Wilshire

SN6 6HE, England

Ph: +44 (0) 1793 759459

Europe.info@peerbearing.com

沈阳瑞思达轴承有限公司SHENYANG TOTAL BEARING CO.,LTD.

Tel: 024 22945833 22923833 24853899 Fax: 024 88729249

Mobile: 13940483518 15640413155（微信）

Web: https://www.rstbearing.com.cn

77

Notes

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 77

Notes Notes

78

8-15 NEW 2V2-2.qxp 2009.4.15 2:37 PM Page 78

 Valued bearing solutions for agricultural, electrical, fluid, HVAC, lawn & garden,

material handling and transmission industries

 Global application

engineering support

 TS-16949 certified

manufacturing facilities

 Dedicated research

and development center

 Testing capabilities

include: fatigue life,

noise/vibration, mud

slurry and salt spray testing

 Flexible manufacturing to allow for low to high volume production

 Customer service excellence

632

沈阳瑞思达轴承有限公司SHENYANG TOTAL BEARING CO.,LTD.

Tel: 024 22945833 22923833 24853899 Fax: 024 88729249

Mobile: 13940483518 15640413155（微信）

Web: https://www.rstbearing.com.cn