Φ12.7(1/2'')Precision Instrument Stainless Steel Balls , Bicycle Bearing Balls

Ball diameter
(mm)

Quantity per kilogram

Ball diameter
(mm)

Quantity per kilogram

Ball diameter
(mm)

Quantity per kilogram

2.0000

30700

9.0000

337

19.0000

35.77

2.3812 3/32

18182

9.5250 3/8

284

19.0500

3/4

35.5

2.5000

15698

10.0000

245

19.8438

25/32

31.4

3.0000

9091

10.3188 13/32

223

20.637013/16

27.9

3.1750 1/8

7634

11.0000

185

21.0000

26.49

3.5000

5717

11.1125 7/16

179

21.4313 27/32

24.9

3.9688 5/32

3922

11.5000

161

22.2250 7/8

22.3

4.0000

3831

11.5094 29/64

161

23.0000

20.17

4.7625 3/16

2268

11.9062 15/32

145

23.0188 29/32

20.1

5.0000

1961

12.0000

142

23.8125 15/16

18.2

5.1594 13/64

1786

12.303131 /64

132

24.0000

17.75

5.5562 7/32

1431

12.7000 1/2

120

24.6063 31/32

16.5

5.9531 15/64

1163

13.4938 17/32

100

25.0000

15.70

6.0000

1136

14.0000

89

25.40000 1

15

6.3500 1/4

962

14.2875 9/16

84.0

26.9875 1'/32

13.64

6.5000

894

15.0812 19/32

71.4

26.9875 1'/16

12.47

6.7469 17/64

800

14.8750 5/8

61.3

27.7812 1'/32

11.4

7.1438 9/32

671

16.0000

59.9

28.0000

11.18

7.9372 5/16

490

16.6688 21/32

52.9

28.5750 1'/8

10.50

8.0000

478

17.0000

50

30.1625 1'/16

8.93

8.5000

400

17.4625 11/16

46.1

8.7312 11/32

369

18.2562 23/32

40.3

Grade

Ball diameter variation

Spherical deviation

Ball surface roughness

Ball diameter variation

Basic diameter tolerance

Vdws

△Sph

Ra

Vdwl

Tdn

No more than (um)

10

0.25

0.25

0.025

0.5

*

16

0.4

0.4

0.032

0.8

*

20

0.5

0.5

0.05

1

*

28

0.7

0.7

0.05

1.5

*

40

1.0

1.0

0.08

2

*

60

1.5

1.5

0.10

3

*

100

2.5

2.5

0.125

5

±12.5

200

5

5

0.2

10

±25

500

13

13

*

25

±50

1000

25

25

*

50

±125