Ball Dia variation

  Deviation From Spherical Form

  Surface Roughness

  µm

3

0.0 8

0.08

0.010

5

0.13

0.13

0.014

10

0.25

0.25

0.020

16

0.4

0.4

0.025

20

0.5

0.5

0.032

28

0.7

0.7

0.040

40

1.0

1.0

0.050

60

1.5

1.5

0.060

100

2.5

2.5

0.080

200

5.0

5.0

0.150

Grade

Lot Dia variation

Grade interval

Preferred Gauge

Subgauge interval

Subgauge

  µm

3

0.13

0.5

-5,…-0.5,0,+0.5,…+5

0.1

-0.2,-0.1,0,+0.1,+0.2

5

0.25

1

-5,…-1,0,+1,…+5

0.2

-0.4,-0.2,0,+0.2,+0.4

10

0.5

1

-9,…-1,0,+1,…+9

0.2

-0.4,-0.2,0,+0.2,+0.4

16

0.8

2

-10,…-2,0,+2,…+10

0.4

-0.8,-0.4,0,+0.4,+0.8

20

1

2

-10,…-2,0,+2,…+10

0.4

-0.8,-0.4,0,+0.4,+0.8

28

1.4

2

-12,…-2,0,+2,…+12

0.4

-0.8,-0.4,0,+0.4,+0.8

40

2

4

-16,…-4,0,+4,…+16

0.8

-1.6,-0.8,0,+0.8,+1.6

60

3

5

-20,…-5,0,+5,…+20

1

-2,-1,0,+1,+2

100

5

10

-40,…,-10,0,+10,…+40

2

-4,-2,0,+2,+4

200

10

15

-60,…,-15,0,+15,…+60

3

-6,-3,0,+3,+6