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Grade

Specification

Diametertolerance(um)

Sphericalerror(um)

I

≤10mm

±10.25

0.25

II

≤25mm

±10.50

0.5

III

≤25mm

±11

1

25mm-50mm

±13.5

1.5

50mm-75mm

±14

2

75mm-100mm

±17.5

2.5

100mm-125mm

±21

3

125mm-150mm

±24.5

3.5

IV

≤10mm

±14

2

V

≤25mm

±75

25

25mm-50mm

±113

38

50mm-75mm

±150

50

75mm-100mm

±188

63

100mm-125mm

±225

75

125mm-150mm

±263

88

VI

 

±200

 

 

 

Ball standar dsinvarious countries

Grade

Balldiametervariation

Sphericalerror

Surfaceroughness

G3

0.08

0.08

0.01

G5

0.13

0.13

0.014

G10

0.25

0.25

0.02

G16

0.4

0.4

0.025

G20

0.5

0.5

0.032

G24

0.6

0.6

0.04

G28

0.7

0.7

0.05

G40

1

1

0.06

G60

1.5

1.5

0.08

G100

2.5

2.5

0.1

G200

5

5

0.15

Domestic standards GB/T308-2002

 

Grade

Balldiametervariation

Sphericalerror

Surfaceroughness

G3

0.08

0.08

0.01

G5

0.13

0.13

0.014

G10

0.25

0.25

0.02

G16

0.4

0.4

0.025

G20

0.5

0.5

0.032

G24

0.6

0.6

0.04

G28

0.7

0.7

0.05

G40

1

1

0.06

G60

1.5

1.5

0.08

G100

2.5

2.5

0.1

G200

5

5

0.15

American Standard ANSI/ASMEStd.10A-2001

 

Grade

Balldiametervariation

Sphericalerror

Surfaceroughness

G3A

0.08

0.08

0.012

G5A

0.13

0.13

0.02

G10A

0.25

0.25

0.025

G16A

0.4

0.4

0.025

G24A

0.6

0.6

0.05

G48A

1.2

1.2

0.08

G100A

2.5

2.5

0.125

G200A

5

5

0.2

G500A

13

13

*

G1000A

25

25

*

G2000A

50

50

*

German standard DIN5401