HARDNESS & CRUSHING LOAD

SIZE

CHROME STEEL BALL

CARBON STEEL BALL

inch

mm

Surface Hardness

Crushing Load(KN)

Surface Hardness

Crushing Load(KN)

Carburizing depth(mm)

 

0.5

HV760

HV880

 

 

 

 

 

 

Minimum Crush Load ≧ D1.73〔KN〕

HV760

HV880

 

0.1

1/32”

0.794

 
 

1.0

 

1/16”

1.588

170

0.4

 

2.0

250

3/32”

2.381

300

0.5

 

2.5

 
 

3.0

 

1/8”

3.175

HRC60

HRC66

54.0-59.5

500

0.6

5/32”

3.969

55.5-61.5

800

 

4.0

--

3/16”

4.762

57.0-62.5

1100

0.8

 

5.0

1100

7/32”

5.556

57.5-63.0

1200

0.9

 

6.0

58.0-63.5

1200

1/4”

6.350

1600

1.1

5/16”

7.938

59.0-64.5

2400

3/8”

9.525

3000

1.4

7/16”

11.112

60.0-65.5

3500

1.7

1/2”

12.7

4500

1.8

5/8”

15.875

 

1.9

3/4”

19.050

61.0-66.0

 

2.0

7/8”

22.225

 

1”

25.4

 

 Note :**Hardness readings taken on spherical surface are subject to the correction shown on Table 1.
**Curshing load shown above is minimum level. Adjustment can be made to meet customer's specifications.