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 Our standard steel balls are manufactured for such applications

 as bearings, bicycle parts, casters and wheels, etc. Currently,

 we have a  capacity of 200 tons of balls per month.

 

 Available ball materials and diameters

 The materials used in our daily production are carbon steel,  stainless steel and chrome alloy steel.  

 Available diameters are listed as follows.

             AFBMA grades

The AFBMA 10 standards are commonly used by American ball or ball bearing manufacturers. We normally make our balls to the standards. We also make balls to DIN 5401 standards if it is preferred.

  

We are capable of producing grade 100 to grade 1000 quality.

    

Grade	Ball Diameter tolerance	Ball Roundness	Unit Diameter Tolerance
100	0.0001"     2.5 μ	0.0001"     2.5 μ	0.0002"    5.0 μ
200	0.0002"     5.0 μ	0.0002"     5.0 μ	0.0004"  10.0 μ
300	0.0003"     7.5 μ	0.0003"     7.5 μ	0.0006"  15.0 μ
500	0.0005"    12.7 μ	0.0005"     12.7 μ	0.001"    25.4 μ
1000	0.001"      25.4 μ	0.001"       25.4 μ	0.002"    50.8 μ

　

Hardness

We normally case harden our carbon steel balls to Rockwell 60. While chrome alloy steel balls are

through hardened to Rockwell 63. Stainless steel balls 300 series are normally unhardened. Only the

type AISI 420 is hardened to Rockwell 45.

   

All hardness is measured on the ball surface. The tolerance of hardness difference in each unit container is normally +/- 3 degrees.

 

Special Balls