1、440A Stainless Steel       Hollow Balls
  2、304、316 Stainless Steel       Hollow Balls
  3、5052 Hollow Aluminium       Balls
  4、Si3N4（ZrO2）  Plastic       Balls
 

5﹜Tungsten Carbide Balls
  6﹜Transfer Units Balls
  7﹜440C Stainless Steel Balls
 

8﹜52100 Chrome Steel Balls
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GRADES & OLERANCES.MILLIMETER
DIN
grade
AMBA
grade
deviation from
spherical form
lot diameter
variation
allowable
ball gauge
variation
nominal ball diameter tolerance
marking increments
*max. surface roughness in
micro-meters "Ra"
- 3 .00008 ㊣.00008 ㊣.0008 每 .00025 0.012
每 5 .00013 ㊣.00013 ㊣.0013 每 .00025 0.020
I 10 .00025 ㊣.00025 ㊣.0013 每 .00025 0.025
II 25 .0006 ㊣.0006 ㊣.0025 每 .00025 0.051
III 50 .0012 ㊣.0012 每 ㊣.0051 .00127 0.076
IV 100 .0025 ㊣.0025 每 ㊣.0381 每 0.127
每 200 .0050 ㊣.0050 每 ㊣.0250 每 0.203
每 500 .0125 ㊣.0125 每 ㊣.0635 每 每
V 1000 .0250 ㊣.0250 每 ㊣.1270 每 每

*Maximum surface roughness is an arithmetic average.