Chrome steel balls Specification

Chrome Steel 52100 is a universal material for many applications. Chrome steel balls have an excellent surface quality and high load bearing. TRD produces balls that through statistical process control, assures tolerance accuracy, fine surface finish and a consistent high quality. Our chrome steel balls are available in fractional, decimal and millimeter sizes.

The specification of bearing steel ball 
Diameter (d)Diameter (d)
InchMillimeterInchMillimeter

2
8.5
3/322.38111/328.731

2.5
9

323/649.132

3.13/89.525
1/83.17513/3210.319

3.515/3211.006
5/323.9697/1211.113

431/6412.303

4.51/212.70
3/164.7639/1614.28

59/3215.81

5.55/815.875
7/325.55611/1617.463
15/645.953
18

623/3218.256
1/46.353/419.05

6.525/3219.844

7
20
9/327.14427/3221.431

7.57/822.225
5/167.93831/3224.606

8125.4
5/815.87501 3/444.4500
21/3216.6688
45.0000
11/1617.46251 7/847.6250
23/3218.2562
50.0000
3/419.05002    50.8000
13/1620.63752 1/853.9750
7/822.2250
55.0000
29/3223.01882 1/457.1500
15/1623.8125
60.0000
1     25.400 2 3/860.3250
1 1/1626.98752 1/263.5000
1 1/828.5750
65.0000

30     2 3/469.8500
1 3/1630.1625
70.0000
1 1/431.7500
75.0000

32     3    76.2000
1 5/1633.3375
80.0000

34     3 1/288.9000
1 3/834.9250
90.0000

35     
100.0000
Grade of tolerance and technology requirement
GradeBall diameter variationSpherical deviationBall surface roughnessBall diameter variationBasic diameter tolerance
Vdws?SphRaVdwlTdn
Not exceed not over
um
100.250.250.0250.5*
160.40.40.0320.8*
200.50.50.051*
280.70.70.051.5*
401.01.00.082*
601.51.50.103*
1002.52.50.125512.5
200550.21025
5001313*2550
10002525*50125