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Cylindrical and Controlled Contour

Needle Rollers

These rollers can be supplied with two types of ends, either "Flat head" (form B) or "Tallow drop head (form A).
Tolerances
QUALITY
Diameter Tolerance D
Selection Groups D
Max Circularity error µ
Roughness Max Ra µ
G2
0-10µ
2µ
0.8
0.1
G3
0-10µ
3µ
1.2
0.1
G5
0-10µ
5µ
2
0.15

Needle rollers can be supplied with:

  • diameters selected in groups of 1µ
  • tighter values of length tolerances and possibly also with ground planes
  • a "ZB" or controlled contour profile, as specified below
Most Common Sizes of Needle Rollers
D
4.8
5.8
6.8
7.8
9.8
11.8
13.8
15.8
17.8
19.8
21
21.8
23.8
25
27.8
28
29.8
30
32
34.8
35.5
39.8
41
43.8
49.8
59.8
1
X
X
X
X
1.5
X
X
X
X
X
2
X
X
X
X
X
X
X
2.5
X
X
X
X
X
X
X
3
X
X
X
X
X
X
X
X
X
3.5
X
X
X
X
X
4
X
X
X
X
X
X
X
5
X
X
X
X
X
X
X
X
6
X
X
X
7
X
X
X
X