Specifications of
Needle Rollers |
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| Shapes of Roller Ends |
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| Shapes of Ends |
Spherical end |
Ball end |
Conical end |
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| Symbol |
A |
R |
T |
| Shapes of Ends |
Flat
end |
Straight trunnion end |
Trunnion end |
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 |
 |
| Symbol |
F |
M |
C |
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Needle
Roller
diameter
Da
(mm) |
Deviation
of mean
diameter |
Out of roundness
cylindrical (max) |
Size variation
diameter per unit container |
Deviation
of length |
| High |
Low |
l/Da≦6 |
6＜l/Da≦10 |
Normal
class |
High
class |
Precision
class |
l/Da≦6 |
6＜l/Da≦10 |
Normal
class |
High
class |
Precision
class |
Normal
class |
High
class |
Precision
class |
High |
Low |
High |
Low |
| -- |
+5 |
-10 |
3 |
2 |
1 |
4 |
3 |
1.5 |
5 |
3 |
2 |
0 |
-200 |
0 |
-300 |
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Material : High carbon chrome bearing steel
Hardness : HRC 60-65
We already have achieved success in manufacturing bearings for machine tool spindles to a super-precision tolerance of
0.1μ and now have established a stable production line to meet the requirements of user-customers. |
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| Needle Roller Dimensions (Da X L) |
| Da×L |
Da×L |
Da×L |
Da×L |
Da×L |
| 1.5×6.8 |
2.5×13.8 |
3.5×11.8 |
4×23.8 |
4.5×37.8 |
| 1.5×7.8 |
2.5×15.8 |
3.5×13.8 |
4×25.8 |
4.5×39.8 |
| 1.5×9.8 |
2.5×17.8 |
3.5×15.8 |
4×27.8 |
4.5×44.8 |
| 1.5×11.8 |
2.5×19.8 |
3.5×17.8 |
4×29.8 |
- |
| 1.5×13.8 |
2.5×21.8 |
3.5×19.8 |
4×31.8 |
5×19.8 |
| - |
2.5×23.8 |
3.5×21.8 |
4×34.8 |
5×21.8 |
| 2×6.8 |
- |
3.5×23.8 |
4×37.8 |
5×23.8 |
| 2×7.8 |
3×9.8 |
3.5×25.8 |
4×39.8 |
5×25.8 |
| 2×9.8 |
3×11.8 |
3.5×29.8 |
- |
5×29.8 |
| 2×11.8 |
3×13.8 |
3.5×31.8 |
4.5×17.8 |
5×31.8 |
| 2×13.8 |
3×15.8 |
3.5×34.8 |
4.5×19.8 |
5×34.8 |
| 2×15.8 |
3×17.8 |
- |
4.5×21.8 |
5×37.8 |
| 2×17.8 |
3×19.8 |
4×13.8 |
4.5×23.8 |
5×39.8 |
| 2×19.8 |
3×21.8 |
4×15.8 |
4.5×25.8 |
5×49.8 |
| - |
3×23.8 |
4×17.8 |
4.5×29.8 |
- |
| 2.5×7.8 |
3×25.8 |
4×19.8 |
4.5×31.8 |
- |
| 2.5×9.8 |
3×27.8 |
4×21.8 |
4.5×34.8 |
- |
| 2.5×11.8 |
- |
- |
- |
- |
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| Note |
If required,rollers of other dimensions than specified can be made to order.Your inquiries are welcome. When placing orders with us, please specify your requirements such as
needle roller dimensions (diameter X length) , shape of roller ends, grades of accuracy, and whether the crowning process is needed. (Example) 2 X 9.8 R,JIS High Class, Crownig.
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Copyright(c)
HIKARI SEIKO Co.,Ltd.
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