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Needle roller bearings are a bearing that is classified as either
radial or thrust depending on the direction of the load being
supported. Needle roller bearings include bearings whose rollers
slightly exceed the size range of needle rollers as stipulated by
ISO. Needle roller bearings include drawn cup and solid radial
bearings, as well as application-specific cam followers, and roller
followers. Thrust bearings include thrust needle bearings.
Cage & Needle Roller Assemblies
Cage & Needle roller assemblies consist of a complement of
needle rollers held in place by a cage. Their unitized design makes
for easy handling and installation. With no inner or outer ring,
the low cross-section provides maximum load-carrying capability
within the smallest envelope.
Properly lubricated, they can operate at high speeds thanks to the
unique cage, which guides the rollers precisely. The controlled
contour rollers in cage & Needle roller assemblies have an
optimum profile which reduces end stresses, allows operation under
moderate misalignment and prolongs bearing life.
Designation | Dimensions (mm) | Load Rating (KN) | Max rpm | Weight | ||||
d | D | B | F | Dyn. | Stat. | kg | ||
NA 4900 2RS | 10 | 22 | 14 | 14 | 6.8 | 6.9 | 13000 | 0.025 |
NA 4901 2RS | 12 | 24 | 14 | 16 | 7.6 | 8.3 | 12000 | 0.028 |
NA 4902 2RS | 15 | 28 | 14 | 20 | 8.6 | 10.3 | 10000 | 0.037 |
NA 4903 2RS | 17 | 30 | 14 | 22 | 8.8 | 11 | 9000 | 0.04 |
NA 4904 2RS | 20 | 37 | 18 | 25 | 17.3 | 19.9 | 7500 | 0.08 |
NA 4905 2RS | 25 | 42 | 18 | 30 | 19.3 | 24.2 | 6500 | 0.09 |
NA 4906 2RS | 30 | 47 | 18 | 35 | 21.1 | 28.5 | 5500 | 0.104 |
NA 4907 2RS | 35 | 55 | 21 | 42 | 26.5 | 39.5 | 4800 | 0.075 |
NA 4908 2RS | 40 | 62 | 23 | 48 | 36 | 53 | 4200 | 0.252 |
NA 4909 2RS | 45 | 68 | 23 | 52 | 38 | 59 | 3900 | 0.29 |
NA 4910 2RS | 50 | 72 | 23 | 58 | 40 | 64 | 3500 | 0.295 |
and so on.