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  • Separable components simplify mounting and removal
  • Long life
  • High radial and impact load capacity
  • Low noise
  • Not suitable for thrust loads
  • Machined brass cage reduces vibration
  • Effective when the bearing rings require interference
  • Low friction between rollers and flanges
  • Inner ring with ribs on both sides
  • Outer ring without rib


Bearing MaterialSteel Alloy
Bore Diameter55 mm
Cage MaterialMachined Brass
Closure TypeOpen
Load Capacity69500 N Dynamic/96500 N Static
Maximum Speed10500 rpm Grease/12400 rpm Oil
Number of Rows2
Outside Diameter90 mm
SeriesNN Series
Width26 mm


Pumps, Blowers, Speed Reducers, General Machinery, Main Spindle Support for Lathes, Milling Machines, Machining Centers and High Speed Applications

Additional Information

Precision double-row cylindrical roller bearings utilize a modified cylindrical roller that provides line contact with the inner and outer ring raceways. They are suitable for high speeds and have a high radial load capacity. The rollers are guided by ribs on the inner ring. These bearings are not be able to accept any axial loading, however they will allow some axial movement. The inner and outer rings are separable which may aid in the assembly/disassembly of components The _NN_ Type bearings have three shoulders on the inner ring that retains the rollers and cage. The outer ring has no shoulders. They have a tapered bore and machined brass cage. Radial clearance of tapered-bore bearings can be adjusted during the mounting process. These bearings have high radial rigidity and are used primarily for high-speed, high-accuracy applications such as; main spindle support for lathes, milling machines and machining centers.

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