The S99RH2MBNR0912 is a hardened inner race designed for use with needle roller bearings on soft shafts, manufactured from alloy steel hardened to HRC 58 minimum. It has a bore diameter of 9 mm and an outer diameter of 12 mm, with surface roughness of 0.40 µm AA and recommended shaft fit tolerances per k6. All corners are chamfered for assembly ease, and it is compatible with bearing model S99NH2MBN1212. Other sizes in the series accommodate shaft translation and are available on special order.
A bearing is a device that reduces friction between moving components by preventing metal-to-metal contact while assisting components (shafts, axles, and wheels) to freely rotate around a fixed axis, cutting down on heat generation and the amount of energy that is consumed. By replacing sliding motion with low-friction rolling motion, the life of the rotating components is increased. A bearing also keeps the shaft in the proper position, providing support and alignment and transferring the axial or radial loads to the housing.
The types of bearings that we offer include rolling element bearings, which consist of both ball bearings and roller bearings.
Balls are utilized as the rolling element in ball bearings; a retainer holds the balls in place and allows them to freely rotate. The balls are kept inside channels cut in both the inner and outer races. Because there is no surface contact between the balls and races, precision ball bearings have a lower load capacity for their size than other bearings.
| Stock Drive Products & Sterling Instrument - SDP/SI | |
|---|---|
| Product Category | Needle Roller Bearings |
| Product Number | S99RH2MBNR0912 |
| Product Name | Hardened and Grounded Inner Race for Mounting Needle Roller Bearing |
| Application | Aerospace |
