The S99NH2-BN1220 is a caged needle roller bearing designed for use on hardened shafts from 1/8 to 1 inch in diameter, with a bore of 3/8 inch and an outer diameter of 0.5625 inch. It has a width of 0.625 inch and is rated for a dynamic load of 1664 lbf and a static load of 2046 lbf at a maximum speed of 25000 rpm when oil-lubricated. The bearing features a case-hardened steel roller cup, 52100 hardened chrome steel needles, and a low carbon steel cage, offering high load capacity, low rolling friction, and low sensitivity to misalignment. Shaft surface hardness must be Rc 58 or higher, or an inner race must be used for softer shafts.
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 | S99NH2-BN1220 |
| Product Name | Mount Bearing on Hardened Shaft or Use Hardened Inner Race |
| Application | Aerospace |
