The S99NH2MBN2012 is a caged needle roller bearing designed for use with hardened shafts from 3 mm to 25 mm diameter. It has a shaft diameter of 20 mm, an outer diameter of 26 mm, and a face width of 12 mm. The bearing supports a dynamic load capacity of 8598 N and a static load capacity of 12100 N, with a maximum speed of 13000 rpm when oil-lubricated. The roller cup is made of case-hardened steel, the needles of 52100 hardened chrome steel, and the cage of low carbon steel. Shaft surface hardness must be HRC 58 minimum, or an inner race must be used. Housing bore tolerances follow the N6 specification for steel or cast iron.
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 | S99NH2MBN2012 |
| Product Name | Mount Bearing on Hardened Shaft or Use Hardened Inner Race |
| Application | Aerospace |
| Design Units | Metric |
| Bore | 0.7874 inch (20.000 mm) |
