The S99NH2-BN0612 is a caged needle roller bearing designed for use on hardened shafts, offering high load capacity and low friction. It has a bore diameter of 3/16 inch, an outer diameter of 0.3437 inch, and a width of 0.375 inch. The bearing is rated for a dynamic load of 618 lbf and a static load of 533 lbf, with a maximum speed of 40,000 rpm when lubricated with oil. The rollers are made of 52100 hardened chrome steel, the cup is case-hardened steel, and the cage is low carbon steel. Shaft surface hardness must be Rc 58 minimum or an inner race must be used. With grease lubrication, maximum speed is reduced to 60% of the oil-rated value.
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-BN0612 |
| Product Name | Mount Bearing on Hardened Shaft or Use Hardened Inner Race |
| Application | Aerospace |
