The A 7Z 7-012 is a thrust bearing set consisting of six S.A.E 1018 steel balls hardened to Rockwell C60 minimum, a molded nylon retainer rated for 250°F maximum, and two CR1075 steel washers hardened to Rockwell C59-61. The bearing has a bore diameter of 1/8 inch with a tolerance of .128 to .133 inch, an outer diameter of 7/16 inch with a tolerance of .430 to .437 inch, and a total thickness of 9/32 inch. It has a dynamic load rating of 120 lbf at 15 rpm and 63 lbf at 100 rpm. The retainer and washer components are designated A 7M 7-012 and A 7Q 7-012 respectively.
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 | Thrust Bearings |
| Product Number | A 7Z 7-012 |
| Product Name | A 7Z 7-012 - Comprised of a Retainer with balls (A 7M 7-012) and Two(2) Washers ( A 7Q 7-012 ) |
| Outside Diameter | 0.4380 inch (11.125 mm) |
