A 7Z29-XS250 is a miniature pillow block-mounted ball bearing with a 0.2500 in. bore, designed for medical, scientific, and pharmaceutical applications. The bearing features a stainless steel race and a sintered aluminum pillow block, with double shielding and lifetime lubrication. It has an overall height of 0.75 in., length of 1.44 in., width of 0.2 in., and flange mounting length of 1.125 in. The housing has a height to mounting centerline of 0.3750 in., a mounting hole diameter of 0.125 in., and supports a maximum radial load of 256 lbf at up to 40,000 rpm. Operating temperature ranges from -22°F to +248°F.
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 | Pillow Block Bearings |
| Product Number | A 7Z29-XS250 |
| Product Name | 0.25 in. Bore, Pillow Block-Mount with Stainless Steel Pressbearing |
| Rated Speed | 40000 rpm |
| Housing | Aluminum |
| Length | 1.44 inch (36.58 mm) |
