A 7Z33-PB250N is a pillow block-mounted needle roller bearing with a 0.2500 inch bore and a sintered aluminum housing, designed for self-aligning operation to ±5° and self-lubricating performance. It operates between -22°F and +212°F, with a maximum radial load capacity of 210 lbf and a maximum speed of 44,000 rpm. The bearing has an overall height of 7/16 inch, length of 1-1/8 inch, and width of 5/8 inch, with a mounting hole distance of 1-3/4 inch and a mounting flange thickness of 9/32 inch.
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 7Z33-PB250N |
| Product Name | 0.25" Bore, Pillow Block-Mounted with Needle Roller Pressbearing |
| Bearing Type | Needle Roller |
| Shaft Diameter | 0.2500 inch (6.35 mm) |
| Load Rating | 210 lbs (95.24 kg) |
| Housing | Aluminum |
