A 7B 4MP020404 is a sintered bronze plain bearing with a 2 mm bore diameter and 4 mm outside diameter, designed for self-lubricating applications. The bearing has a length of 4 mm and is manufactured from oil-impregnated bronze. Tolerances for the bore diameter are specified as +0.024/+0.014 mm for 2 mm bores, and for the outside diameter of 4 mm, the tolerance is +0.027/+0.015 mm.
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 | Plain Bearings and Sleeve Bearings |
| Product Number | A 7B 4MP020404 |
| Product Name | 2 mm Bore, 4 mm outside Diameter, Plain Sintered Bronze Bearing |
| Bushing Type | Sleeve |
| Design Units | Metric |
| Housing Bore | 0.0787 inch (2.00 mm) |
| Bearing OD | 0.1575 inch (4.00 mm) |
