A 7B 4MF121810 is a flanged, self-lubricating sintered bronze bearing with a 12 mm bore diameter and an 18 mm outside diameter, designed for low-friction rotating applications. It has a flange width of 10 mm and an overall length of 22 mm. The bearing is made from oil-impregnated bronze and operates without external lubrication. Tolerances for bore and outside diameter are specified as +0.050/+0.032 mm and +0.041/+0.023 mm respectively, conforming to the metric series standards listed. The part is part of a standard series with consistent material and self-lubricating properties across variants.
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 4MF121810 |
| Product Name | 12 mm Bore, 18 mm outside Diameter, Flanged Sintered Bronze Bearing |
| Bushing Type | Sleeve |
| Design Units | Metric |
| Housing Bore | 0.4724 inch (12.00 mm) |
| Bearing OD | 0.7087 inch (18.00 mm) |
