A 7Y55-ESS5025 is an extended inner ring ball bearing with a 0.25 inch bore and 0.500 inch outside diameter, featuring a double shield and lubricated with oil per MIL-PRF-6085. It has a dynamic load rating of 140 lbf and a static load rating of 59 lbf, constructed from 440C stainless steel, and complies with ABEC 3 tolerance standards. The bearing measures 0.250 inch in width, with inner and outer land diameters referenced but not guaranteed, and is designed for low-friction rotational support in precision applications.
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 | Ball Bearings |
| Product Number | A 7Y55-ESS5025 |
| Product Name | 0.25" Bore, 0.5" Outside diameter., Lubricated With Oil ( MIL-L-6085A) |
| Application | Pump |
| Material / Plating | Stainless Steel |
| Bearing Class | ABEC3 / Class 6 / P6; 440C Stainless. / ABEC 3 |
| Design Units | Inch |
| Bore | 0.2500 inch (6.350 mm) |
