6305.2RSR and 6305.2ZR belong to the deep groove ball bearing family, sharing the same core dimensions: 25mm inner diameter, 62mm outer diameter, and 17mm width. Engineered for medium-low speed, medium load, and ambient temperature conditions, they are widely used in general industrial and mechanical fields—their key distinction lies in sealing designs.
6305.2RSR and 6305.2ZR belong to the deep groove ball bearing family, sharing the same core dimensions: 25mm inner diameter, 62mm outer diameter, and 17mm width. Engineered for medium-low speed, medium load, and ambient temperature conditions, they are widely used in general industrial and mechanical fields—their key distinction lies in sealing designs:
6305.2RSR: Comes with double-sided non-contact rubber seals. Provides solid dust and light water protection, along with low-maintenance operation (no need for frequent greasing). It’s perfectly suited for dusty or slightly humid environments like pumps, conveyors, home appliances, and agricultural machinery.
6305.2ZR: Boasts double-sided metal shields. Excels in high-speed operations and basic dust resistance; however, regular lubrication is required for long-term service. It’s ideal for dry, high-rotation scenarios such as electric motors, power tools, and auxiliary mechanisms of machine tools.
Both offer cost-effective, steady rotation—your choice hinges on the specific environment, speed requirements, and maintenance preferences.

| Item | 6305.2RSR, 6305.2ZR |
| Type | deep groove ball bearing |
| Brand | FAG |
| Country of origin | Germany |
| Bore diameter d | 25 mm |
| Outside diameter D | 62 mm |
| Width B | 17 mm |
| Basic dynamic load rating, radial | 22,410 N |
| Basic static load rating, radial | 11,510 N |
| Fatigue load limit, radial | 710 N |
| Limiting speed | 7,400 1/min |
| Weight | 0.242 kg |
| Application | gearboxes, reduers, belt conveyors, pumps, generators etc. |



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