15x21x4 Open Bearing

15x21x4 Open Ball Bearing Chrome Steel Deep Groove Design

✔️ 15mm inner dia 21mm outer dia 4mm thick chrome steel open

The single open ball bearing serves well in standard drive systems requiring minimal friction. You will find this size handy for motor shafts, rollers, and light industrial machinery where grease seals are not needed. Smooth rotation happens thanks to the precision ground raceways.

✅ Durable 52100 chrome steel provides strong resistance to wear and tear.
✅ Open design allows for lubrication to keep spinning efficient in various setups.
✅ Compact dimensions fit into tight housings without requiring extra spacers or brackets.

💡 Why choose steel over ceramic bearings for your equipment?.
- High contact angle support distributes weight evenly along the inner rings.
- Cost effective compared to advanced materials while maintaining reliable performance.
- Compatible with standard lubricants for long service life under steady loads.

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15 x 21 x 4 Open Ball Bearing One Bearing