15mm de roulements à billes ouverts Par 21mm Par 4mm Chrome Steel Roulement 52100 durable et de haute précision destiné aux équipements industriels et aux applications générales ; adapté aux machines et équipements utilisés dans les secteurs de l'industrie, de l'automobile, de la robotique et des systèmes de convoyage

15x21x4 Open Ball Bearing, Single 52100 Chrome Steel
✔️ ID 15mm, OD 21mm, width 4mm; chrome steel 52100, 1 pc

This open ball bearing measures 15x21x4 mm and is made from 52100 chrome steel. It’s a standard size used across many machines, from hobby projects to light industrial gear assemblies, where easy mounting and regular lubrication matter.

✅ Inner diameter 15 mm
✅ Outer diameter 21 mm
✅ Width 4 mm
✅ Material: 52100 chrome steel, open deep groove

💡 What is an open ball bearing typically used for in small machinery?

It's handy for compact projects needing smooth rotation and easy lubrication.

- handy for hobby robotics, small machinery, DIY projects
- supports radial loads with simple lubrication
- pairs with standard shafts and housings
- ensures proper lubrication and clearance for longer life