10 Pack Premium 6801 Open Ball Bearings 12mm Inner Diameter 21mm Outer Diameter 5mm Width Deep Groove Chrome Steel Open Bearing Durable Set Packed In Plastic Tube

This 10-pack offers 6801 open ball bearings crafted from chrome steel, sized 12x21x5 mm. Ideal for hobby robotics, small machinery, DIY projects, and inline skate components where easy lubrication and inspection are helpful.

✅ Inner diameter: 12 mm
✅ Outer diameter: 21 mm
✅ Width: 5 mm
✅ Material: Chrome steel
✅ Type: Open deep-groove bearing
✅ Pack: 10 bearings in a plastic tube

💡 What is a handy use case for sealed ball bearings in small machines?

These handy bearings keep compact setups turning smoothly with low friction and easy maintenance.

• handy for hobby robotics, RC gear, small CNC builds, and DIY projects
• chrome steel construction provides durable, long-lasting performance under light loads
• open design allows quick lubrication and inspection during servicing
• standard 12x21x5 mm size makes replacements simple