61801 Open Ball Bearing 12x21x5 mm Lot Of 10 Chrome Steel Deep Groove Bearings For Precision Machinery And RC Hobby Applications In Plastic Tube For CNC Machines And Robotics Projects

10-Pack 61801 Open Ball Bearings: 12x21x5 Chrome Steel
✔️ 61801 open, deep groove bearing, 12x21x5 mm, chrome steel, 10-pack

These 61801 open ball bearings are built from chrome steel for durability and dependable rotation in compact machinery, robotics projects, and hobby CNC setups.

✅ Inner diameter: 12 mm
✅ Outer diameter: 21 mm
✅ Width: 5 mm
✅ Type: Open, deep groove ball bearing
✅ Material: Chrome steel, high-strength alloy
✅ Pack size: 10 bearings per tube

💡 What is an open ball bearing, and where is it typically used?

Open bearings are handy for quick swaps in small machines and hobby gear. - Handy for DIY robotics, 3D printers, and light-duty machinery - Fits common 12 mm bore housings and simple shafts - Provides reliable rotation with straightforward maintenance