Open Ball Bearing 20x42x8mm 16004 Deep Groove Ball Bearing Chrome Steel 52100 Open Bearing With 20mm Bore 42mm Outer Diameter And 8mm Width For Precision Machinery

Open Ball Bearing 20x42x8mm: 16004 Deep Groove 52100 Steel
✔️ ID 20mm, OD 42mm, width 8mm, open design, 1 pc

16004 Open deep groove ball bearing in 20x42x8 mm size, open design for easy lubrication and inspection. This single bearing is ideal for compact machinery, hobby CNC setups, small motors, and linear guides where smooth radial rotation matters.

✅ Bore: 20 mm
✅ Outer diameter: 42 mm
✅ Width: 8 mm
✅ Material: 52100 chrome steel
✅ Type: Open deep groove ball bearing
✅ Dynamic load rating Cr: 7,900 N
✅ Static load rating Cor: 4,500 N
✅ Maximum speed with grease: 18,000 RPM; with oil: 21,000 RPM

💡 What is a 20x42x8 mm deep groove ball bearing used for in small machinery?

Handy in compact setups for reliable radial support and easy maintenance.

- Handy for hobby CNC machines, 3D printers, small motors
- Maintains smooth radial motion under moderate speeds with grease or oil lubrication
- Open design allows quick inspection and cooling during maintenance