Shielded Ball Bearing 4x16x5 Miniature With Double ZZ Shields Deep Groove Pre Lubricated Chrome Steel 52100 For Dust-Proof Precision Machinery And Hobby Projects Ideal For Robotics RC CNC And Low-Friction Motion Pro

Compact shielded 634ZZ bearing in 4x16x5 mm size, 1 pack
✔️ Shielded, pre-lubricated 4x16x5 mm deep groove bearing, 1 pack

634ZZ is a compact shielded ball bearing made from chrome steel (52100) with double metal shields to block dust. It’s pre-lubricated, making it ready for immediate use in small assemblies such as precision robotics, RC models, and other compact mechanisms where smooth, reliable rotation matters.

✅ Inner diameter: 4 mm
✅ Outer diameter: 16 mm
✅ Width: 5 mm
✅ Shielding: ZZ double metal shields
✅ Material: chrome steel 52100 alloy
✅ Lubrication: factory pre-lubricated with grease
✅ Dynamic load rating Cr: 1,750 N
✅ Static load rating Cor: 670 N
✅ Maximum speed: up to 40,000 RPM (greased)
✅ Pack: 1 bearing

💡 What is a shielded ball bearing used for in small machines? Handy overview for hobbyists and light machinery.
- Small, compact shafts in tight spots
- Dust protection helps extend bearing life
- Pre-lubricated grease reduces maintenance
- Quiet, smooth operation in hobby projects