Roulement à billes Shielded double Shielded , 4x9x4 , en Chrome Steel 52100, cage en polyamide, pré-lubrifié à la graisse, protection anti-poussière, micro-roulement de haute précision pour RC , les drones et les machines de précision

Small 4x9x4 shielded ball bearing 684ZZ, pre-lubed
✔️ 4x9x4mm shielded chrome steel with dual ZZ shields, pre-lubed, pack 1

This tiny shielded bearing, 4x9x4 mm, is built from durable 52100 chrome steel and features double metal shields to keep dust and contaminants out. It comes pre-lubricated, making it a convenient fit for compact gear trains, mini robotics, and small precision instruments.

✅ Inner diameter: 4 mm
✅ Outer diameter: 9 mm
✅ Width: 4 mm
✅ Material: 52100 chrome steel
✅ Shielding: double metal shields (ZZ)
✅ Cage: poly
✅ Lubrication: pre-lubricated with grease
✅ Pack: 1 bearing

💡 What is a shielded miniature ball bearing used for in small mechanical systems?

- Handy for micro gear drives, RC models, and precision assemblies - Protects against dust and contaminants in tight spaces - Pre-lubricated with grease for quick setup in hobby projects