684-2RS Ball Bearing - Sealed - Miniature - 4x9x4mm

684-2RS Sealed Ball Bearing
✔️ 4x9x4mm Chrome Steel - Single Bearing

The 684-2RS is a compact deep groove ball bearing made of chrome steel, ideal for small motors, tools, and tight-space mechanical assemblies. Double rubber seals keep out contaminants and lock in lubrication for smooth, maintenance-free operation.

✅ Quantity: 1 Bearing
✅ Size: 4mm inner x 9mm outer x 4mm width
✅ Material: Chrome steel
✅ Type: Deep groove ball bearing
✅ Closures: Double rubber seals (2RS)
✅ Lubrication: Pre-lubricated with grease
✅ Dynamic Load Rating: 640 N
✅ Static Load Rating: 230 N
✅ Max Speed (Grease): 59,000 RPM
✅ Quality: Electric motor grade

💡 What are the advantages of rubber sealed bearings?
Rubber seals help protect against dirt, dust, and moisture, while keeping grease inside - ideal for extending bearing life in small, high-speed applications.

A smart choice when compact, quiet, and sealed performance matters.