10 Pack 3x9x2.5 Open Ball Bearings Deep Groove Chrome Steel 52100 3 mm Inner Diameter 9 mm Outer Diameter 2.5 mm Width Lot of 10 for Precision Miniature Applications

These compact open ball bearings use 52100 chrome steel for durability and smooth operation, sized at 3 mm inner, 9 mm outer, and 2.5 mm wide. They’re a common choice for small hobby projects, robotics hubs, model builders, and micro-mechanical assemblies where lightweight, reliable rotation matters.

✅ Inner diameter 3 mm, outer diameter 9 mm, width 2.5 mm.
✅ Material: 52100 chrome steel for durability and wear resistance.
✅ Dynamic load rating Cr: 430 N; Static load rating Cor: 160 N.
✅ Grease lubrication up to 60,000 RPM; Oil lubrication up to 72,000 RPM.
✅ Pack size: 10 bearings per order.

💡 What is an open ball bearing used for in precision micro machinery?

Handy for compact systems where precise rotation is key.

• 3x9x2.5 mm open ball bearing in chrome steel
• Low friction for accurate movement in small assemblies
• Grease or oil lubrication supports high RPM and long life
• Open design allows quick inspection and maintenance