10 Pack Shielded Ball Bearings 6904ZZ 20 x 37 x 9 mm Set of 10 Durable Chrome Steel Bearings for Industrial Use Precision Rotation Low Friction Long Life and Reliable Performance

These shielded ball bearings are 61904ZZ type, sized 20x37x9 mm, built from tough chrome steel for long life. They arrive pre-lubricated with grease and feature double shields to block dust, making them a solid choice for machinery, conveyors, and light industrial projects.

✅ Bore: 20 mm
✅ Outer diameter: 37 mm
✅ Width: 9 mm
✅ Material: Chrome steel
✅ Shielding: Double ZZ shields
✅ Lubrication: Pre-lubricated with grease
✅ Speed: Up to 19000 rpm
✅ Packaging: 10 bearings in a plastic tube

💡 What is a sealed ball bearing used for in compact machinery? This handy component supports rotating shafts in tight spaces while keeping dust out and grease in.

• Low friction operation for smooth rotation
• Dust shields extend bearing life in harsh environments
• Pre-lubricated grease allows immediate use
• Common in robotics, small conveyors, and compact drives