U Groove Ball Bearing 4x13x7mm Deep Groove Pulley Rail Bearing Mini Wheel Set 20 Pack U624ZZ Precision Bearings For Fitness Equipment Telecommunication Instruments Sewing Machines Home Appliances Medical Gear Fishing Doors And Windows

U Groove Ball Bearing 4x13x7mm Rail Pulleys 20 Pack
✔️ 4x13x7mm U-groove rail pulley, double-shielded, high carbon steel

These U-shaped rail bearings are precision-grade components for mini wheels and pulleys used in fitness gear, telecommunications equipment, sewing machines, and home appliances. They deliver smooth, stable motion on low-load sliding rails.

✅ Inside diameter 4 mm; outer diameter 13 mm; thickness 7 mm
✅ V groove width 4.5 mm; depth 1.7 mm
✅ Material: high carbon steel; double shielded to keep contaminants out
✅ U-groove pulley design for stable, non-deviating sliding
✅ Pack size: 20 pieces per set

💡 What is a U groove ball bearing used for in small pulley systems and rail guides?

Handy for keeping shafts aligned in compact machinery. - Handy for fitness equipment, sewing machines, telecom gear - Supports low-load, slow-speed motion with stable guidance - Double-shielded design helps retain lubricant and keep out contaminants ✝️