uxcell LM4UU Linear Ball Bearings 4mm Bore 8mm OD 12mm Length for CNC Machine 3D Printer 4pcs Size:4mm Jewelry making

Jewelry making

Spiral construction avoids shadow marks and provides smooth cutting action

Pilot Diameter 17/32"

Christmas crafts and DIY

uxcell LM4UU Linear Ball Bearings 4mm Bore 8mm OD 12mm Length for CNC Machine 3D Printer 4pcs Size:4mm Jewelry makinguxcell LM4UU Linear Ball Bearings 4mm Bore 8mm OD 12mm Length for CNC Machine 3D Printer 4pcs Linear motion bearings provide freedom of movement in a single direction. Often used in conjunction with cylindrical shaft or rail. The steel ball is in point contact with the shaft and rotates with very little frictional resistance, so as to obtain smooth movement with high precision. Linear Ball Bearing Motion Slide Units Grease may be applied prior to use