4 Pcs SBR20 Linear Rail Shaft Stop Collars Aluminum Alloy Shaft Lock Down Rings With Set Screw Bore 20mm OD 40mm Thickness 12mm CNC Parts For Precise Shaft Positioning

Precise 4-Piece SBR20 Shaft Stop Collars for CNC systems
✔️ 4 pcs aluminum shaft collars, bore 20mm, OD 40mm, 12mm thick

These stop collars clamp onto SBR20 linear rails to fix and align shafts, ensuring accurate positioning in CNC machines, engraving setups, and 3D printers. Built from aluminum alloy with steel components for strength and corrosion resistance.

✅ Precise shaft positioning for repeatable CNC alignment
✅ Easy clamp-on installation with a simple set screw
✅ Durable aluminum alloy and steel construction resists oxidation
✅ Compatible with transmission products, linear rail modules, engraving machines

💡 What is a shaft stop collar used for in CNC machines and linear rail setups?

Handy for keeping shafts fixed and aligned in motion systems.

- precise shaft positioning for reliable machine runs
- quick installation on 20mm bores without heavy tools
- improves repeatability in CNC, engraving, and linear rail setups