4 Piece Shaft Collars For SBR20 20mm Bore 40mm OD 12mm Thick Aluminum Locking Collars Clamp On With M5 Set Screws Anodized Linear Rail Stop For CNC And Linear Motion Systems

Four-Piece Aluminum Shaft Collars for SBR20 20mm Bore
✔️ 4x bore 20mm, 40mm OD, 12mm thick, aluminum collars with M5 screws

These four locking shaft collars are designed for SBR20 rails (20mm bore, 40mm OD, 12mm thick). They clamp securely onto shafts in CNC machines, 3D printers, and linear motion setups to keep components aligned and stop travel where needed.

✅ Material: Aluminum alloy, anodized silver surface
✅ Fit: SBR20 20mm bore, 40mm OD, 12mm thick
✅ Clamp: M5 set screws prevent shaft damage while holding tight
✅ Pack: 4-piece value pack for DIY projects

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

- Provides secure shaft positioning to prevent slip during operation - Keeps components aligned on SBR20 rails for repeatable results - Quick clamp-on install with M5 screws for easy adjustments