Four Piece Flexible Couplings 5mm To 7mm Bore Aluminum Alloy Shaft Couplers 15mm Diameter By 20mm Length For 3D Printer CNC Machines Motors Encoders DIY Projects Super Easy Setup

Aluminum shaft couplers, 5-7mm bore, 4-pack for CNC
✔️ 0.59 x 0.79 in (15 x 20 mm) dia x L, bore 5-7 mm, 4 pcs

These four flexible shaft couplers connect motors to shafts in 3D printers, CNC machines, and automation systems. The premium aluminum alloy keeps them strong yet lightweight, resisting corrosion for long-term reliability in both DIY projects and professional setups.

✅ 15x20mm dia x 20mm length, bore 5-7mm, aluminum alloy
✅ Helical cut design compensates angular, parallel, and axial misalignment
✅ Lightweight, corrosion-resistant aluminum for smoother operation
✅ 4-piece pack, easy to mount on standard stepper motors
✅ Set screws on both sides require even tightening during install

💡 What is a flexible shaft coupling used for in CNC machines and 3D printers? It helps reduce misalignment and vibration, extending the life of motors and bearings.

- Improves motion smoothness and reduces noise in drive trains - Protects motors and bearings by dampening shocks and misalignment - Easy to install with set screws on both sides and proper alignment - Works with 5-7mm bore and 15x20mm couplers for DIY setups