Flexible Shaft Coupling Aluminum Anodized Hub for Servo and Stepper Motors, OD 20mm, Length 25mm, Bore Range 6.35mm to 8mm, H7 Precision Fit Verified by Plug Gauges, Durable DIY Robotics Coupler for Smooth, Stable Power Transmission

Aluminum 20mm OD Flexible Shaft Coupling for Servo and Stepper
✔️ Anodized aluminum hub, bore 6.35 to 8 mm, single unit, H7 fit

This compact coupling links servo or stepper motors to drive shafts in small CNC machines, 3D printers, and robotics projects. Its combination of anodized aluminum hubs and a polyurethane spider provides reliable torque transfer with vibration damping in tight spaces.

✅ Bore sizes 6.35mm to 8mm with H7 precision fit
✅ OD 20mm, length 25mm for compact drives
✅ Anodized aluminum hubs resist corrosion and keep weight down
✅ Polyurethane spider insert rated 98 Shore A for quiet, smooth operation

💡 What is a flexible shaft coupling used for in small CNC machines and robotics?

This handy guide explains how these couplings improve motion control in compact systems.

- handy for aligning shafts and absorbing small misalignments - reduces vibration and noise while transferring torque - helps extend bearing life by damping resonance in fast-moving axes - great for DIY robotics, 3D printers, and compact automation