2 Pack Flexible Shaft Couplers 4 To 6 Mm Bore, 20 Mm Length, 15 Mm Diameter Aluminum Alloy Joint Connectors For Stepper Motors, 3D Printers, CNC Machines, DIY Encoders And Smooth Power Transmission

Two-Pack Aluminum Shaft Couplers for 4-6 mm Bores
✔️ Includes 2 pcs, 15 mm OD, 4-6 mm bore, 20 mm length, aluminum

These rigid shaft couplers connect two shafts to transfer torque in CNC machines, 3D printers, stepper motors, and DIY encoders, providing stable power transmission and helping maintain alignment under load.

✅ Outer diameter 15 mm (0.59 in)
✅ Inner bore 4-6 mm (0.16-0.24 in)
✅ Length 20 mm (0.79 in)
✅ Material: anodized aluminum alloy (heat and corrosion resistant)
✅ Groove design adds flexibility and reduces stress
✅ Clamping screws prevent sticking and ensure secure mounting

💡 What is a shaft coupling used for?

A handy way to connect two drive shafts and transmit torque while tolerating slight misalignment. - Transmits torque between shafts with alignment tolerance - Common in stepper motors, CNC machines, 3D printers, and DIY encoders - Clamping screws provide secure, slip-free mounting - Aluminum alloy bodies resist corrosion in workshop environments ✝️