Flexible Coupling Shaft 16mm To 19mm Bore, 51mm Long, 44mm Outer Diameter, 5mm To 6mm Slot Width, Motor Coupler Joint For Servo And Stepper Motors, Encoders And CNC DIY Builds, 45 Steel

Flexible motor coupling shaft for CNC and servo drives
✔️ Bore 16-19mm, L 51mm, OD 44mm, slot 5/6mm, M6×1

The coupling shaft is a flexible connector made from 45# steel designed to link servo motors, stepper motors, encoders, and other drive components. It's a handy choice for CNC builds, automation projects, and DIY motion systems where smooth torque transfer and reduced drive stress are important.

✅ Bore: 16-19mm (0.63-0.75 in)
✅ Length: 51mm (2.01 in)
✅ Outside diameter: 44mm (1.73 in)
✅ Slot width: 5mm or 6mm (0.2/0.24 in)
✅ Thread size: M6×1
✅ Material: 45# steel, color black; Package: 1 x coupling shaft

💡 What is a flexible motor coupling shaft used for in hobby CNC and automation projects? It’s handy for connecting motors to components while absorbing misalignment and shock. - absorbs misalignment and torsional stress between motor and driven parts - enables smooth torque transfer for servo, stepper, and encoder systems - works with 16-19mm bore and M6×1 mounting for easy DIY assembly - ideal for CNC builds, hobby robots, and automation tasks