40mm By 55mm Aluminum Flexible Shaft Coupling With 15 To 20mm Bore Zero Backlash High Torque Plum Elastomer For 3D Printers CNC Machines And Servo Stepper Motors

40x55mm aluminum flexible shaft coupling with 15-20mm bore
✔️ 40x55mm aluminum housing, 15-20mm bore, single-piece, zero-backlash, high torque

This 40x55mm aluminum flexible shaft coupling connects motors to shafts in compact builds like 3D printers, CNC machines, and servo/stepper systems. It uses a plum blossom elastomer to absorb vibration, resist oil, insulate electrically, and operate from -20 to 80 C. The zero-backlash design ensures precise torque transfer under light loads.

✅ Size: 40 mm diameter, 55 mm length; bore 15-20 mm
✅ Material: aluminum body with plum elastomer insert
✅ Zero-backlash torque transmission under low torque conditions
✅ Torque capacity exceeds traditional claw couplings by over 2x
✅ Oil resistance and electrical insulation; operating -20 to 80 C

💡 What is a flexible shaft coupling used for in hobby CNC machines and 3D printers?

A handy explanation of why folks pick these couplings for precise torque transfer and vibration damping.

• Absorbs vibration and compensates for minor misalignment in compact setups
• Delivers reliable torque transfer with low backlash across small drives
• Durable aluminum housing and plum elastomer resist oil and heat (-20 to 80 C)
• Fits 15-20 mm bore shafts common in printers and CNC gearboxes