Flexible Aluminum Shaft Coupler 3mm To 4mm Bore 25mm Length 19mm Outer Diameter 2 Pack For 3D Printer CNC Machines Encoders And Motors DIY Projects Silver Ideal For Stepper Motor Linkages Encoder Feedback 3D Printer Upgrades CNC Projects Install

Rigid Aluminum Shaft Coupler 3-4 mm Bore, 25 mm Length
✔️ 3-4 mm bore, 25 mm length, 19 mm OD, 2-Pack, aluminum alloy

This flexible aluminum shaft coupler securely connects small torque shafts in hobby CNC setups, 3D printers, encoders, and DIY robots. Its spring-loaded design cushions deviations in diameter and angle, keeping motion smooth and aligned.

✅ Connection Bore Diameter: 3-4 mm (0.12-0.16 in)
✅ Total Length: 25 mm (0.98 in)
✅ Outside Diameter: 19 mm (0.75 in)
✅ Material: Aluminum Alloy; Color: Silver
✅ Package Content: 2 Pcs x Rigid Shaft Coupler; 1 Pcs x Hexagonal Wrench

💡 What is a shaft coupling used for in compact motion systems?

Handy, compact connector that links drive shafts to driven parts with tolerance for misalignment and small angular error.

- Transfers torque between motors and driven components safely - Reduces vibration and backlash in 3D printers, encoders, and CNC setups - Made from high-strength aluminum alloy for light weight and durability - Supports 3-4 mm bore shafts in small-diameter applications