3D Printer Rigid Shaft Coupling 3mm To 4mm Bore, 20mm Length, 9mm Dia M3 Brass Shaft Coupler Connector, Copper Tone, Dope For DIY Robotics, Cars, Boats, CNC Machines, Includes 2 Couplings, 8 Screws, 2 Wrenches

Rigid Shaft Couplings for 3mm to 4mm Bore, 20mm Length
✔️ Brass rigid coupling with 3mm to 4mm bore, M3 screws, 2 pcs

These brass rigid shaft couplings join shafts in 3D printers, CNC machines, robotics, and DIY projects, offering high torque transmission with minimal play.

✅ Connection bore diameter: 3mm to 4mm
✅ Screw thread size: M3x0.5
✅ Total length: 20mm (0.79 inch)
✅ Outside diameter: 9mm (0.35 inch)
✅ Material: Brass
✅ Package: 2 couplings, 8 screws, 2 wrenches
✅ High torque, high rigidity, low inertia

💡 What is a shaft coupling and why choose a rigid brass coupling for small machinery? It’s handy for quick, solid shaft connections that minimize misalignment and transmit torque cleanly - Transfers torque between shafts with minimal backlash - Keeps shafts aligned in tight spaces, reducing vibration - Brass construction offers good conductivity and corrosion resistance

✝️