6Pack Treehobby Aluminium Alloy Shaft Coupling Rigid Stepper Motor Wheel Coupler Joint Connector for DIY Car Boat Airplane 3D Printers, 5mm to 8mm

6-Pack Aluminum Alloy Shaft Couplers 5-8mm for DIY Printers & Robots
✔️ 6pcs 5-8mm shaft couplers in blue aluminum alloy with 24 M4 screws

These rigid aluminum shaft couplers are handy for connecting motors to drive shafts and joining shafts of different diameters in DIY projects like 3D printers, robotics, and model builds.

✅ Outer diameter 14 mm, length 25 mm (0.55 in x 0.98 in)
✅ Connection range 5-8 mm shafts (0.197-0.315 in)
✅ Through angle 180 degrees to absorb misalignment
✅ Material aluminum alloy, blue finish; weight ~26.5 g per piece
✅ Includes 6 couplers, 24 M4 screws, and 1 hex wrench
✅ Thread size M4 for mounting and compatibility

💡 What is a shaft coupling used for in DIY 3D printers and robotics?

They are handy connectors that join shafts of different sizes and transmit torque while tolerating small misalignments.

- They are handy for connecting motors to drive shafts in compact setups - They allow slight misalignment without stressing bearings or shafts - They’re ideal for 3D printers, robotics, and hobby machines - This kit supports 5-8 mm shafts with M4 mounting hardware