Rotatable 8mm to 8mm Universal Joint Coupling Shaft 35mm Long for 3D Printers CNC Machines and Stepper Motors, With M4 Screws, 2 Pack, Great for DIY Encoders, RC Robots, and Boat Shaft Transmissions

Rotatable 8mm to 8mm Universal Joint Coupling Shaft - 2-Pack
✔️ 8mm to 8mm joint, 14mm OD, 35mm long, M4 screws included

This 2-pack universal joint coupling connects two 8mm shafts securely, enabling torque transfer in tight spaces. Commonly used in servo motors, 3D printers, CNC machines, DIY encoders, spindle transmissions, and RC boat shaft transmissions. Includes M4 fastening screws for easy mounting.

✅ Size: 8mm to 8mm (0.31" to 0.31"), OD 14mm (0.55"), length 35mm (1.38")
✅ Material: nickel-plated 45# steel for high strength and corrosion resistance
✅ 360° rotation with internal rollers and cross bearings for smooth operation
✅ Compensates axial and radial offset; reduces shock and vibration
✅ Pack: 2 pcs universal joint coupling with M4 screws included

💡 What is a universal joint shaft coupling used for in small mechanical systems?

This handy connector keeps drive trains smooth and aligned when shafts aren’t perfectly inline. - Handy for hobby robotics and DIY CNC setups - Transmits torque while damping vibration in tight spaces - Works with 8mm to 8mm shafts and M4 mounting screws - Nickel-plated steel offers corrosion resistance for longer life ✝️