Three Pack 3.17mm to 4mm Rotatable Universal Shaft U Joint Coupler for Motors, 3D Printers, and CNC Machines Easy DIY Hex Shaft Connector for Robotics and DIY Projects
✔️ 3-pack, M3 thread, 3.17-4.0mm ID, 23mm L (0.91 in), 9mm OD (0.35 in), nickel-coated
This three-pack rotatable universal shaft coupler connects motor shafts to hex wheels or drive gears in robotics, DIY projects, RC models, and hobby CNC setups. Nickel-coated iron makes it durable for repeated use.
✅ Nickel-coated iron universal joint coupling, sturdy and durable
✅ Inner diameter accommodates 3.17-4.0mm shafts (0.125-0.1575 in)
✅ Length 23 mm (0.91 in); Outer diameter 9 mm (0.35 in)
✅ M3 thread fitment for motor shafts and hex wheels
✅ Includes 1 M4 hex wrench and 6 fastening screws
💡 What is a common use for a rotatable universal joint shaft coupler in hobby projects? In quick terms, it lets you connect a motor shaft to a hex wheel or drive gear while allowing slight misalignment, handy for RC, 3D printing, and DIY CNC builds. - Handy for motor-to-shaft connections in tight spaces - Works with 3.17-4.0 mm shafts and M3 mounting - Rotatable design eases alignment and reduces binding - Includes three couplers and hardware for quick setup
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