Rigid Shaft Coupling 1-1/8 Inch Bore, 2-1/8 Inch Outer Diameter, 3 Inch Length With Two Set Screws, Black Oxide 1045 Steel Coupler For 3D Printers, Motors And Wheels, Built Tough, Precise Fit

Rigid 1-1/8 Bore Shaft Coupling, single unit, precise torque
✔️ 1-1/8 in bore, 2-1/8 in OD, 3 in long, 2 set screws

This rigid shaft coupling is a compact, heavy-duty connector that links two shafts to transmit rotational torque. It’s commonly used in motors, 3D printers, drive wheels, and other small machinery where a precise, secure connection is critical.

✅ Bore: 1-1/8 in (28.6 mm)
✅ Outer diameter: 2-1/8 in (53.8 mm)
✅ Length: 3 in (76.2 mm)
✅ Two set screws for secure, precise connection
✅ Material: 45# steel with black oxide coating for corrosion resistance

💡 What is a shaft coupling used for in a basic drive system?

- transfers torque between motors, shafts, and wheels
- handy for aligning two shafts and reducing vibration in small drives
- durable 45# steel with black oxide coating for corrosion resistance and long life