Rigid Shaft Coupling for 3D Printers and Motors, 1/2 Inch Bore, 1 Inch OD, 1-1/2 Inch Length, Black Oxide Coated ASTM1045 Steel, Four Set Screws, Durable 4-Screw Blackened Coupler

Heavy-duty shaft coupling for printers and motors (single)
✔️ 1/2-in bore, 1-in OD, 1.5-in length, 4 set screws, ASTM1045 steel

This rigid shaft coupling connects two shafts to transmit torque in 3D printers, CNC motors, pumps, and other rotating equipment. Built from 45# steel with a black oxide finish, it resists corrosion for long-lasting performance.

✅ Bore: 1/2 in (12.7 mm); OD: 1 in (25.4 mm); length: 1.5 in (38.1 mm) with four set screws
✅ Material: 45# steel with black oxide coating for corrosion resistance
✅ Four-screw set design provides secure grip and precise alignment
✅ Applications: motors, pumps, generators, and drive assemblies for torque transfer

💡 What is a rigid shaft coupling with a 1/2 inch bore used for in small hobby machines?

It's handy for linking two shafts while preserving alignment and torque transfer in compact setups.

- Handy for connecting motors to drives in 3D printers and small CNCs
- Improves alignment and reduces backlash for smoother operation
- Works with 1/2 in bore and 1 in OD shafts in tight spaces
- A solid choice for hobby robotics and DIY automation projects