Built Tough Aluminum Rigid Shaft Coupling Set Screw Connector For 5mm To Quarter Inch Drives Zero Flex Setup Right Up Your Alley For Cnc Builds 3d Printing And Stepper Motors Dark Blue 4 Pack Set

Heavy Duty Aluminum Shaft Coupling 4 Pack For CNC Machines
✔️ Bore 5mm to 1/4in, OD 18mm, Length 25mm, M4 bolts, alloy

This four pack snaps rotating shafts together without any wiggle room. You can drop these zero flex connectors onto stepper motors, 3D printers, DIY robots, and small blowers to move power cleanly.

✅ Housing width sits at 18mm plus 0.71inch to slide right into frames
✅ Accepts shafts measuring 5mm through 6.35mm or up to 1/4inch dia
✅ Body depth reaches 25mm near 0.98inch to keep panels clear
✅ Fastens down using standard M4 hardware sized at 3mm to 1/8inch

💡 How do zero flex motor couplers transfer torque without backlash?
- A rigid metal bridge locks your motor axis direct to the driven part
- Get everything squared away ahead of time since these handy links refuse to compensate
- Seat the screws firm enough to crush out deadplay before you run the stepper