Motor-to-Gearbox Drives
NM couplings between motors and gearbox input shafts.
A motor-to-gearbox coupling must match two defined shaft interfaces. The gearbox input shaft and motor shaft should be specified separately, while the machine behind the gearbox determines the service duty.
What to include in the application RFQ
| Item | What to confirm |
|---|---|
| Motor shaft | Diameter, keyway, speed and available hub length. |
| Gearbox input | Input shaft diameter, keyway and mounting envelope. |
| Driven machine | Conveyor, mixer, pump, fan or other load after the gearbox. |
| Service | Starts per hour, reversing and shock loading where present. |
Where an NM coupling fits
NM couplings are often suitable for compact motor-to-gearbox connections where a resilient element is preferred. Confirm enough axial room for both hubs and the element before finalizing the bore machining.
Replacement and installation notes
For replacement work, include the existing coupling marking, photos and measurable hub dimensions. For new installations, provide the shaft drawing or actual shaft dimensions. Align the connected equipment to the machine manufacturer’s requirements before operation.
Request an NM Coupling Quote
Send the NM size if known, both shaft diameters, operating speed, driven equipment and quantity. Add a drawing or photos for replacement work.
