Originally Posted by steve323  A cheaper alternative is the Lovejoy connectors from Enco at about $8 for 2 hubs and a spider. This option also allows you to easily join 1/4" stepper motor shafts with 3/8" or 1/2" screws.
Steve |
But Lovejoy types may not start out Zero backlash, and will add backlash as the spiders wear. Helical couplings are the best of both worlds: Solid, so zero backlash, and yet flexible. Flexible couplings still need to be REASONABLY close to alignment though.
CR.