Originally Posted by Hamzter  You mean attach the coupler directly onto the thread? I considered that but it could potentially slip, has anyone tried this? |
I used the Dumpster 1/2-10 single start ACME to 1/4" shaft couplers on my first machine, a modified Solsylva 25x37. Their ACME couplers have threaded brass inserts instead of just threaded holes in Delrin. They clamp onto the ACME threads quite tightly.
For my second build with 1/2-10 5 start lead screws I machined my own adapters to fit over the ACME threads, provide a shoulder for one side of a 1/2" ID bearing, and reduces to 1/4" shaft so that I can use a 1/4" to 1/4" coupler. The adapters have a machined collar and set screws for the other side of the bearing. The adapter is a snug fit to the ACME screw and a roll pin is inserted through the adapter and lead screw. I could have used something simpler and off-the-shelf from DumpsterCNC instead. I have their 5 start couplers on hand and will use them on a future project.
CarveOne