On Mon, 18 Oct 2021 at 06:12, Ralph Stirling <[email protected]> wrote: > > I need shorten the 32mm long 19mm diam shafts by 5mm.
Lots of good ideas, here are some less-preferred options: Find a way to power the motor on top of your lathe or milling machine ways, and turn the shaft down. It is possible to dismantle the motor and re-machine the shaft. Wrap the rotor in a couple of layers of plastic bags and tape, as the main difficulty is cleaning swarf off the magnets. Some motors lose their magnetism if dismantled, but I think this is less of a problem with rare-earth rotors. I needed to do this to shorten one of my servo motors (In this case I removed a whole layer of the motor, taking out a brake and the splines on the rotor) https://bodgesoc.blogspot.com/2015/12/a-start-on-controller.html 10th picture. To change the shaft diameter you can sometimes grip a rear shaft extension and put a centre in the output end, then turn down the shaft after arranging some way to prevent the motor body rotating. This is safe enough provided that there is no chance of the field winding wires making contact with each other. -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1912 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
