WM210V cross-slide NEMA 17 motor mount (belt drive)

thingiverse

Mount for WM210 mini lathe cross-slide stepper motor with 15 and 45 teeth pulleys for 3:1 reduction. Other parts needed: - htd 3m 45t 10mm BF Pulley bore ø8mm (modified: turned town, drilled and tapped 3x m3, keyway filed in) - htd 3m 15t 10mm K Pulley bore ø5mm - htd 3m 58t (174) 9mm belt - 2x m6x80 cylinder head screws (opted for full length screws for a lot more strength + rigidity; hat to tap the crosslide about 3 more mm; verify needed screw length for your lathe) - diverse m3 cylinder head screws + washers - 1x 608z 8x22x7 ball bearing (exchanging it for a 708AC angular contact bearing would be the right way to do it i guess, but i didn't have any on hand) - 2x 8x16x5 axial bearings (1x if using 708AC) - 4x 6mm ø1,5mm dowel pins (optional) - 3x m3 threaded inserts (4,2mm diameter) - 1x nema17 stepper up to 60mm - a few parts that came from the original hand wheel assembly (key, m8 nut, m8 washer, adjustable scale spring, crank) A dial for a cross-slide lead screw of 1.0mm (2.0mm dial) and 1,25mm (2,5mm dial) is provided, as well as a blank version. The pulley STLs are provided, although I'd recommend using metal ones. If you want to upgrade so a metal pulley later, I recommend printing the Handwheel and pulley separately, and securing them with m3 screws and inserts. Alternatively, a one piece STL is also provided. Do not forget to put a washer between the 45t pulley and the ball bearing, as per the cutaway image. I would recommend securing the stepper with 4 screws. For the top one, you would need to remove the pulley after tensioning. I used a countersunk m3 screw with a washer for a flush fit that doesn't interfere with the pulley. You can also fit a metal shim between the back of the stepper and your lathes' apron for better heat dissipation and rigidity. Since the position of the apron can vary from lathe to lathe, you'd have to figure out the measurements for your machine. The housing can get a fair bit of heat from the stepper, a temperature resistant filament is highly recommended. The other parts should be fine in regular PLA. See it in action here: https://youtu.be/i7XNa8Kxmfk Models updated on 2023.07.01