sempersam

Well I broke down and did it, I bought a servo motor and I am in love. Running it through my homemade speed reducer (3" pulley on servo into an 8" pulley, then a 2" pulley out to the stock handwheel), I can adjust from extremely slow to faster than I'll ever use and it has enough power to cleanly sew 2 layers of 12 oz veg tan cleanly. Now time to play with needle/ thread size. There seems to be several good posts on that topic already in the archives so time to go browse some more. Thank you all for the info/advise/encouragement

thanks for the chart, it will be very usefull.

I didn't know that. I probably could have made a 1725rpm motor crawl, but if it had a low spd motor on it too begin with I probably wouldn't be able to convince myself to buy a servo motor when I redo the table next month. It turns out that this is the same model machine that my Dad learned to sew on in the Marine Corps.

the machine seems to run fine with this setup but the torque has most definitely increased. it has noticeably more power. I assumed it was okay but I have also been hesitant to put the machine though its paces since its ability far surpasses my skillset. thanks for the response I'll take her for a test ride this evening.

3450rpm motor with 2 in pulley to 10 in pulley, then my choices are 4 to 2 in, 3.5 to 3 in, 3 to 3.5, or 2 to 4 in..

I have a singer 111g156 that I've been modifying to meet my needs. Eventually I'll switch to a servo motor but for now it's a clutch motor(3450rpm). I made a speed reducer for it. The motor pulley is a 2in, it drives a 10in pulley that then drops to a 3speed pulley that came off an old craftsman lathe it goes to a matching 3 spd pulley that is mated to the hand wheel on the machine. I like my speed(s).. Now to the question, can I create too much torque? I don't want to damage my machine?