I'm new to this forum. I have a South Bend 13.5 inch (I think) lathe which I bought from a guy who didn't know too much about it. I changed the motor to a 2hp 1725rpm Leeson single phase.
The lathe is great except that the carriage speed is too fast. The settings are all set to the slowest, yet this is still way to fast to get a smooth finish. If I set up for threading, the machine cuts right around double the speed of what the tag says. I thought maybe the 1725rpm was too fast, but the old 3-phase I pulled out was 1730, so that's not the problem.
I have a friend who told me there's another setting on these old lathes where you can drop everything to a lower gear, but I haven't been able to find it.
Can anyone shed some light?
The lathe is great except that the carriage speed is too fast. The settings are all set to the slowest, yet this is still way to fast to get a smooth finish. If I set up for threading, the machine cuts right around double the speed of what the tag says. I thought maybe the 1725rpm was too fast, but the old 3-phase I pulled out was 1730, so that's not the problem.
I have a friend who told me there's another setting on these old lathes where you can drop everything to a lower gear, but I haven't been able to find it.
Can anyone shed some light?