Hi all, I've got a '33 SB 11" underdrive lathe with a quick change gearbox that's working fine. I have been thinking about upgrading its 1150 RPM 1/2HP motor with something capable of providing higher spindle speeds and perhaps more power. My lathe tops out at about 550 RPM and other SB lathes of the era (both smaller and larger) have spindle speeds as high as 1357 RPM. Since I'm using it for work smaller than what SB designers may have considered "usual" for an 11" machine, I'm wondering if the there's anything I can do to ramp up the speed a bit.
I realize there are likely bottle necks in the lathe's drive line (belt, bushings and gearbox?) and I'm wondering how severe they are.
Anybody have any experience doing something like this? Good idea? Bad idea?
Thanks,
Peter