- Joined
- May 4, 2014
- Messages
- 30
Good afternoon folks! I haven't been around for awhile but I've been moving my household and shop from California to Oklahoma. It;s taken me a couple of years but I'm finally making chips again. I have a South Bend 13 X 40 lathe from WW II. I know there is a lot of wear in the machine but the machine was free to me.
I've done a lot of turning, facing and boring since I've owned the machine and I feel I'm ready to learn how to thread. This is where the machine will not cooperate with me. It will not track properly. I'm trying to cut 1/2" - 20 threads and the first pass looks OK and measures OK with a pitch gauge but when I go for a second pass I'll engage the 1/2 nuts on the #3 & it will just rip the existing threads to bits.
I know the gears in the single lever quick change gearbox are worn out. The 1/2 nut is new though. the gear train between the head stock and the quick change are a little sloppy also. the lead screw has some wear too, how much I don't know.
I guess it's time to rebuild the QC gear box. Can you guys turn me on to where I can purchase new gears? Bushings and shafting I can make with the exception of the splined shafts. Also is there any way to determine wether the QC gears are at fault or the power train gear set between the head stock and the QC box?
Thanks in advance for any help you experts may pass on
I've done a lot of turning, facing and boring since I've owned the machine and I feel I'm ready to learn how to thread. This is where the machine will not cooperate with me. It will not track properly. I'm trying to cut 1/2" - 20 threads and the first pass looks OK and measures OK with a pitch gauge but when I go for a second pass I'll engage the 1/2 nuts on the #3 & it will just rip the existing threads to bits.
I know the gears in the single lever quick change gearbox are worn out. The 1/2 nut is new though. the gear train between the head stock and the quick change are a little sloppy also. the lead screw has some wear too, how much I don't know.
I guess it's time to rebuild the QC gear box. Can you guys turn me on to where I can purchase new gears? Bushings and shafting I can make with the exception of the splined shafts. Also is there any way to determine wether the QC gears are at fault or the power train gear set between the head stock and the QC box?
Thanks in advance for any help you experts may pass on