Dope
Cast Iron
- Joined
- Jan 16, 2016
Hello friends,
I have a new-to-me 1938 Cincinnati 2MH with the universal/toolmaker's overarm.
I had to disassemble and reassemble the internals of the overarm, which took forever with shimming the bevel gears for backlash and wear pattern. But everything seems pretty good now, the machine works and cuts nicely. However, the surface finish is abysmal. I realize the machine likely has lots of wear so it's possible I'm just asking for too much here, but I figured I'd see if there's anything I can do. What I'm most concerned about is that there is a collar at the top of the vertical spindle that seems to allow you to preload the bearings. If I crank down on it a bit, the spindle is resistant to turning and stops immediately when power is removed, for example. Too loose, and I can move the spindle up and down slightly.
I'm guessing there is some procedure to setting the correct amount of preload, however after weeks of searching I'm not able to come up with any sort of manual for this. Anyone have any tips or pointers?
Also, as I was typing this, I realized that the main bearing around the spindle might just be trashed. I went over to the machine and the spindle does have the tiniest bit of movement side-to-side. I've got a long-reach facemill arbor on it right now so there's plenty of leverage to produce a little movement, by hand. Guessing this might be a more obvious solution than I originally realized?
Dope
I have a new-to-me 1938 Cincinnati 2MH with the universal/toolmaker's overarm.
I had to disassemble and reassemble the internals of the overarm, which took forever with shimming the bevel gears for backlash and wear pattern. But everything seems pretty good now, the machine works and cuts nicely. However, the surface finish is abysmal. I realize the machine likely has lots of wear so it's possible I'm just asking for too much here, but I figured I'd see if there's anything I can do. What I'm most concerned about is that there is a collar at the top of the vertical spindle that seems to allow you to preload the bearings. If I crank down on it a bit, the spindle is resistant to turning and stops immediately when power is removed, for example. Too loose, and I can move the spindle up and down slightly.
I'm guessing there is some procedure to setting the correct amount of preload, however after weeks of searching I'm not able to come up with any sort of manual for this. Anyone have any tips or pointers?
Also, as I was typing this, I realized that the main bearing around the spindle might just be trashed. I went over to the machine and the spindle does have the tiniest bit of movement side-to-side. I've got a long-reach facemill arbor on it right now so there's plenty of leverage to produce a little movement, by hand. Guessing this might be a more obvious solution than I originally realized?
Dope