I acquired another Schaublin 70 recently, this is the plain bearing spindle model with the double taper at the inboard bearing - i think its 45 and 3 degrees. Previous hack operated with oil and the bearing seems really pooched, the owner was the type who was barely qualified to operate a lawn mower, not a fine machine tool, sad. Anyway, lamenting aside, there's scoring and it seems when you move the bearing all the way on the shaft, its still sloppy on the shaft - ie. there doesn't look like enough material to grind/lap it back in. afaik these are hardened and lapped steel bearings on a hardened and lapped shaft.
I'd be ok attempting to make a part with one taper, but getting two tapers and perfect mate via lapping is something I'm not sure how to do or even if i'm up to it. So making a replacement bearing seems iffy.
i'll contact Schaublin, but expect its an exercise.....if they have the part it'll likely be more than the lathe is worth in good condition. If thought of hard chroming the shaft, but then I'm back to 'how to lap a double angle conical bearing and its mate perfectly?"
The lathe is otherwise pretty good, so i'd like to save it over parting it out.
Any great ideas on solving this problem? Anyone converted one of these to roller element bearings?
I'd be ok attempting to make a part with one taper, but getting two tapers and perfect mate via lapping is something I'm not sure how to do or even if i'm up to it. So making a replacement bearing seems iffy.
i'll contact Schaublin, but expect its an exercise.....if they have the part it'll likely be more than the lathe is worth in good condition. If thought of hard chroming the shaft, but then I'm back to 'how to lap a double angle conical bearing and its mate perfectly?"
The lathe is otherwise pretty good, so i'd like to save it over parting it out.
Any great ideas on solving this problem? Anyone converted one of these to roller element bearings?