a3ntin
Plastic
- Joined
- Jan 19, 2022
- Location
- Italy, Treviso
English is not my first language, so i will do my best.
This is my first post on this forum, i can't found information anywhere in the web. Sometimes i read discussions in this forum and they are a big help for me, i hope this time can be the same.
So, some weeks ago i've bought an old, rusty and mistreated spinning lathe from a scrapyard, and i would restore it to working condition.
The lathe seems to be some frankenstein machine, maybe assembled by someone using various part from other machines. The headstock and the tailstock seems to be original, only the pulley on spindle shaft appears to be modified to accommodate new (badly made) motor support. For the bed i'm not sure, but it pairs well with tailstock, and the headstock is just bolted on it. The legs are very different one to the other, i don't know which one of these is original or none of them.
Summing up: it's a mess, but seems it can be easy fixed. But this mess cause me some doubts.
The spindle shaft, as i said, already suffered some repairs e modification from non expert person, and i try to find whats wrong o right in this modification.
The main problems is about bearings. Actually the machine mount one double-row angular contact ball bearings near the spindle (the bigger one) and one self-aligning ball bearings on the rear of the shaft (the smaller one). The actual baring are burnt and broken in some point, they were clearly abused.
From my small knowledge of machine tool, and seeing the actual state of bearing i start to thinking that someone put the wrong bearings on this machine.
Considering the forces involved (spinning diameter up to 700mm) it wouldn't be correct put in it some tapered roller bearing?
The shaft configuration already have bearing lock nuts for preload, and i can find roller bearing with same measure of ball bearing.
Is there anybody in this forum that have or have seen a spinning lathe and know what type of bearing normally mount?
I send some photo of the machine and the shaft.
Sorry for my English and thanks,
Andrea Trentin.
This is my first post on this forum, i can't found information anywhere in the web. Sometimes i read discussions in this forum and they are a big help for me, i hope this time can be the same.
So, some weeks ago i've bought an old, rusty and mistreated spinning lathe from a scrapyard, and i would restore it to working condition.
The lathe seems to be some frankenstein machine, maybe assembled by someone using various part from other machines. The headstock and the tailstock seems to be original, only the pulley on spindle shaft appears to be modified to accommodate new (badly made) motor support. For the bed i'm not sure, but it pairs well with tailstock, and the headstock is just bolted on it. The legs are very different one to the other, i don't know which one of these is original or none of them.
Summing up: it's a mess, but seems it can be easy fixed. But this mess cause me some doubts.
The spindle shaft, as i said, already suffered some repairs e modification from non expert person, and i try to find whats wrong o right in this modification.
The main problems is about bearings. Actually the machine mount one double-row angular contact ball bearings near the spindle (the bigger one) and one self-aligning ball bearings on the rear of the shaft (the smaller one). The actual baring are burnt and broken in some point, they were clearly abused.
From my small knowledge of machine tool, and seeing the actual state of bearing i start to thinking that someone put the wrong bearings on this machine.
Considering the forces involved (spinning diameter up to 700mm) it wouldn't be correct put in it some tapered roller bearing?
The shaft configuration already have bearing lock nuts for preload, and i can find roller bearing with same measure of ball bearing.
Is there anybody in this forum that have or have seen a spinning lathe and know what type of bearing normally mount?
I send some photo of the machine and the shaft.
Sorry for my English and thanks,
Andrea Trentin.