[email protected]
Plastic
- Joined
- Apr 1, 2020
- Location
- Pretoria, Gauteng, South Africa
Hi guys, I'm new to this forum, new to forums in general and new to lathes, so please forgive any improprieties on my part.
I have a used 1937 9" 'Workshop' type 415Y – serial number 78661 (SB renamed these lathes to type 'C' later on). Bought it in March 2020 (pre covid lockdown) and have not used it yet. I am currently attempting to restore it. It has a very badly galled headstock spindle and bearings. The spindle is the 1 1/2" 8-thread one. These lathes were originally supplied with cast-iron bearings and 'soft' metal spindles. SB did offer a hardened spindle as an option on the 415, but I am relatively certain that mine is the soft version, looking at the damage (see photo's below). This was before they started fitting bronze bushings to the headstock bearings on later models. I found a used replacement for the spindle, which appears to be in good nick, and which I assume is also soft metal
My idea is to fit the 'new' spindle inside a Babbitt casting covering the existing bearings, but I am not sure how to make it work. The clearances between the spindle and bearings are probably too tight to allow pouring white metal without any pockets or irregularities getting formed because of the limited clearances? Also, these headstocks were made as one unit with the bearings bored out and ground and scraped to fit. They do not have top halves that can be removed, only a groove on one side for shims. Because of this I would have to cast the Babbitt with the headstock standing on its side.
I would like to do this myself and not have to go to a pro machine shop at enormous cost and inconvenience.
Is it a silly idea, or/and are there any other suggestions/solutions that could work?
Thanks in advance for any help you can offer
I have a used 1937 9" 'Workshop' type 415Y – serial number 78661 (SB renamed these lathes to type 'C' later on). Bought it in March 2020 (pre covid lockdown) and have not used it yet. I am currently attempting to restore it. It has a very badly galled headstock spindle and bearings. The spindle is the 1 1/2" 8-thread one. These lathes were originally supplied with cast-iron bearings and 'soft' metal spindles. SB did offer a hardened spindle as an option on the 415, but I am relatively certain that mine is the soft version, looking at the damage (see photo's below). This was before they started fitting bronze bushings to the headstock bearings on later models. I found a used replacement for the spindle, which appears to be in good nick, and which I assume is also soft metal
My idea is to fit the 'new' spindle inside a Babbitt casting covering the existing bearings, but I am not sure how to make it work. The clearances between the spindle and bearings are probably too tight to allow pouring white metal without any pockets or irregularities getting formed because of the limited clearances? Also, these headstocks were made as one unit with the bearings bored out and ground and scraped to fit. They do not have top halves that can be removed, only a groove on one side for shims. Because of this I would have to cast the Babbitt with the headstock standing on its side.
I would like to do this myself and not have to go to a pro machine shop at enormous cost and inconvenience.
Is it a silly idea, or/and are there any other suggestions/solutions that could work?
Thanks in advance for any help you can offer