millwrong74
Plastic
- Joined
- Jun 9, 2018
My 13" SB lathe has a weird spindle size. The serial number is 64754, 13 1/4" swing and 5 ft bed.The cat. number is 186 B according to the serial tag at the time of manufacture.
Closest I can come to it's actual description is on page 19 here from a post here:
http://www.wswells.com/data/catalog/1934_cat_94/1934_cat_94.pdf
My lathe was shipped on 2/25/36, so I am assuming it is still a 1934 Model.?
By my own measurements the spindle OD is 1.86" on the tops of the threads. In between the threads it measures 1.75". The ID is 1.71" or 1.72" from a faceplate and thread protector which screws on.
Here's my question:
What size spindle do I have?
I know it's not 1 3/4" because 2 different backing plates it bought did not fit. Shars Tools told me it was a 1 7/8" spindle based on my measurements, the only problem with that is THERE AIN'T any of those... at least that I can find. The serial tag description I received from South Bend lathes historical records via Grizzly says the headstock is a number 7.
I'm trying to purchase a backing plate to mount a new 6" 4 jaw chuck on this spindle. I already have the new chuck which is a plain back. If I can't find a 6" diameter threaded backing plate with a 1 7/8" thread, my solution of last resort is to use the backing plate off my old 3 jaw chuck which is like 4" Diameter, make an adaptor plate from 3/8" thick steel to fit between the backing plate and the back of the 4 jaw. It's necessary because the 4 jaw mounting holes are at the very outside diameter and the threaded backing plate is only 4" diameter.
Is this lathe a complete one of a kind?
Common spindle sizes:
Lathe Chucks Technical Information | MSC Industrial Supply Co.
Closest I can come to it's actual description is on page 19 here from a post here:
http://www.wswells.com/data/catalog/1934_cat_94/1934_cat_94.pdf
My lathe was shipped on 2/25/36, so I am assuming it is still a 1934 Model.?
By my own measurements the spindle OD is 1.86" on the tops of the threads. In between the threads it measures 1.75". The ID is 1.71" or 1.72" from a faceplate and thread protector which screws on.
Here's my question:
What size spindle do I have?
I know it's not 1 3/4" because 2 different backing plates it bought did not fit. Shars Tools told me it was a 1 7/8" spindle based on my measurements, the only problem with that is THERE AIN'T any of those... at least that I can find. The serial tag description I received from South Bend lathes historical records via Grizzly says the headstock is a number 7.
I'm trying to purchase a backing plate to mount a new 6" 4 jaw chuck on this spindle. I already have the new chuck which is a plain back. If I can't find a 6" diameter threaded backing plate with a 1 7/8" thread, my solution of last resort is to use the backing plate off my old 3 jaw chuck which is like 4" Diameter, make an adaptor plate from 3/8" thick steel to fit between the backing plate and the back of the 4 jaw. It's necessary because the 4 jaw mounting holes are at the very outside diameter and the threaded backing plate is only 4" diameter.
Is this lathe a complete one of a kind?
Common spindle sizes:
Lathe Chucks Technical Information | MSC Industrial Supply Co.