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Commander_Chaos
02-16-2019, 10:12 AM
I'm shopping for another lathe and I'm largely ignorant of the larger South Bend machines. I've seen 10" toolroom and heavy 10 lathes for sale but I don't know the difference between them in terms of features, power, etc. Advice would be much appreciated, although with the exception of bed length, to me more is more :)

RB211
02-16-2019, 11:40 AM
I'm shopping for another lathe and I'm largely ignorant of the larger South Bend machines. I've seen 10" toolroom and heavy 10 lathes for sale but I don't know the difference between them in terms of features, power, etc. Advice would be much appreciated, although with the exception of bed length, to me more is more :)Think the Heavy 10 has a larger spindle through hole, don't quote me on that though.

Erich
02-16-2019, 12:15 PM
There may be a couple of places where a toolroom 10" has tighter tolerances.
The main difference is the toolroom lathes were equipped with most of the options like taper attachment, collet closer and collet rack.

J Tiers
02-16-2019, 02:28 PM
Think the Heavy 10 has a larger spindle through hole, don't quote me on that though.

It takes a 5C. I think the others only take a 3C, same as the 9".

I THINK it also has a generally thicker bed, but I may not be comparing the right units.

Waterlogged
02-16-2019, 02:40 PM
Tool room model came with additional accessories and was built to tighter tolerances.

quadrod
02-16-2019, 04:38 PM
While South Bend lathes are nice when in good shape, the back gears and gear train can be quite noisy at higher speeds when power feeding. A lathe with enclosed oil bath head stock will be quieter. The South Bend Heavy 10 is used by a lot of gun smiths due to the short head stock/spindle length. I have a South Bend 13 and like it except for the gear train noise.

tom_d
02-16-2019, 08:38 PM
There are a few versions of the 10" South Bend. The 10K is very close in appearance to the popular 9A. The "Heavy 10" series is, as the name implies, a larger heavier machine. Of the heavy tens there are two model designations to look for: the 10R and the 10L. The R version will have a 1 7/8 - 8 threaded spindle. The L version will have either a 2 1/4-8 threaded spindle nose, a D1-4 cam-lok spindle nose, or on rare occasions a long taper spindle nose. The 10L version is preferred, as the spindle's through hole is 1 3/8 and so with a spindle taper adapter will accept the common 5C collet sizes. Note that these spindle versions on the 10L are also found on the 13" lathes.

thaiguzzi
02-17-2019, 12:59 AM
What they said.
If you have the choice - Heavy 10 every time.
The 10k is basically a bigger 9A...

JRouche
02-17-2019, 02:14 AM
That is pretty cool you scored on a nice lathe.

The 10-11-12 and 13 inch southbends share the same head stock for the spindle. Meaning all spindles from the same time period would be the 5C spindle.

JR

JRouche
02-17-2019, 02:38 AM
There are a few versions of the 10" South Bend. .

Yes, I agree. I know someone that has onel :) JR

I have a small Emco.

Its neat though. Has eight stations for tools. No live toolooing yet though :) JR
https://www.youtube.com/watch?v=fP6hNCqlI_A. Many of them if needed. JR

big job
02-17-2019, 07:18 AM
All I can say is mine is as quiet as a cat......

morsetaper2
02-17-2019, 02:34 PM
There are a few versions of the 10" South Bend. The 10K is very close in appearance to the popular 9A. The "Heavy 10" series is, as the name implies, a larger heavier machine. Of the heavy tens there are two model designations to look for: the 10R and the 10L. The R version will have a 1 7/8 - 8 threaded spindle. The L version will have either a 2 1/4-8 threaded spindle nose, a D1-4 cam-lok spindle nose, or on rare occasions a long taper spindle nose. The 10L version is preferred, as the spindle's through hole is 1 3/8 and so with a spindle taper adapter will accept the common 5C collet sizes. Note that these spindle versions on the 10L are also found on the 13" lathes.

tom_d's explanation of diff between 10L & 10R is spot on. That said, you can transplant a 10L spindle onto a 10R machine to make it a 10L. That's what I did to my 10R. As I wanted that 5C capability.

Paul Alciatore
02-17-2019, 07:30 PM
This would be a good place for that question. And it is more friendly than the General Board on PM.

https://www.practicalmachinist.com/vb/south-bend-lathes/

If you search there you can probably find a reference to a SB catalog from the past that lists the features of the various models.