开云体育

ctrl + shift + ? for shortcuts
© 2025 开云体育

quick change gearbox questions


 

Periodic maintenance begets upgrades, as they do.? I've had my 1926 9" workshop(?) model B 4 foot for about eight years, and have been upgrading things as needed. I'm thinking that I might take the quick change gearbox plunge. I'm not restoring the lathe, so originality isn't a concern - only compatibility and function.

Which QC boxes fit this lathe? I think that the ones up through the 30s fit, but I'm unsure.

I looked for a cross-referance/interchange chart for the different generations & models; looked at catalogs, forums, advertisements and anything even remotely related to what parts from later lathes can be fitted to the 20s-era ones.

I never use the last foot of lathe bed, so could get by with shortening the lead screw if I can't find the appropriate one.

Any guidance is appreciated. If you have one for sale, let me know. I"m fine if it needs to be cleaned or refurbished. I enjoy doing it.

Neil
In case I'm mis-labeling my lathe, here are photos from the last time it was clean - when I built the table for it in 2017. The table is more colorful now, but too dirty & cluttered to get good photos.





 

开云体育

If anything I believe you would be shortening the lead screw . DO ya by chance have a copy of the illion rebuild book ?? That show's pretty good pic's of how it all fit's together . I think if ya were to ask over? on the Practical Machinist South Bend forum ya may find some folks that have done exactly what yer askin . The forum is free to join .Good luck & keep us posted .?

animal

On 4/23/24 4:33 PM, Neil Hitze wrote:

Periodic maintenance begets upgrades, as they do.? I've had my 1926 9" workshop(?) model B 4 foot for about eight years, and have been upgrading things as needed. I'm thinking that I might take the quick change gearbox plunge. I'm not restoring the lathe, so originality isn't a concern - only compatibility and function.

Which QC boxes fit this lathe? I think that the ones up through the 30s fit, but I'm unsure.

I looked for a cross-referance/interchange chart for the different generations & models; looked at catalogs, forums, advertisements and anything even remotely related to what parts from later lathes can be fitted to the 20s-era ones.

I never use the last foot of lathe bed, so could get by with shortening the lead screw if I can't find the appropriate one.

Any guidance is appreciated. If you have one for sale, let me know. I"m fine if it needs to be cleaned or refurbished. I enjoy doing it.

Neil
In case I'm mis-labeling my lathe, here are photos from the last time it was clean - when I built the table for it in 2017. The table is more colorful now, but too dirty & cluttered to get good photos.





 

I can tell you how I handled this situation. I sold my lathe and bought a 9A. The price I got for my old one and the price I paid for the 9A with a GCGB was a lot less than the cost of a GCGB not including the time to fit it. Plus a 9A has auto crossfeed.


 

Have you considered an electronic leadscrew?


 

开云体育

Doesn't the B also have power crossfeed ?

animal

On 4/24/24 8:25 AM, Mike Poore wrote:

I can tell you how I handled this situation. I sold my lathe and bought a 9A. The price I got for my old one and the price I paid for the 9A with a GCGB was a lot less than the cost of a GCGB not including the time to fit it. Plus a 9A has auto crossfeed.


m. allan noah
 

You don't have a workshop lathe, you have the older, heavier, wide-bed 'Series O' 9" lathe. In the late 30's, this lathe was improved (Series R, S, T etc) and had its swing raised to make the Heavy 10 (aka 10R and 10L). My understanding (though I have not measured it), is that the location of the leadscrew was moved away from the bed during these updates, so the Heavy 10 gearbox will not work. You would need a gearbox from a similar era 9", which unfortunately looks really similar to the Heavy 10.

On Tue, Apr 23, 2024 at 7:33?PM Neil Hitze via <nebenco=[email protected]> wrote:
Periodic maintenance begets upgrades, as they do.? I've had my 1926 9" workshop(?) model B 4 foot for about eight years, and have been upgrading things as needed. I'm thinking that I might take the quick change gearbox plunge. I'm not restoring the lathe, so originality isn't a concern - only compatibility and function.

Which QC boxes fit this lathe? I think that the ones up through the 30s fit, but I'm unsure.

I looked for a cross-referance/interchange chart for the different generations & models; looked at catalogs, forums, advertisements and anything even remotely related to what parts from later lathes can be fitted to the 20s-era ones.

I never use the last foot of lathe bed, so could get by with shortening the lead screw if I can't find the appropriate one.

Any guidance is appreciated. If you have one for sale, let me know. I"m fine if it needs to be cleaned or refurbished. I enjoy doing it.

Neil
In case I'm mis-labeling my lathe, here are photos from the last time it was clean - when I built the table for it in 2017. The table is more colorful now, but too dirty & cluttered to get good photos.






--
"well, I stand up next to a mountain- and I chop it down with the edge of my hand"


 

开云体育

Correct. I guess we need to know if they made a QCGB for his older model. Otherwise, he will need to make one from another model fit.

On 4/24/2024 2:13 PM, mike allen via groups.io wrote:

Doesn't the B also have power crossfeed ?

animal

On 4/24/24 8:25 AM, Mike Poore wrote:
I can tell you how I handled this situation. I sold my lathe and bought a 9A. The price I got for my old one and the price I paid for the 9A with a GCGB was a lot less than the cost of a GCGB not including the time to fit it. Plus a 9A has auto crossfeed.


 

On Wed, Apr 24, 2024 at 08:25 AM, Mike Poore wrote:
I can tell you how I handled this situation. I sold my lathe and bought a 9A. The price I got for my old one and the price I paid for the 9A with a GCGB was a lot less than the cost of a GCGB not including the time to fit it. Plus a 9A has auto crossfeed.
Mine has power crossfeed. I have significant space constraints, so even at 4' this lathe's size is perfect. I do still keep an eye on the local market, and there have been some good ones, but they've been larger ones that I don't have space for. Time fitting (or even restoring if necessary) is not a concern. I enjoy that sort of work.

Neil


 

开云体育

I have a 4ft 9a with qcgb and it has power? cross feed, like all 9a lathes. I think I Paid $1,100. A qcgb on ebay is $350.?

You can sell your lathe and buy a replacement and out of pocket you might be out less than the price of a gearbox.?

I am not adding the time and effort for the conversion, because I figured you work cheap for yourself.

The original advice was spot on. Sell and upgrade. Keep your tooling.?

Get


From: [email protected] <[email protected]> on behalf of Neil Hitze <nebenco@...>
Sent: Tuesday, May 7, 2024 1:06:25 AM
To: [email protected] <[email protected]>
Subject: Re: [SouthBendLathe] quick change gearbox questions

On Wed, Apr 24, 2024 at 08:25 AM, Mike Poore wrote:
I can tell you how I handled this situation. I sold my lathe and bought a 9A. The price I got for my old one and the price I paid for the 9A with a GCGB was a lot less than the cost of a GCGB not including the time to fit it. Plus a 9A has auto crossfeed.
Mine has power crossfeed. I have significant space constraints, so even at 4' this lathe's size is perfect. I do still keep an eye on the local market, and there have been some good ones, but they've been larger ones that I don't have space for. Time fitting (or even restoring if necessary) is not a concern. I enjoy that sort of work.

Neil


 

On Wed, Apr 24, 2024 at 09:57 AM, sapark123321 wrote:
Have you considered an electronic leadscrew?
I have considered adding an electric motor with a variable speed, but anything more is beyond my abilities. I have a lot of skills, but electronics is not one of them.

Neil


 

开云体育

Somebody on this list added a rocketronix leadscrew and loved it. I don't remember who, and I am not 100% sure of the spelling, but at 1 am I am not googling anything?

Get


From: [email protected] <[email protected]> on behalf of Neil Hitze <nebenco@...>
Sent: Tuesday, May 7, 2024 1:15:49 AM
To: [email protected] <[email protected]>
Subject: Re: [SouthBendLathe] quick change gearbox questions
?
On Wed, Apr 24, 2024 at 09:57 AM, sapark123321 wrote:
Have you considered an electronic leadscrew?
I have considered adding an electric motor with a variable speed, but anything more is beyond my abilities. I have a lot of skills, but electronics is not one of them.

Neil