Saddle lock for South Bend Heavy 10

[N9WHH]

Thank you for all the replies, above. I apologize for any use of incorrect terminology.

I found a South Bend Micrometer Carriage stop, recently. I loosely fitted it onto the bed, and it appears to fit, but the stop pin does not fall on the boss of the carriage, where I assume that it should. I think it will work but am thinking that perhaps I need a bed mounting bracket, as shown in my attached illustration, above. See picture below.

 

[rwdenney]

That micrometer stop is for a different lathe, maybe a 9” or a 10-light. Were I you, I’d sell it and buy one designed for a 10-heavy.

Here’s a picture from the 1956 lathe catalog. You can see that the 9 and 10-light lathes used the same stop, but the 10-heavy used a different part.



The stop in the photo shows less reach to the apron boss—similar to the one in your picture—and it’s either a 9 or a 10-light by virtue of the single-wall apron. The 10-heavy will have a much wider dual-wall apron.

Rick “get the right part” Denney

 

[gard]

Saw this recently on practical machinist forum, a download on the SB forum from SWells I think, this stop involves drilling holes in the bed. I have never seen one in person. Seems to me mounting the stop directly to the bed instead of a bed mounting bracket is more versatile. I am guessing they had some reason not obvious to me (after a beer or 2).

 

[rwdenney]

Saw this recently on practical machinist forum, a download on the SB forum from SWells I think, this stop involves drilling holes in the bed. I have never seen one in person. Seems to me mounting the stop directly to the bed instead of a bed mounting bracket is more versatile. I am guessing they had some reason not obvious to me (after a beer or 2).
View attachment 500248

This bracket allows the micrometer stop to be positioned next to the headstock (up against the quick-change gear box) for the smaller lathes so one could work really close to the spindle without a chuck.

Rick “hasn’t ever needed the stop to overlap the QCGB” Denney

 

[G-ManBart]

This bracket allows the micrometer stop to be positioned next to the headstock (up against the quick-change gear box) for the smaller lathes so one could work really close to the spindle without a chuck.

Rick “hasn’t ever needed the stop to overlap the QCGB” Denney

Exactly. This does come in handy for certain operations. For example, if you're fitting a new chuck adapter plate and want to use the micrometer carriage stop to accurately turn/face the hub to fit into the back of the chuck the carriage will be where the carriage stop usually fits, so you use the bracket to move the carriage stop farther away and ta-da, you can dial in the depth/height you want perfectly. It's possible to do the same thing with an indicator and a magnetic mount, but it's a bit more cumbersome.

 

[SLK001]

Exactly. This does come in handy for certain operations. For example, if you're fitting a new chuck adapter plate and want to use the micrometer carriage stop to accurately turn/face the hub to fit into the back of the chuck the carriage will be where the carriage stop usually fits, so you use the bracket to move the carriage stop farther away and ta-da, you can dial in the depth/height you want perfectly. It's possible to do the same thing with an indicator and a magnetic mount, but it's a bit more cumbersome.

When I had to do something like this, I mounted the micrometer stop on the back prism. There's plenty of room back there without any gearbox bump.