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And this is what's known as a single-tooth dog clutch. The shaft which drives it has a matching single large tooth, or "dog",
 and is allowed to slide into and out of engagement. The carriage has a rod, with sliding, adjustable stops specifically for this clutch.
When the carriage hits the stop collar, the rod is pushed over slightly, and a linkage disengages the geartrain. If you're simply turning a part,
you can have the feed stop automatically at a certain point, or if you're threading, the feed will also disengage at a certain point.

The working edges are worn somewhat, but not badly, considering the machine is over seventy years old.





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Information contained in these pages is for reference and entertainment purposes only.  Our methods are not always the best,
quickest, safest, or even the correct ones. It's up to you to know how to use your own machines and tools.
Keep your fingers away from the spinny blades o' death and you should be all right.