Dirt Cheap Automatic Tailstock Feed for Your Metal Lathe

[Toolmaker51]

In mold making, especially deep cavities, this was accomplished differently. But that equipment was physically much larger, attaining, ~.008 to ~.025 per revolution.
By linking carriage to tailstock with eyebolts and chain or a tie bar. The advantage of tie bar, interrupting feed, and joggling handwheel functioned as a chip breaker. The tailstock clamp was not engaged, pulling from below let ways do their job.

I'd hesitate loading a machine lead-screw this way, while a feed shaft is built for the job.