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New bridgeport question


Hot Rolled
Dec 14, 2017
On a manual mill, the ball screws will back drive from the cutter loads. You will spend your life locking and unlocking each axis when you take your hand off the wheel.
"Backdriving" is not always the case. The system configuration determines whether or not force on the slide will cause the screw to turn, or "backdrive". I've never had the pleasure to run a manual machine with ballscrew leadscrews, but I hope think they backfeed. That would be dangerous, indeed.

Isn't that how most good manual machinists operate a manual mill ?

For sure! Lock everything that doesn't need to move to make the cut. Not to prevent backfeed, but to eliminate lost motion in the non-moving part.