Auto-retract threader - video

[Jon]

Auto-retract threader. By Phineas J. Whoopee. 2:58 video:

[Ralphxyz]

Nice, but how does it work?

[BuffaloJohn]

Nice, but how does it work?

The tool holder has a sping loaded piston to drive the tool away from the work. There is a trip lever on the tool holder that will release the piston when the setup is in the desired position. The desired position is set by the screw device you can see at 0:30. That trip device in the earlier versions is higher and then he moves it so the trip is lower and it isn't as visible in the last versions.

Biggest issue will be regidity as to have a fast acting moveable tool holder, you have to have enouigh slop for the tool to move. If the force is always cutting in the same direction, you can be assured that the play will be consistant.

[mklotz]

I have to presume that he's still disconnecting the carriage from the leadscrew by hand. That's acceptable but could get touchy if, after tool retract, the carriage is close to something that matters.

[BuffaloJohn]

I have to presume that he's still disconnecting the carriage from the leadscrew by hand. That's acceptable but could get touchy if, after tool retract, the carriage is close to something that matters.

I would agree. Since he manually resets the tool piston, he can have other operations that didn't make it off the cutting room floor where he disengages, reverses, etc. before reengaging...

[metric_taper]

I have to presume that he's still disconnecting the carriage from the leadscrew by hand. That's acceptable but could get touchy if, after tool retract, the carriage is close to something that matters.

Same YT channel;