- Joined
- Jun 10, 2019
- Messages
- 534
So, I need to build me a power drawbar for my mill. I'm not planning on anything really fancy. After seeing a bunch of different designs I've been gravitating towards this one; I like its simplicity yet seems very stout and practical. YouTube
I have one very basic question though. On my mill I can completely undo the drawbar and the tool will remain wedged in the spindle. You have to give the drawbar a good rap to knock the tool out.
I assumed that power drawbars had a vertical limit which would effectively do the same thing. e.g. after a few CCW turns, the power drawbar stops moving up / draw bar can't move up any further, thus the unscrewing motion ends up pushing the R8 adapter down and out of the spindle.
The design featured in the video above has no such limit; it can lift right off the linear guides. I thought about the fact that holding the handle down might provide this resistance but it doesn't look like the operator is holding the lever tightly at all. What am I missing?
I have one very basic question though. On my mill I can completely undo the drawbar and the tool will remain wedged in the spindle. You have to give the drawbar a good rap to knock the tool out.
I assumed that power drawbars had a vertical limit which would effectively do the same thing. e.g. after a few CCW turns, the power drawbar stops moving up / draw bar can't move up any further, thus the unscrewing motion ends up pushing the R8 adapter down and out of the spindle.
The design featured in the video above has no such limit; it can lift right off the linear guides. I thought about the fact that holding the handle down might provide this resistance but it doesn't look like the operator is holding the lever tightly at all. What am I missing?