If the chuck falls off the taper itself, then it's not pressed on
firmly and properly. All the chucks (I assume you mean drill chuck)
are expected to come with a taper which matches the spindle in the
mill.
The drill chuck taper is normally a Jacobs taper (JT-somenumber), or a
similar thing.
However, the drill chucks generally are self holding, and you just
press them on (properly).
The key is that the other chucks need a drawbar. The spindle is
hollow, and there's a threaded rod that pulls the taper back into the
spindle. Do not tighten it excessively.
>
>What is the procedure for putting it on and having it stay?
drawbar.
Thanks Harvey. appreciate not being treated stupid!
Yes it isn't pressed on tight and the parts are original. So the fit is correct. I did a google for a drawbar, but the results were not "enlightening" seems the drawbar is a threaded shaft that works like a bearing puller/inserter. I have those from years of auto work. The draw bar is a threaded shaft on one end and smooth with a shoulder on the other? Would be great if the drive shaft were center tapped , but it isn't
How to find one and use one is a whole new issue. My drive shaft is tapered and doesn't seem to have a threaded center so i can assume I need to pull the drive shaft and do a bench press to 4 tons or some such? Is there some tutorial on how to change a taper tool??
Sorry to be so ignorant, but I have a bunch of books and this is not a covered topic.
I know how to put a taper in a dead center on the lathe but there is no rotary force there.
- thanks again.
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