I give up and have to ask, ok I abused it and it's probably really
stuck and left for at least 5 years. I've beat on the loosened draw
bar probably less than what the threads can handle and afraid to hit
it harder. IIRC the draw bar won't come out, if it does, anyone know
what Dia. rod I can use for a punch? Or will pickle fork work or what?

Sunworshipper wrote:
I give up and have to ask, ok I abused it and it's probably really
stuck and left for at least 5 years. I've beat on the loosened draw
bar probably less than what the threads can handle and afraid to hit
it harder. IIRC the draw bar won't come out, if it does, anyone know
what Dia. rod I can use for a punch? Or will pickle fork work or what?



The drawbar on my M head came out, but I had the same problem.
I ended up heating the spindle with a propane torch, while I
had ice on the end mill holder. I had made a pair of c-shaped
plates that would get between the holder and the spindle nose,
and had bolts spreading the plates. I beat on the drawbar with
a 5-Lb hammer, all at the same time. Finally, the combination
of the 3 techniques all at once broke it free.

The pickle fork, or maybe two of them together, might do better
than my plates and bolts.

Jon

In article , Sunworshipper says...

I give up and have to ask, ok I abused it and it's probably really
stuck and left for at least 5 years. I've beat on the loosened draw
bar probably less than what the threads can handle and afraid to hit
it harder. IIRC the draw bar won't come out, if it does, anyone know
what Dia. rod I can use for a punch? Or will pickle fork work or what?

M heads in principle have a drawbar that pushes as well as pulls. If
it's the stock one then holding the larger nut (with the two flats)
and then turning the upper one (hex) CCW as viewed from above, should
apply force to expel the collet.

If it's not the stock drawbar, or if using the pusher feature simply
isn't strong enough, go easy on the spindle. Those are basically
a pair of SAE 205 bearings in there and they're tolerably fragile.

If it's stuck bad, I would consider removing the quill and
using a hydraulic press to push the collet out, so you can make
up a fixture to press against the bottom of the spindle, so no
force is applied through bearings. Good luck my friend.

Jim


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please reply to:
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On 13 Oct 2005 05:17:10 -0700, jim rozen
wrote:

In article , Sunworshipper says...

I give up and have to ask, ok I abused it and it's probably really
stuck and left for at least 5 years. I've beat on the loosened draw
bar probably less than what the threads can handle and afraid to hit
it harder. IIRC the draw bar won't come out, if it does, anyone know
what Dia. rod I can use for a punch? Or will pickle fork work or what?

M heads in principle have a drawbar that pushes as well as pulls. If
it's the stock one then holding the larger nut (with the two flats)
and then turning the upper one (hex) CCW as viewed from above, should
apply force to expel the collet.

If it's not the stock drawbar, or if using the pusher feature simply
isn't strong enough, go easy on the spindle. Those are basically
a pair of SAE 205 bearings in there and they're tolerably fragile.

If it's stuck bad, I would consider removing the quill and
using a hydraulic press to push the collet out, so you can make
up a fixture to press against the bottom of the spindle, so no
force is applied through bearings. Good luck my friend.

Jim

Good luck is right. I read your post of course after the scary one
and your's sounded familiar so I went out to check that out. Cleaned
the operating table and pulled the head out of the back bottom shelf
and plopped it on the bench and it looked like a cheap pet from dust
and oil. Then I cringed and looked closely trying to over look the
dust and fine sand and freaked, I obviously already figured it out
before and the draw bar and the tool holder are missing. ) Scary,
I don't recall accomplishing that at all.

Thanks for the help, I have to at least put it through a parts washer
cause I'm gonna have to get it up and running.