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Old 05-20-2009, 03:58 PM   #1
tmuir
 
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Default How do you unstick a stuck morse taper in an X2 mill?

I tried to remove my er32 chuck tonight but I couldn't, the Morse taper is stuck in well and truly.
I tried undoing the retaining bolt a couple of mm and tapping it with a rubber mallet but had no joy.
Tried locking the spindle and fitted a large spanner to the chuck and attempted to turn it and pull down with no luck.
I actually don't really need to remove it at the moment but I may some day so any tips to get it out would be great.

thanks



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Old 05-20-2009, 05:14 PM   #2
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Default Re: How do you unstick a stuck morse taper in an X2 mill?

Do not try to twist it, you could damage the mating surface. Support the bottom of the mill with something, I have just set it down on 123 blocks or something like that, and use a metal hammer on the drawbar. It should come out with that. The rubber mallet does not transfer enough force. A few small blows are better than one large one. Once you get it out check the surfaces, and see of you had a chip get in. I wipe the surfaces down with a little spindle oil from time to time to keep them from sticking.

Dale



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Old 05-20-2009, 07:00 PM   #3
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Default Re: How do you unstick a stuck morse taper in an X2 mill?

A brass punch or hammer is what I would use first to insure that you don't any damage.

Philly

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Old 05-20-2009, 08:26 PM   #4
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Default Re: How do you unstick a stuck morse taper in an X2 mill?

I use the copper end of a copper/hide mallet on the draw bar of my X3.

Try removing it after the machine has been running a while, it may just warm up teh spindle a touch to make it expand slightly.

Jason

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Old 05-21-2009, 01:00 AM   #5
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Default Re: How do you unstick a stuck morse taper in an X2 mill?

This may seem elementary,but I don't know how much experience you have with your mill.
Unscrew the drawbar a couple of turns,then tap it with a hammer.This should loosen the taper enough to unscrew the drawbar by hand,and remove your tooling.
Maybe teaching you to suck eggs,but I had this vision of a fellow knocking the bejasus out of the drawbar,and getting nowhere.

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Old 05-21-2009, 02:07 AM   #6
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Default Re: How do you unstick a stuck morse taper in an X2 mill?

The only X2 with a Morse taper that I am aware of is the Grizzly
machine with a MT#3 taper. The draw bar thread in that machine
has a M12-1.75 thread. If my assumptions are correct, I would
recommend going to your local hardware store to purchase a long
M12-1.75 bolt. Screw it into the back side if the ER32 chuck until it
bottoms out then back it off two full turns.
After doing that, give the head of that bolt progressively sharper
raps with a steel hammer. I think you'll be surprised by how easily
it will let go by that method.

Rick

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Old 05-21-2009, 09:00 AM   #7
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Default Re: How do you unstick a stuck morse taper in an X2 mill?

Quote:
Originally Posted by bentprop
This may seem elementary,but I don't know how much experience you have with your mill.
Unscrew the drawbar a couple of turns,then tap it with a hammer.
Thats exactly what I was doing but was getting nowhere with the method.

I remember someone showing their lead hammer they made.
I've got several kg of lead I might make myself one of those at some point but will need to buy an appropriate face mask first.
Here we go again, buy a tool to make a tool to fix a tool so I can finish making another tool.
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Old 05-21-2009, 12:12 PM   #8
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Default Re: How do you unstick a stuck morse taper in an X2 mill?

I know this may sound silly but I have the same mill as yours and have had similar problems, I use a plastic faced hammer and sometimes I have to belt it really hard,up until now it has always eventually come out!, as dwentz says ,don't twist it but when you put it back ,a tiny smear of oil doesn't stop it sticking but helps a lot to get it out again!, also try taking the draw bar completely out and squirt some WD40 in there and leave it for a while, then try again!

Giles

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Old 05-21-2009, 01:03 PM   #9
bob ward
 
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Default Re: How do you unstick a stuck morse taper in an X2 mill?

Is a an improvised puller feasible?

I'm thinking 2 metal plates, one bears on top of the loosened draw bar, the other across the quill area, and 2 lengths of threaded rod to tie them together

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Old 05-21-2009, 02:57 PM   #10
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Default Re: How do you unstick a stuck morse taper in an X2 mill?

Quote:
Originally Posted by rake60
The only X2 with a Morse taper that I am aware of is the Grizzly
machine with a MT#3 taper. The draw bar thread in that machine
has a M12-1.75 thread.

Rick
For reference... In Canada, Princess Auto sells the X2 with an MT3 spindle as well, even though their catalog states it is R8.

The draw bar thread is not machine specific though, since it only passes through the machine. It's the accessory (end mill holder, collet, drill chuck, etc.) that determines the thread. I have accessories that use 3/8" draw bars and others that use M10 draw bars.

But, getting back on topic... On my X2, I loosen the draw bar a couple of turns to start. Now if the table is clear, I lower the head onto "something" to support the head. Usually though, there is a setup on the table and I'm changing cutters mid-project. In this case, I make sure to tighten the lock on the Z-axis. Now give a few light-medium taps. As mentioned before, this is better than a big whack. I use a small 4 oz. hammer for this. It's small enough to remind myself not to swing it to hard. This has always worked for me.

Every once in a while, I'll rub the inside of the spindle taper with an oily rag to clear out any possible chips. Just remember to dry it off before using - you don't want oil in there. All collets, chucks, etc also get a quick rub with an oily cloth and a dry down before being installed.

Andrew


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