Simple collet chuck removal tool

Simple collet chuck removal tool

This topic has 4 replies, 4 voices, and was last updated 14 July 2018 at 07:57 by Joseph Noci 1.

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13 July 2018 at 23:28 #362071
Thaddeus Swarfburn III
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@thaddeusswarfburniii
I have a collet chuck for my Emco Compact 8 and use a homemade drawbar to keep it tight. Unfortunately the only way to remove it is to loosen the drawbar and rap on it with a hammer, which is not doing the bearings any favours. I had thought about making a threaded ejector on the outboard end but the spindle holeis 20.5mm, which is not a convenient size to tap. I decided to attack it from the other end. Made a prototype out of PVC pipe and it works so well I don't think I'll bother making it out of metal.

Pics in gallery:

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13 July 2018 at 23:28 #18993
Thaddeus Swarfburn III
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@thaddeusswarfburniii
14 July 2018 at 06:01 #362079
BW
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@bw
Thanks Thaddeus,

Thats terrific – have never seen that before. Nice piece of thinking. I will copy that idea right now this afternoon in 5 minutes.

Bill
14 July 2018 at 06:36 #362080
not done it yet
Participant
@notdoneityet
Looks good. Anything, which makes the extraction more controllable, is better than thrashing with a hammer.

I hope you were not using a steel faced hammer – a copper or lead mallet will load the bearings but not damage them like a hard faced hammer which considerably increases the impulse force transmitted through the bearing contact surfaces.

I use wedges similar to those marketed by ArcEuroTrade (but mine are home-made) and suitable spacers to remove tight MT tapers. Also works well.
14 July 2018 at 07:57 #362085
Joseph Noci 1
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@josephnoci1
Now THAT's thinking out the box! Very smart indeed!

Joe
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