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Drill Chuck Falling Off

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not done it yet22/11/2018 21:38:39
7517 forum posts
20 photos
Posted by Stuart Bridger on 22/11/2018 17:50:43:

I went through this with a cheap chuck and arbor. Tried the freezer trick. Ended up buying a decent vertex chuck with integral arbor.

What exactly did you go through? Blueing and confirming a good contact fit after lapping? Simply heating/freezing would not necessarily ‘make a silk purse out of a sow’s ear’.

I have a 2MT, on an ER32 collet from banggood, that would likely take days to lap in. It was simply not a 2MT taper and rattled in any 2MT socket. Lapping in, if attempted, would likely have finished a long way off straight as it only touched at one end of the taper. Real first class rubbish.

That is the risk of buying cheap - trash in this case.

JC5423/11/2018 19:56:42
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154 forum posts
14 photos

I gave the chuck and arbour a good workout today with a lot more abuse than I usually give my tools/machinery and everything stayed nicely together and worked perfectly. Once again many thanks for your suggestions. JCsmiley

Neil Wyatt23/11/2018 20:48:09
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19226 forum posts
749 photos
86 articles
Posted by ega on 22/11/2018 20:48:16:
am not sure why it was necessary to add to the old-style Jacobs tapers.
Presumably, however, I can now finish a new style taper with the appropriate MT reamer.

I suspect you have answered your own question

Why have two tapers to set up for when you can make do with one?

(The real shame is why we don't have all self-holding tapers to one standard for all sizes. Jarno at 1:20 would be good.)

Neil

Stuart Bridger23/11/2018 21:29:33
566 forum posts
31 photos
Posted by not done it yet on 22/11/2018 21:38:39:
Posted by Stuart Bridger on 22/11/2018 17:50:43:

I went through this with a cheap chuck and arbor. Tried the freezer trick. Ended up buying a decent vertex chuck with integral arbor.

What exactly did you go through? Blueing and confirming a good contact fit after lapping? Simply heating/freezing would not necessarily ‘make a silk purse out of a sow’s ear’.

I have a 2MT, on an ER32 collet from banggood, that would likely take days to lap in. It was simply not a 2MT taper and rattled in any 2MT socket. Lapping in, if attempted, would likely have finished a long way off straight as it only touched at one end of the taper. Real first class rubbish.

That is the risk of buying cheap - trash in this case.

I agree, it was a cheap chuck packaged in with the mill I purchased. I didn't blue or lap the taper. I have learned my lesson. The Vertex chuck has been a great investment.

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