drill chuck fitting

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drill chuck fitting

This topic has 8 replies, 6 voices, and was last updated 27 February 2017 at 16:25 by Howard Lewis.

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27 February 2017 at 11:03 #286219
Bob Stevenson
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@bobstevenson13909
There are, as we know, two main types of drill chuck fitting;…threaded and tapered force fit…..

I've looked on the web but can't find how one measures/determines the taper fit sizes, and the relevant numbering thereof………?

it's time for my Aldi chinese drilling machine to gt a new (non chinese) chuck…the machine has done well over the last few years and well repaid the £30 or so that I paid,…however, the chuck has never pleased me and has to go now….
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27 February 2017 at 11:03 #18434
Bob Stevenson
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@bobstevenson13909
Someone here knows…..please!
27 February 2017 at 11:11 #286227
Ady1
Participant
@ady1
I just got a cheapo lidl version and it's a force fit with not much of a taper

If you want to get it off then I would start by fitting a small milling cutter

Then try some side milling, with no support under the tip for a few mm

The vibration should free it up

Have some support close under the tip, but not touching, to catch the chuck as it drops out

gl

edit: I wouldn't describe it as any particular size, it looked like the spindle fitted straight onto the chuck with mine, no taper

Those units are cheap and built down to a price and any precision taper stuff costs money

Edited By Ady1 on 27/02/2017 11:19:39
27 February 2017 at 11:12 #286228
Benny Avelin
Participant
@bennyavelin86238
Little machine shop has this reference list for Jacobs taper, which I assume is the one.

**LINK**
27 February 2017 at 11:24 #286233
Ex contributor
Participant
@mgnbuk
IIRC my "no-name" Chinese pillar drill had a male B16 taper ended spindle. RDG (and others) sell B16 socket chucks. Again, IIRC, B16 is a stub Morse taper.

HTH

Nigel B
27 February 2017 at 11:26 #286235
Bob Stevenson
Participant
@bobstevenson13909
The taper is decent on my machine (as is the rest of it) and the chuck is easy to remove by gentle persuasion with a mallet. I have clocked the spindle (taper) and it's more than good enough for making bits of clocks,….it's just the chuck letting things down a bit.

Edited By Bob Stevenson on 27/02/2017 11:27:07
27 February 2017 at 11:43 #286238
Bob Stevenson
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@bobstevenson13909
Benny & Nigel,…thanks a lot!…that looks like it!
27 February 2017 at 11:46 #286240
Jon Gibbs
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@jongibbs59756
Posted by Nigel B on 27/02/2017 11:24:03:

IIRC my "no-name" Chinese pillar drill had a male B16 taper ended spindle. RDG (and others) sell B16 socket chucks. Again, IIRC, B16 is a stub Morse taper.

+1

B16 is almost a de facto for cheap pillar drill chucks IMHO and is replacing JT6 in many situations.

Check out Wikipedia here for the dimension of B16 which is based on the small end of an MT2 here… **LINK**

Jon
27 February 2017 at 16:25 #286309
Howard Lewis
Participant
@howardlewis46836
Details of Jacobs standard tapers are shown on page 3.5 of Tubal Cain's Model Engineers Handbook, 3rd Edition.

Issue 10 of the ArcEuroTrade Catalogue, Page 7 shows Chuck Removal wedges, covering JT1, JT2, JT3, and JT6, sold as pairs.

At the top of page 97 there is a comprehensive table giving details of Jacobs Tapers, 0,1,2 Short, 2, 33, 3, 4, 5 and 6, and then DIN tapers, B10, B12, B16, B18, B22 and B24 .

If your small drill press is anything like the Power Devil one that I use to own, the chuck shouldn't need much to remove it. Mine fell out!

Howard

Edited By Howard Lewis on 27/02/2017 16:26:36

Edited By Howard Lewis on 27/02/2017 16:27:04
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