Author Topic: Home Brew ER16 Collet Chuck  (Read 9339 times)

Offline PJW

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Re: Home Brew ER16 Collet Chuck
« Reply #30 on: February 02, 2016, 10:30:06 AM »
thanks Jo :LittleAngel:
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Online Jo

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Re: Home Brew ER16 Collet Chuck
« Reply #31 on: February 02, 2016, 10:38:53 AM »
Mr Silky has a built in Handwheel that I have become very fond of using  :embarassed:.

It  may be an alternative for the Cowells but I fear it might work like a flywheel on such a small machine  :-\

Jo
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Offline gerritv

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Re: Home Brew ER16 Collet Chuck
« Reply #32 on: February 02, 2016, 11:53:32 AM »
When I made my ER16 collet chuck for the Taig, I used a pattern-follower method of cutting the threads. This lets me cut threads of any pitch:

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Offline tvoght

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Re: Home Brew ER16 Collet Chuck
« Reply #33 on: February 02, 2016, 02:09:37 PM »
gerritv, I have seen similar approaches to thread cutting on the Taig (e.g in the link http://www.cartertools.com/brooketh.html), but none so simple or elegant as yours!

--Tim


Offline PJW

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Re: Home Brew ER16 Collet Chuck
« Reply #34 on: February 03, 2016, 11:42:28 AM »
Hi Jo, you were right it is a 3/8 x 32ME thread, :ThumbsUp:
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Offline tangler

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Re: Home Brew ER16 Collet Chuck
« Reply #35 on: February 03, 2016, 12:32:42 PM »
[quote author=gerritv
When I made my ER16 collet chuck for the Taig, I used a pattern-follower method of cutting the threads. This lets me cut threads of any pitch:

Really neat, I've not seen that method before- so simple :facepalm: and so obvious  ;)

Cheers,

Rod

Online Twizseven

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Re: Home Brew ER16 Collet Chuck
« Reply #36 on: February 03, 2016, 10:15:12 PM »
I've obviously had a long day and am feeling somewhat short on brain cells but cannot quite see how that thread following is working.  :headscratch: Could a clever person elucidate a little.

Many Thanks,

Colin

Offline PStechPaul

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Re: Home Brew ER16 Collet Chuck
« Reply #37 on: February 03, 2016, 10:43:32 PM »
It looks like the carriage is being pulled toward the lathe chuck by the engaged threads of the piece held in the drill chuck, which seems to be mounted to the cross-slide. I've never seen it before, and it looks interesting.

I made a spindle hand crank for my lathe for cutting 3/4"-8 LH square threads, since my lowest 120 RPM speed was too fast for comfort and safety.













You can see it in use in my video of the repair and mounting of my 6" 4-jaw chuck (around 12:00):

<a href="https://www.youtube.com/watch?v=fO_WpIo5gzs" target="_blank">http://www.youtube.com/watch?v=fO_WpIo5gzs</a>
« Last Edit: February 03, 2016, 10:52:39 PM by PStechPaul »

Offline tangler

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Re: Home Brew ER16 Collet Chuck
« Reply #38 on: February 03, 2016, 11:38:32 PM »
I think the tailstock is being dragged by the stud screwing into the job as it rotates.  There is a bar low on the tailstock that is pushing the cross slide along.  On many lathes you would have to disengage the leadscrew but the Taig doesn't have one, just a rack.

Well, that's what I see anyway,

Rod

Offline gerritv

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Re: Home Brew ER16 Collet Chuck
« Reply #39 on: February 04, 2016, 12:48:42 AM »
I've obviously had a long day and am feeling somewhat short on brain cells but cannot quite see how that thread following is working.  :headscratch: Could a clever person elucidate a little.

Many Thanks,

Colin

I don't want to hijack the thread but
The tailstock is tied to the carriage. Taig has no leadscrew so the connected assembly just follows along the bolt that I used as the thread pattern. I learned this technique on my Unimat, which while it does have a lead screw also has a spindle that retracts. My web site has some more details: http://hobbies.psgv.ca/making-an-er16-collet-holder/

As PJW found, making your own ER chuck is not that difficult regardless of the lathe used. And the result is made-to-measure for your machine.
Gerrit
« Last Edit: February 04, 2016, 12:54:26 AM by gerritv »
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Offline PJW

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Re: Home Brew ER16 Collet Chuck
« Reply #40 on: February 05, 2016, 01:37:50 PM »
Thanks for the handle pics Jo!!

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