3C Collet Backstop

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3C Collet Backstop

This topic has 10 replies, 6 voices, and was last updated 5 March 2012 at 12:05 by jason udall.

Viewing 11 posts - 1 through 11 (of 11 total)

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4 March 2012 at 16:03 #16779
Saxalby
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@saxalby
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4 March 2012 at 16:03 #86478
Saxalby
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@saxalby
When I bought my Boxford, many years ago, among other accessories I purchased the 3C collet attachment and as well as the standard set of Imperial collets, I purchased a set of BA hex collets.

I have used them extensively over the years, but always wished that someone made a backstop for the 3C collets. So I finally got round to making one.

As the 3C’s don’t have an internal thread like the 5C (at least any I’ve come across), I made it lock in place with an expanding sleeve.

Extremely useful it has been, and so thought I would post a few pics in case anyone else is using 3C or indeed morse taper collets, just to show simple a stop is to make.

Barry
4 March 2012 at 16:33 #86480
Gray62
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@gray62
Very nice piece of kit there, why not write it up as an article for MEW
4 March 2012 at 16:51 #86483
Saxalby
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@saxalby
Thanks CoalBurner – May just do that, but will have to hone my drawing skills as I designed it on the back of an envelope.

Regards

Barry
4 March 2012 at 18:45 #86497
_Paul_
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@_paul_
Thats very nice Barry, I still use 3c collets alongside ER32 I hope you do make an article of it.

If not would you be willing to disclose the dimensions?

Regards

Paul
4 March 2012 at 19:03 #86503
Saxalby
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@saxalby
Thanks, I will draw it up and provide a working drawing.

Regards

Barry
4 March 2012 at 21:59 #86529
Terryd
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@terryd72465
Hi Barry,

I also have a Boxford Model BUD equipped with 3C collets and your device sounds like a very useful addition for repeat components. If you do make up some drawings I would be very grateful if you could let me have a copy I could send you my email address in a private message.

Best regards

Terry
4 March 2012 at 22:27 #86531
Saxalby
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@saxalby
Thanks Terry

Will certainly let you know when I have some drawings.

Regards

Barry
5 March 2012 at 01:58 #86543
jason udall
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@jasonudall57142
Nice.

Now how about one adjustable from frount?
5 March 2012 at 10:38 #86565
Bazyle
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@bazyle
Make the 'pin' on the stop screw a hex also with a screwdriver slot (which doesn't affect its stopping function), make the fit tight so locking nut not essential, and adjust with a screwdriver in small sizes and a hex socket on larger ones.

The picture is so clear a drawing shouldn't be necessary. Just remember to use a thread whose pitch helps make small adjustments by fractional turns eg 1mm or 20tpi rather than .8mm or 18tpi.

It's so neat I want to make one now and I rarely use my collets.
5 March 2012 at 12:05 #86577
jason udall
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@jasonudall57142
Sorry Bazyle and others ment as joke.

Use collent stops day in day out

5C abd 16C

and indeed adjust screw from frount is one way.

Doesn't fix the variable pull back due to variation of part diameter though does it
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