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Old 11-24-2011, 01:58 AM   #1
Mosey
 
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Default ER Collets for my South Bend

Would it be possible, and make any sense to make an ER 32 collet chuck to thread onto my lathe spindle?
I have no way to grind a chuck, so it would only be turned to shape.


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Old 11-24-2011, 04:45 AM   #2
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Default Re: ER Collets for my South Bend

ER32 collets are great. I am sure it could be done. I have seen a collet chuck that was turned and lapped internally with a hardwood lap with valve grinding paste on a hercus lathe which has a thread on the lathe spindle, the body was turned from a lump of 4140 (driveshaft from a scraper free from earthmoving company bin) with same thread and register as the chuck. Yes it would make alot of sense.

Brock


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Old 11-24-2011, 04:57 AM   #3
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Default Re: ER Collets for my South Bend

Have a read of this post it may help. They can be made or bought.

http://www.practicalmachinist.com/vb...ptions-223011/

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Old 11-24-2011, 06:05 AM   #4
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Default Re: ER Collets for my South Bend

Mosey, it's absolutely possible and really worth it to make one.

Mine (shown here on HMEM) is now pretty much the most used chuck on my lathe as I tend to make lots of little parts.

Regards, Arnold
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Old 11-24-2011, 06:26 AM   #5
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Default Re: ER Collets for my South Bend

Hi Mosey

If your spindle bore is MT3 it may be worth just buying one at $20 + freight

http://www.ctctools.biz/servlet/the-...T-CHUCK/Detail

with a 1/2" draw bar, unless your just into making it for the exercise
Bez
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Old 11-24-2011, 08:03 AM   #6
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Default Re: ER Collets for my South Bend

Another make your own but with a little more detail.

You would make the register to match your machine.

http://madmodder.net/index.php?topic...23587#msg23587


John
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Old 11-24-2011, 08:54 AM   #7
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Default Re: ER Collets for my South Bend

You can make a perfectly adequate ER32 collet holder on the lathe without using a grinder. This is one I made a while ago, I got .02mm, 8 tenths of a thou TIR 50mm from the chuck.
http://bbs.homeshopmachinist.net/showthread.php?t=33587
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Old 11-24-2011, 10:41 AM   #8
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Default Re: ER Collets for my South Bend

On the one I made, I nearly got my grinder out, but found I got such a good finish hand feeding, I didn't bother.

For anyone interested in making holders and things to swap between lathe and mill, rotary table, spindexer, 5C blocks etc.

I showed a whole range of things being made over on modders.

If you want, I can give all the links.

Sorry Mosey, I'm not trying to hijack your post.


John
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Old 11-24-2011, 12:51 PM   #9
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Default Re: ER Collets for my South Bend

links, sir john, are mucho appreciated!
Google is my friend and I got at least some of them...

thanks much,

tom in MA
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Old 11-24-2011, 06:39 PM   #10
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Default Re: ER Collets for my South Bend

OK Tom,

But don't blame me when we get warned for post hijacking.

Hope these are worth you saving

The start of it all

http://madmodder.net/index.php?topic...sg1458#msg1458


5MT to Myford nose

http://madmodder.net/index.php?topic...20614#msg20614


5C to MT

http://madmodder.net/index.php?topic...52580#msg52580


5C to R8 adaptor

http://madmodder.net/index.php?topic...53225#msg53225



Plus a few other bits 'n bobs

Lathe chuck backstop

http://madmodder.net/index.php?topic...22616#msg22616


Tailstock V centre drilling head

http://madmodder.net/index.php?topic...53061#msg53061


Mill vice backstop

http://madmodder.net/index.php?topic=1007.0


John



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