RE: [CAD_CAM_EDM_DRO] Automatic or easier tool changes for R8mills ?

The quick change draw bar article is in the Home Shop Machinist Nov-Dec 2002
issue.

Mike

-----Original Message-----
From: Mike Gann [mailto:mikegann@...]
Sent: Thursday, November 06, 2003 1:21 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: RE: [CAD_CAM_EDM_DRO] Automatic or easier tool changes for R8mills
?

It attached with threads. Roland made his own tool holders for the different
sized endmills, center drills, drills, etc.
The OD of these holders were 3/4" if I remember right and they had a larger
OD down toward the tool end. He then had this lever/cam operated drawbar
with a 3/4" R8 collet in the spindle. He could then loosen the draw bar,
remove the current tool, slide in the new tool (with a positive stop against
the larger OD of the tool holder and the collet), then flip the lever to
engage the collet. The article indicated this setup gave good repeatability
on tool lengths.

The tool holders use the same basic shape as the ones Les Watts has on this
page:

http://www.lmwatts.com/forsale.html

If I can find the issue I will let you know.

Mike

-----Original Message-----
From: Kim Lux [mailto:lux@...]
Sent: Thursday, November 06, 2003 1:12 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: RE: [CAD_CAM_EDM_DRO] Automatic or easier tool changes for R8mills
?

Thanks, Mike.

Does anyone know of the exact issue ? I used to subscribe to HSM...

Did the drawbar attach with threads or with a pull nipple ?

Kim

On Thu, 2003-11-06 at 13:52, Mike Gann wrote:
> We use the Royal system - it makes easy and fast tool changes. The tool
> holders are on the expensive side. I know there is also a locking screw
you
> should tighten when making a heavy cut with a face mill or even a 5/8"
> endmill. That would slow down the change a little, however we just make
> prototype parts and never push it that hard anyway.
>
> Did you see the article is Home Shop Machinist magazine where Roland
> Friesand (sp?) made a "quick change" tool holder system using a lever and
> cam operated draw bar? I know it was in the last year, but I am not sure
> which issue. You might get some ideas from that.
>
> Hope that helps,
>
> Mike
> -----Original Message-----
> From: Kim Lux [mailto:lux@...]
> Sent: Thursday, November 06, 2003 12:23 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: [CAD_CAM_EDM_DRO] Automatic or easier tool changes for R8 mills ?
>
> Hi people.
>
> We are getting tired of changing tools with the manual drawbar on our
> R8 equipped CNC'd mill. Does anyone have any experience/ideas with
> implementing a quick or automatic tool change with R8 collets ? The
> first step in the automatic change would be to come up with some sort
> of quick change collet system.
>
> I know of two: the air wrench powered drawbar looseners/tighteners and
> the the Royal system whereby the R8 collet is a holder for another
> collet system.
>
> I'm thinking something along the line of adding a pull nipple on top of
> the R8 collet and pulling it up with an air powered drawbar something
> like how the Cat40 system works.
>
> Failing to find something that works for the R8, our next mill will
> have a Cat something taper...
>
> Thanks.
--
Kim Lux <lux@...>

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OFF Topic POSTS: General Machining
If you wish to post on unlimited OT subjects goto:
aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if
you have trouble.
http://www.metalworking.com/news_servers.html

http://groups.yahoo.com/group/jobshophomeshop I consider this to be a
sister site to the CCED group, as many of the same members are there, for OT
subjects, that are not allowed on the CCED list.

NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
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