RE: [CAD_CAM_EDM_DRO] Reducing diameter of a ball screw shaft.

Jon,

What is a Mac TPG - a type of positive ground insert??

George



-----Original Message-----
From: CAD_CAM_EDM_DRO@yahoogroups.com
[mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of Jon Elson
Sent: Thursday, May 19, 2005 11:07 AM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: Re: [CAD_CAM_EDM_DRO] Reducing diameter of a ball screw shaft.

Mike Delany wrote:

>You might look at using a tool post grinder for this operation. They

are

>very handy for working with hardened materials and will give a great
>finish. It will take a lot longer than using carbide on hardened
>materials, but if you are using a smaller lathe that is not super

stiff,

>if will be much more peaceful. I cut some stainless on my old Jet 9x20
>that had a very poor surface finish and I thought it was going to rip

the

>compound when I started working on the surface. Until you knock all of
>the threads off and get continous tool contact, it will be a wild ride.
>
>Tool post grinders come up on ebay all of the time, the Dumores are

highly

>sought after and expensive because of the high quality components and
>finish they leave. Littlemachineshop.com has a couple of imports that

are

>under $200 that I have heard are decent. Another route to go is

clamping

>a dremel or die grinder to jig on your compound and working slowly with
>that.
>
>

Don't forget The Mac TPG's. They are as good as a Dumore, at least. I
have done
some ballscrew ends with mine, and the results looked 100% professional.
I did use some crummy C-6 carbide inserts to get within .010" of final
dimensions.
Cutting a .875" leadscrew down to 3/8" for 1" length would have taken a
week by
grinding. It did use up one whole insert (3 points) per end, but that
was an acceptable
cost, for sure! I did this on a 12" Atlas lathe, so it wasn't done with

massive industrial
machinery.

Jon



Addresses:
FAQ: http://www.ktmarketing.com/faq.html
FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com

Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@...,
timg@...
Moderator: pentam@... indigo_red@... davemucha@...
[Moderators]
URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO

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........
bill
List Mom
List Owner


Yahoo! Groups Links