RE: [CAD_CAM_EDM_DRO] Off topic? Machining some inserts

Too bad you can't use a 4-40 thread, then it would be a standard standoff
that you could buy in bulk.

Abbatron / HH Smith Standoff; Round; Aluminum; 4-40 Thread; 1/4" OD; 1/4"
Length; Full Thread

35 cents each.

John C

-----Original Message-----
From: CAD_CAM_EDM_DRO@yahoogroups.com
[mailto:CAD_CAM_EDM_DRO@yahoogroups.com]On Behalf Of Jack McKie
Sent: Friday, February 10, 2012 12:30 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: Re: [CAD_CAM_EDM_DRO] Off topic? Machining some inserts


Problem is a combination of things and I think a large part of it is crumy
tailstock and crumy worn out jacobs chuck.   These mini lathes have dreadful
tailstocks.   My larger lathe goes too slow to drill the hole. With the
aluminum it also may be the stock having some inconsistancies.   If it were
just one issue I would try to find a work around but I think it is a few
issues.   I need 500 of these so don't want to get into lots of wasted
stock.  
 
J 


________________________________
From: Roland Jollivet <Roland.Jollivet@...>
To: CAD_CAM_EDM_DRO@yahoogroups.com
Sent: Friday, February 10, 2012 12:14 PM
Subject: [CAD_CAM_EDM_DRO] Off topic? Machining some inserts

Is the problem the chuck contricity, or general wobble or slack in the ways?

Why not; take a piece of 3/4 bar, cross drill it near the end and put a
thread in it. Now put it in the lathe and bore it 1/4. Now put your part in
the hole and clamp with a machine screw through the hole your tapped..

Then you can machine the part as desired.

Regards
Roland

On 10 February 2012 18:44, Jack <freshwatermodels@...> wrote:

> **
>
>
> I am working on a project and ran into a stumbling block. I was trying to
> machine some parts on my junky 7X10 lathe but can't hold a reasonable
> tollerance in terms of concentricity. The part can be made out of any
> metal, brass or aluminum would be fine. (I was trying aluminum). The basic
> dimensions are 1/4" diameter by 1/4" long with a 2-56 threaded hole
> through. They might be a good candidate for a simple beginners CNC lathe
> project. I need 500 for the project. If made of brass they could be
drilled
> #53 and I could take care of the threading.
>
> If you would be interested in making these parts for me please contact me
> via email and we can discuss.
>
> Thanks,
>
> jack
>
> 
>


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FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
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[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
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