RE: [CAD_CAM_EDM_DRO] Project on a miniscule budget

First off, a .1875 square will not fit inside of a .250 diameter, lapped or
otherwise.

After that you might try Reid Tool Supply: HYPERLINK
"https://reidecom.reidtool.com/xephr/edit/ITEM_GROUP_DETAIL?query=*CATALOG_I
D=RF118&query=*ITEM_NO=SHS-18&query=*GROUP_ID=100583&query=*START_WITH_ID=10
0583"https://reidecom.reidtool.com/xephr/edit/ITEM_GROUP_DETAIL?query=*CATAL
OG_ID=RF118&query=*ITEM_NO=SHS-18&query=*GROUP_ID=100583&query=*START_WITH_I
D=100583

Where you’ll find a .3125 diameter with a .1915 square sleeve, 1 ½ inches
long for $10.35 USD.

R. Wink



_____

From: CAD_CAM_EDM_DRO@yahoogroups.com
[mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of milespaul2004
Sent: Thursday, February 15, 2007 7:05 AM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] Project on a miniscule budget



Here's one to challenge all of you!

I need to put a 0.1875" square hole along a 1.25 inch length of a
0.250" square BMS bar. I need this hole to be a lapped or precision
fit on 0.1875" square bronze slipper. Fabrication using silver
soldered joints is a possibility but so far I have not been able to
produce these components with the fine finish I need for the job...
An EDM machine came to mind and I would like to have a go at making a
simple one if that's possible.
I am retired here in the UK and have little spare cash but as an ex
audio engineer and film sound recordist I do have some knowledge of
electronics.
I know there was a circuit for a very simple machine in Model
Engineer magazine many years ago (1970's I think) but tracking the
issue and a copy down has been fruitless so far even through the now
owners of the publication.
I believe the designers name was Roy Amsbury who worked for Rolls
Royce in Derby but I have been told he passed away some years ago.
Just wondered if anyone has a simple EDM machine design that they
might be prepared to let me have. Could be an interesting project to
pass the time away with.
Regards to all
Paul Miles.




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