RE: ATM trepanning diagonal

["Russell Jocoy" <russjocoy@hotmail.com>]

>From: "Jerry B. Hillman" <JBHillman@ev1.net>
>Reply-To: "Jerry B. Hillman" <JBHillman@ev1.net>
>To: <atm@shore.net>
>Subject: ATM trepanning diagonal
>Date: Sat, 17 Jan 2004 21:15:14 -0600
>
>
>Hi all,
>I finally got my diagonal blank figured the way I want it.  Straight fringe
>lines. Now I need to cut it and then I suppose I need to recheck the figure
>and touch it up if cutting it relieves stress.
>So far the only tubing I have found that is big enough is exhaust pipe. 
>This
>needs to be between 3" and 3.25". 3.125 would be ideal.  I attempted to 
>form
>a cutter from flat 24 gage steel but was unable to make it round on the 
>free
>end.
>If anyone has done this and has some suggestions I would be happy to 
>listen.
>I only have two blanks and I want to end up with one useable diagonal. (my
>third blank is too short.)
>Clear skies, Jerry
>
>
("atm@shore.net")

     Jerry,     In the construction industry concrete core drillers are used 
to core out concrete
floors or walls for conduit, air vents , etc. Where I work we use them to 
core out concrete for
aluminum railings then pour quick set concrete to hold the posts to the 
floor.
    Our company is faxed flyers by manufactuers of these core bits. The 
cutting edge of these
bits are impregnated with diamond bits as to cut through anything. These 
bits are used only on
special drills that have there own stands and are water fed.  The diamond 
core bits come in sizes
from 2 inch to 12 inch.  The problem is they are very expensive. If you have 
connections to
someone that uses one of these core drillers, it just so happens 3 inch is 
the most common
diameter used.  With one of these machines it would probably only take 30 
minutes to cut and
that would be going slow...
                                               Russ Jocoy
("atm@shore.net")

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