[AT] Machinist setup???

[charlie hill]

Dean,  Make a jig out of something like a piece of 3/4 x 3/4 angle iron.
Drill the angle iron so that it has two 1/4 inch holes the correct distance
apart.  Then put a 1/4" bolt through one hole and secure it with a nut, tack
weld, etc.    Drill all of your rods on one end then slip the hole in the
rod over the 1/4 bolt.   Now use the hole in the other end of the jig to
center the other hole in the rod.

Just one idea that came to mind.   You will have to refine it a bit to fit
your setup.

Charlie
----- Original Message ----- 
From: "Dean VP" <deanvp at att.net>
To: <at at lists.antique-tractor.com>
Sent: Tuesday, April 27, 2004 3:26 AM
Subject: [AT] Machinist setup???


> I would like to get some help on how to set up a drill press to do a small
> amount of repeat drilling. I'm not a machinist but I know there must be a
> simple way to set up a fixture or jig so that I can produce several
> identical drilled parts using a drill press.  I do have a large and small
> machinist vice that I can lock down on the drill press table.
>
> As an example I need to drill two 1/4" holes near the ends of a 3/4"
> diameter steel rod. The critical dimension is the distance between the
holes
> not the distance from the ends of the rods. The tolerances are not tight.
If
> I can get within + or - 0.100" between the holes I would be ecstatic. I am
> cutting the rods to length with a steel band saw so the lengths of the
rods
> will vary a little bit and that isn't critical. I would like to get the
> holes at each end of the rod fairly centered, end to end but the dimension
I
> need to control is the distance between holes, center to center.
>
> Is there a simple way to fixture this so I can get some repeatability and
> consistency with the tools I have available to me? I suspect those of you
> who are machinists or have machinists skills have had to do this several
> times.  I'm a shade tree mechanic trying to do something I don't have
> experience doing. Any help would be appreciated.
>
> Dean A. Van Peursem
> Snohomish, WA 98290
>
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> strong enough.--John Christian Bovee
>
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