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Old 03-17-2005, 11:33 PM
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engine turning with picture that works

Someone was asking how to do engine turning a couple of weeks ago and I was going to reply but could not attach a picture so I waited. Can't find that post now but anyway.....

I tried a bunch of the methods described on the board and none of them worked. Tried wooden dowel with grinding paste, tried disc grinding pads tried wire brush etc. etc.

Finally I put an end mill in a milling machine and plunged it into the aluminum about .005 and moved over and repeated the process. The first try was ok but too many burrs all over the show surface. I ground a small radius on the end mill and OH Yeah success.



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Last edited by Ratchet; 03-24-2005 at 01:12 PM. Reason: Attachment didn't work
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Old 03-18-2005, 05:54 AM
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Can't see your pic, but am interested in any helpful hints you might have.

I don't really have a use for this technique right now, but I've always liked it, and I remember that old thread.

Do you plan on coating the finished product with something to preserve the newly-machined look?
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Old 03-23-2005, 08:48 PM
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checked the picture and it works today can anyone else see it????
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Old 03-24-2005, 08:34 AM
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Nope....no can C
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Old 03-24-2005, 01:28 PM
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I see it now.

Looks great, Ratchet!
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Old 03-24-2005, 03:04 PM
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I see it ..looks good
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Old 03-25-2005, 05:24 AM
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Damn Ratchet........What you doing with a mill in the garage. It needs to be in my garage!!!! Looks PRIMO Great job. Now explain for the others how you kept it in line and how far you moved over on each pass. How did you hold the part down to keep a consistency on the depth? Glad to see another machine operator on here. I've been a Tool & Die Maker and tool designer for 24 years and Tool Designer straight out of High School. And a Setup man and Group leader for large mills after that. So I can appreciate someone that knows how to keep the burrs off of something like what you did. One of the little secrets!!
Kevin
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Old 03-26-2005, 12:38 PM
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Wow. Never thouht of using and endmill for that. I have tried Eastwood's kit and it is like a giant eraser with some abrasive. I tried it dry and the swirls came out dark and dirty. I then tried some WD40 and the swirls came out crisp and very reflective. I am going to make a console for my El Camino with an engine turned insert.
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Old 03-27-2005, 06:23 PM
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As I recall I used a .500 dia endmill with about a .060 rad on it and stepped it over about .300 each time I put a spot down. I set the depth stop on the bridgeport so that it took about a .005 cut. When i finished one row I moved the mill over .300 sidways and started the next row. Each row is offset to the one beside it by .250 half the diameter of the endmill. Oh yeah to hold it down flat I simply clamped it to the table with a couple of long strips of 3/4 plywood under the clamps to both keep the entire length flat and prevent the clamps from marking the aluminum.


Ric

Last edited by Ratchet; 03-27-2005 at 06:30 PM.
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Old 03-27-2005, 07:32 PM
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Nice work.
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