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AC 200 drawbar
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Central WI AC guy View Drop Down
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Joined: 20 Dec 2010
Points: 14 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Central WI AC guy Quote  Post ReplyReply Direct Link To This Post Topic: AC 200 drawbar
    Posted: 10 Feb 2011 at 1:30pm
Hi, wondering if anyone has tried to drill a hole in a drawbar before. I have one off of a 200 that I'm thinking about using for a different application that would require drilling another 1" hole in it. Thank you, Jim
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Russ-neia View Drop Down
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Joined: 11 Sep 2009
Location: NE Iowa
Points: 489 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Russ-neia Quote  Post ReplyReply Direct Link To This Post Posted: 10 Feb 2011 at 1:37pm
My local machine shop has done it.  Just have to have a high-quality sharp bit, good cutting fluid and patience.
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Bruce Nelson View Drop Down
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Points: 137 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Bruce Nelson Quote  Post ReplyReply Direct Link To This Post Posted: 10 Feb 2011 at 1:42pm
Drilling a drawbar is not difficult. First drill a 1-4"-3/8" pilot hole. Then drill it to 1", turning the bit very slowly, 120 RPM or less. Keep the bit cool and wet with some cutting fluid or plain old engine oil. If you run into a hardened drawbar, which the 200 is not, start the pilot hole by cutting into the drawbar .030" or so with a carbide burr in a die grinder. If the drawbar is hardened, it will not be hardened very deeply.
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