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[ATM] Steel tubing for mirror cell

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Subject: [ATM] Steel tubing for mirror cell
From: "Alan K. Henderson" <alankh@ev1.net>
Date: Tue, 22 Feb 2005 12:39:52 -0600
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If I use half-inch-wide bolts for the collimation bolts of an upcoming project, what minimum width of steel tubing should I use to construct the cell? Is 1" wide enough, or should I go to 1.25"? If I go with aluminum tubing, will I have to get something a bit wider?

Kriege and Berry recommend 3/8" bolts for mirrors smaller than 30". Mine's a 16.5", but it's full thickness (3.5") and thus heavier than the usual (50 lbs), so I'm guesstimating that I better go with the half-inch bolt.

Alan K. Henderson
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