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Old 02-27-2010, 10:39 AM
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To straighten tubing coming off a roll I do much the same thing that CBoy illustrates but I leave it a few inches long so I can pinch the ends and put one end in the vise and the other in a vise grip.

Then you pull and twist a quarter turn, depending on how heavy the tubing is you might need a second body to help pull and tension the tubing. You end up with arrow straight tubing after it's been stretched and twisted slightly.

Trim off the pinched ends...voila perfectly straight annealed tube, old machinist trick.
“She may not look like much, but she's got it where it counts, kid. I've made a lot of special modifications myself.”

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