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Old 05-08-2019, 10:47 AM
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Franklin Sankar Franklin Sankar is offline
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Unwinding part of coil

I used a long nose pliers and wrapped the tip with tape and used it to help unwind a heater coil so I can pass the straight part between rows and continue the coil in the next row. The coil is very stiff and my fingers are not that strong.
Anyone has some tricks they use to make the unwinding easier. 3/8 inches diameter coil.
Franklin.
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Old 05-08-2019, 11:36 AM
Shawn Everette Shawn Everette is offline
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Is that an unfired coil? If so it should have be effectively "annealed" and fairly soft. A light hold in a vice might help if grip strength is an issue.
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Old 05-08-2019, 02:07 PM
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Franklin Sankar Franklin Sankar is offline
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Yes itís unfired but not as easy to do what I am doing. I am using 1 long coil instead of 1 coil in each row. So I have to unwind the coil to get from one row to the next.

Next time it will be different. 1 coil per row.
I nicked the surface of the wire and even though itís a small nick it is a good place for failure.
Thanks
Franklin
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Old 05-08-2019, 02:50 PM
Shawn Everette Shawn Everette is offline
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Alternatively if you had vertical area routed from row to row you wouldn't need to undo the coil. The nick will be a likely failure point, changes in diameter is going to make changes in resistance.
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Old 05-08-2019, 06:52 PM
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Franklin Sankar Franklin Sankar is offline
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Thanks. If I could join the wires it would extend the life. Maybe I could use a welding torch and see if it can melt the wire to mend the nick. But then that may change the chemistry of the wire and create a weak spot.
Time to get read now for the next failure.
Franklin
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Old 05-09-2019, 05:45 PM
Peter Bowles Peter Bowles is offline
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Hi Franklin,
Try heating the area to be straightened with a map gas torch or similar - heat to a moderate orange heat and then as the wire is still hot gently pull and untwist the coil from both sides. The emphasis is on the untwist rather than the pulling.
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