ValveJob wrote:

snipped


I've had both springs on my main door break and each time it punched
thru the sheetrock.

I heated the end with a blow torch and put a new 'end' on it and have
had no trouble since I did the work. That tells me that when they
originally made the springs, they must have weakened the metal more
than I weakened the metal.


I've done the same thing several times and my "new end loops" never fail.

Looking at new extension springs it appears that the end loops come off
the spring with a rather sharp small radius bend.

All the breaks I've experienced occured right at that bend which looks
neat, but is an obvious stress increaser.

I make my bends with a generous radius. They don't look as great, but
they don't break.

Just my .02,

Jeff


--
Jeffry Wisnia
(W1BSV + Brass Rat '57 EE)
The speed of light is 1.98*10^14 fathoms per fortnight.