Wow. What another novella!
I'm sure he covered EVERYTHING in there!
I could use it if/when I plaster 'my' pool - but for now, I'll stick with
the garage door spring.
BTW, it's funny that the count for 10, 20, 30 coils was consistent, but
then, on 40 coils, the count went bad.
I'm not sure why - maybe the angle of spring twist is taking effect?
On Sun, 04 Nov 2012 01:14:17 +0000, Danny D. wrote:
OK. Thanks to you guys, I've done the preliminary research.
Now it's time to order a replacement (higher cycle) spring
and to make observations to help the next garage owner
who reads this in the future.
Since this is a replacement spring, the weight of the garage
door is not a critical factor (assuming the old spring worked).
The four replacement spring values of import are:
1.Wire gauge <== not measured directly!
3.Unsprung length <== measured in two parts
4.ID of the coils <== not measured directly!
Interestingly, two of those measurements are not measured directly
because they shrink and expand over time.
See details as to what is "NOT" measured directly in this video:
On Tue, 06 Nov 2012 00:53:46 +0000, Danny D. wrote:
I forgot to mention, the color code red 'often' means right hand
stationary cone as described in this excellent video of how to size a
BTW, if you take your right hand and point your thumb outward along the
line of the 1" hollow shaft. If the winds follow your right hand fingers,
they are wound right (as mine is).
If they follow your left hand fingers, it's a left-hand wind.
another option for the op
buy your own parts so you can get the better quality
hire a guy to install it and you watch him so you learn the real
DIY the next time
there is NOTHING as good as watching someone who knows what they are
I might actually do that! If they let me.
BTW, look at the critter I found hanging out above the 4-inch aluminum
drum when I looked more closely at the wind-up drum just now to determine
if it truly was four inches in diameter:
Here's a closeup of the huge black widow spider next to the drum (after
spraying it with RAID):
And, here's what I was looking for at the time (APCO 400-S):
Note: The APCO 400-S (or is it 400-5?) on the drum apparently indicates a
4-inch drum. I'm not sure what the character after the dash indicates.
It's your house. They can't not let you watch. Offer cold drinks or
coffee, and don't get in their way. Offer light conversation like
"how's business", then you'll likely get a much friendlier banter when
you ask technical questions.
I think the hardest measurement is, surprisingly, the wire gauge.
I just measured the broken spring wire gauge with a rule:
10 coils = 2 5/16", so that's 2.3125/10 = 0.231"
20 coils = 4 11/16", so that's 4.6875/20 = 0.234"
30 coils = 7 1/16", so that's 7.0625/30 = 0.235"
Then, I measured with a micrometer in 3 different places:
Geez Louise. I know how to use a mic - but this wire has been stretched
at the end that I can measure.
How do I better nail down the (real) wire gauge anyway?
On Tue, 06 Nov 2012 02:50:55 +0000, Danny D. wrote:
Making things worse, this chart doesn't show ANY of those numbers!
That chart shows:
0.2343" when 10 coils = 2 5/16" & when 20 coils = 4 5/8"
0.2437" when 10 coils = 2 7/16" & when 20 coils = 4 7/8"
0.2500" when 10 coils = 2 1/2" & when 20 coils = 5"
I hate when I don't know the exact size.
I need a better (more consistent) measurement method.
I'm guessing it's the 0.2343" gauge simply because that's the closest
using the 10+20 coil method; but it's not even close to any one
of my micrometer measurements. Sigh.
On Tue, 06 Nov 2012 00:44:10 -0600, G. Morgan wrote:
Interestingly, I've been on that site a lot as their DIYs
are probably the best out there - and I'm likely to buy from
them - as they're the most helpful - but - I had not been
to that particular page.
They do start out contradicting themselves somewhat though, in that
they say in that page you only need these 5 things:
(2) wire size,
(3) inside diameter,
(4) spring wind, and
(5) type of ends
For a proper DIY, you REALLY need to know (at least) a dozen things:
(1) length (mine appears to be 26.5")
(2) wire size (mine appears to be 0.2343")
(3) inside diameter (mine is 2" ID)
(4) spring wind (mine is wound right)
(5) type of ends (mine are standard)
(6) door height (mine is 7' tall)
(7) drum diameter (mine is 4.00 inches wide)
(8) track radius (mine appears to be 13" which is a strange number)
(9) bearing to drum distance (I can handle a 60"-18"B" spring length)
(10) door weight (I don't know my door weight yet)
(11) twists (mine apparently was twisted 9 times)
(12) cycles (I'm aiming for 20,000 or 30,000 cycles)
I'm going to call the DDM tech support folks tomorrow to figure out
what to do about my strange track radius of 13 inches.
Tech Support: 877-436-9446 ·
Orders: 800-383-9548 / 630-293-1312
Yes. I've seen that. I referenced it prior. What I LOVE about that one is
that it shows the spring breaking before our very eyes!
The thing I don't like about it is that it covers the two-spring doors,
and mine is a single spring.
I hate extrapolating when safety is a factor - but it IS a wonderful
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