Shrink tubing - Spey Pages
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post #1 of 11 (permalink) Old 01-19-2019, 04:15 PM Thread Starter
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Shrink tubing

Does anyone have a source for the tubing line manufactures use to protect their loops?


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post #2 of 11 (permalink) Old 01-21-2019, 01:11 PM
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Go to an electrical supply store in your area.

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post #3 of 11 (permalink) Old 01-21-2019, 01:23 PM
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I get mine on amazon. I know I am bad and depriving my local supply store, not to mention the gas station, but instant gratification!

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post #4 of 11 (permalink) Old 01-21-2019, 11:37 PM Thread Starter
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I didn’t find anything on amazon but the polyolefin tubing I use for welding. Some of the lines come with a protective tubing that’s more pliable and durable protecting the loop.
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post #5 of 11 (permalink) Old 01-21-2019, 11:56 PM
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Originally Posted by BudCrist View Post
I didn’t find anything on amazon but the polyolefin tubing I use for welding. Some of the lines come with a protective tubing that’s more pliable and durable protecting the loop.
Ah, misunderstood what you wanted. Maybe JD did too. I’m playing the social media version of the game “Concentration” here, but I think SP member domantas hinted a few years ago the he had a source for tubing that welded to the line, like some of the comercial loops have. I don’t know if it is top secret, or involves exchanges in back alleyways, but you might try pming him. If he tells you, and gives you permissson, let us know what you find out.

I dont even know what that stuff is called, but would like to.

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post #6 of 11 (permalink) Old 01-21-2019, 11:59 PM Thread Starter
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I found some pvc shrink tube on eBay. I will let you know how it works
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post #7 of 11 (permalink) Old 01-22-2019, 02:12 PM
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I used to use the packs below, available from Grainger. I would just cut each piece in half.

https://www.grainger.com/category/el...&filters=attrs

My local hardware store now has 4' sticks of the shrink tubing basically like this: https://www.alliedelec.com/3m-mfp-1-...lear/70234571/

I can't tell much of a difference between either- they have both worked well for welding lines together and making loops. I'm pretty sure the 1/8" is the size I use most, but there are various diameters.
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post #8 of 11 (permalink) Old 01-22-2019, 02:15 PM
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My bad...that's what speed reading does for you. Looks like you are looking for another material than what is used for welding....good luck.
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post #9 of 11 (permalink) Old 01-22-2019, 02:22 PM
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My bad...that's what speed reading does for you. Looks like you are looking for another material than what is used for welding....good luck.
Yeah, he wants to do some custom versions of some of the commercial welds that look like they have a jacket fused at the weld. Got me at first too.

Reinforcing things is a double-edged sword as any discontinuity in linear density will form a stress point when casting that can eventually lead to a crack - hoisted by our own petards.

However something really thin that fuses permanently - and colored - would be awsome for coding lines and tips, as well as doing loops ... maybe.

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post #10 of 11 (permalink) Old 01-22-2019, 03:07 PM Thread Starter
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If you’ll look at the loops on OPST lines there appears to be a very pliable sleeve on which the weight is printed. There is also a different type sleeve on the Airflo lines.
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post #11 of 11 (permalink) Old 01-22-2019, 03:26 PM
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If you’ll look at the loops on OPST lines there appears to be a very pliable sleeve on which the weight is printed. There is also a different type sleeve on the Airflo lines.
Yes, I like them...at least the way they look and appear to work.

Just to be clear a sudden difference in weight per inch at a point, regardless of pliability, is what I was referring to above. That by itself can lead to cracks after a while. Of course reinforcement can prevent cracks, but it also potentially creates new weak points for just this reason. But the reinforcement does probably protect a bit from the inevitable jump that occurs between the line and the tip - probably a more pressing issue - usually. Another good reason beyond cosmetics to cut a taper in tip of a line before welding a loop - to minimize things.

It’s a catch 22, but unless you physically damage a line somehow, the point just behind the reinforcement/weld in the front of a line is probably where it is going to inevitably fail first from casting. I think it may have been different long ago, but these are usually good enough so lines last fairly long. But might as well be careful of not making things worse.

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