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Old 04-23-2010, 09:51 PM   #41 (permalink)
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Would Delrin be a good material for paintball barrels?
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Old 04-23-2010, 11:27 PM   #42 (permalink)
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Would Delrin be a good material for paintball barrels?
it might wear too quickly and also it would be pretty fragile (of course I consider a good bit of CF barrels fragile). And its coefficient of thermal expansion is much much higher than aluminum.
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Old 04-25-2010, 05:25 AM   #43 (permalink)
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Originally Posted by Leafy View Post
it might wear too quickly....

....CF barrels fragile...

.... coefficient of thermal expansion is much much higher than aluminum.
Nope.

Why?

Nope.
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Old 04-25-2010, 06:59 AM   #44 (permalink)
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Nope.

Why?

Nope.
Why?
No?
Sure?
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THE-SHOOTIST Anyone chubbin' like me for this?
mailmanmike Since Monday! That's more than 4 hours though, so according to those cialis ads I should see my doctor.
tlane77 I think for a non-chemical chubby it's 6 hours before its time to see a doctor. So you should be good for another couple hours.
splattttttt I wasn't goin to google "chubbin" because I assumed it had to do with fat. The lard type, not the fun stuff. But what ever feelings Jeff's experiencing, then they must be of the fun like stuff...
tlane77 He's got a woody for your woods.
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Old 04-25-2010, 08:34 AM   #45 (permalink)
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but the cote is higher around 2-3 times higher.
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Old 04-25-2010, 08:58 AM   #46 (permalink)
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Why?
No?
Sure?
Delrin doesn't gall.

Despite a decrease in weight, carbon fiber is stronger than aluminum per cubic inch.

I'm mistaken. Delrin has a worse coefficient.
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Old 04-25-2010, 09:10 AM   #47 (permalink)
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Somebody make one and find out.
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Old 04-25-2010, 10:01 AM   #48 (permalink)
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Make a delrin barrel?

Barrel making isn't the easiest machine process.

To illustrate... Here is a failed plastic barrel.

One advantage of making a barrel from a low friction plastic is that you wouldn't have to hone it. A very sharp reamer would get a fine surface finish easily.



What failed in making this barrel was a lack of support for the material behind the chuck jaws. When the special drill bit passed the chuck jaws, the plastic tore.

The more ya know...
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Old 04-25-2010, 07:08 PM   #49 (permalink)
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This statement is misleading and akin to "diamond is harder than glass." Sure, but if you smash a diamond with a hammer, it's going to turn to dust.

Carbon fiber is used in the aerospace industry to reduce weight in major load-bearing structures. Aerospace is also a "clean" environment: debris is removed from runways and taxiways so there's little risk of a stone punching a hole in a wing.

For high-wear items, items that could be subject to extreme wear, abrasion or impact, carbon fiber is NOT an ideal material, unless you treat it as a disposable item. Race cars would be a good example: if a part gets broken, they replace it in the pits in seconds and the sponsor eats the million dollar loss.

My barrels aren't disposable and I'd prefer one that will survive a core sample or an accidental tap against a nail protruding from a bunker. Carbon fiber won't.
I'm thinking that CF is more abrasion resistant than aluminum. But you're certainly right to think that it's more brittle.

That's ok. You're entitled to that opinion. But I have yet to see pictures of catastrophically broken barrels like I've seen pictures catastrophically broken egos. I've used carbon fiber barrels on and off for 3 years now. And I am literally abusive to my equipment.

Sure. There's always a stronger material. But you only need strong enough to get the job done. The ideal material is the best of a combination of values. Aluminum isn't the best, regardless of what your values are.
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Old 04-25-2010, 07:14 PM   #50 (permalink)
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its not so much the breaking issue with carbon fiber barrels thats the issue, although its there, its that if your rub it a bit to hard against a tree and get the top coat of resin off the whole barrel is basically going to start its slow death as the fiber unravels.
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