how come no one simply makes high rise breeches from delrin ????

how come no one simply makes high rise breeches from delrin ????

Joined: April 28th, 2010, 12:23 am

February 25th, 2012, 3:41 pm #1

Last edited by robnewyork on February 25th, 2012, 3:41 pm, edited 1 time in total.
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Joined: November 28th, 2002, 6:26 pm

February 25th, 2012, 3:45 pm #2

...airguns to be made of nothing but wood and iron - maybe with a just a tasteful hint of brass and rubber here and there.

Steve
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Joined: April 28th, 2010, 12:23 am

February 25th, 2012, 3:58 pm #3

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Joined: September 20th, 2008, 3:22 am

February 25th, 2012, 4:54 pm #4

...airguns to be made of nothing but wood and iron - maybe with a just a tasteful hint of brass and rubber here and there.

Steve
Given that the delrin(or any other plastic type) was stiff enough to hold support the barrel consistently. It would certainly make for a lighter weight rifle(or pistol).

My issue would be the breech flexing and causing accuracy problems.

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Joined: April 12th, 2002, 5:26 am

February 25th, 2012, 5:22 pm #5

Few plastics come close to most common metals in rigidity, and with the structural compromises needed to make a receiver work(bored out, slots on one side and bottom,ability to float the barrel)you need all the material rigidity you can get.Carbon fiber would be one exception, but it needs to be wound and pressure cured to work well, it's a b@tch to machine.

Nylon is easy on bits, but getting a nice surface finish can be tricky..you cant sand or bead blast it like you could a metal component.

Now a riser to fit under a metal receiver..those are made of engineered plastics..it's a good solution.
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Joined: September 12th, 2006, 7:49 pm

February 25th, 2012, 6:45 pm #6

Nylon is notorious for creep. Tighten a screw in a hole tapped in nylon and it will soon be loose. Delrin has much less creep than nylon, but still cannot compete with steel. Nylon is also hygroscopic and will change dimensions with changes in humidity. Plastic is better than steel in many applications, but not in a gun breech.

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Joined: February 9th, 2006, 10:35 pm

February 25th, 2012, 7:04 pm #7

http://en.wikipedia.org/wiki/Breeches

I would not wear breeches made of Delrin.



I plink, therefore I am.
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Joined: November 28th, 2002, 6:26 pm

February 25th, 2012, 7:39 pm #8

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Joined: April 28th, 2010, 12:23 am

February 25th, 2012, 7:57 pm #9

http://en.wikipedia.org/wiki/Breeches

I would not wear breeches made of Delrin.



I plink, therefore I am.
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Joined: November 28th, 2002, 6:26 pm

February 25th, 2012, 8:15 pm #10

Like "trunk".





Steve
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