Carbon Fibre Custom Tightbore

[pusangani]

lol teletubbies

[krap101]

Are you machining the carbon fiber, or making a mold and baking it?

[megabeers]

i will still need to inquire about surface finish and durability

i would personally have to machine it, but as for the tubing its manufactured by a carbon fibre specialist. im not baking this up at home in my kenmore.

i actually dont even know or care how they make it, im only concerned about the quality of the finished product they can provide me

[Amos]

I'm pretty sure CF wont hold up like a stainless steel barrel would.

Also, the SVD's barrel is 6.03, First Factory, KM and several other companies make 700mm TBB's.

Making a barrel is pretty damn hard work, the tolerances required are VERY tight.

You seem to know your way around CF, how does that material stand up to abrasion?

[krap101]

It depends on the epoxy they use, but I do believe it would wear away over time. Maybe there could be some sort of ceramic coating or do some electroplating?

[megabeers]

ok ...here's the story. i am aquiring a RS SVD. i want it to be kick ass, right? so im poking around for upgrades. as far as tightbores for this gun, there are none above 650mm and i need 700. edgi seems to be the only option but i cant tell if they even exist anymore. so im sittin here with my vaporizer theorizing about tightbores. i saw some posts somewhere about some guy making these carbon fibre barrels, so, i google 'carbon fibre tube'..call a company, give them the specs and ask them if they can make it. he says yes, he'll call me back with a quote. i dont know jack about carbon fibre and its durability. im a cnc machinist/programmer for 10 years and i was simply throwing an idea at the airsoft community cuz i thought it seemed viable. i will continue to explore it and be happy to share anything i come up with. thanks to those who actually are serious.

[L473ncy]

Originally Posted by krap101

It depends on the epoxy they use, but I do believe it would wear away over time. Maybe there could be some sort of ceramic coating or do some electroplating?

Don't know about Ceramic but electroplating probably won't work as the item being electroplated must be metallic AFAIK..... (been a while since I took high school Chemistry).

Would a "powder coat" possibly improve durability?

As for the barrel and the tolerances.... What kind of consistency in the "straightness" of the barrel would we be looking at? It's fine and dandy to say 6.03mm +/- .005mm but what about kinking in the barrel? That causes more accuracy problems than having a "consistently" tight bore (ie. you could have a 6.01mm +/- .0005mm barrel that's kinked to hell vs a "straight" 6.08mm +/- .005mm barrel and the straight one will probably be more accurate since it's "straighter" and doesn't introduce weird forces from the BB "bouncing" around).

I'd be interested but I'd like to see a small production run and some stringent scientific/quantitative testing as to how much the accuracy is "improved" (compares to or meets) the performance of something like a Prometheus or Madbull tightbore first.

[megabeers]

those are all great questions that i indeed would like to ask the manufacturer. i have a good understanding of straightness and roundness tolerancing and i still have to say the idea seems viable. i will post all details given to me by the manufacturer.

[megabeers]

prometheus and madbull are great but they dont make a 700mm

[krap101]

Sorry if I sound really obnoxious and mean and stuff, forums tend to do that to people. I'm the kind of guy that always points out all the flaws and makes everybody feel terrible, because I try to makes sure as many of the problems get dealt with ahead of time, so imagine me smiley and happy or something :P.

Anyways, edgi is still alive and kicking. I just bought a 430mm 6.01 from airsoft gi for my vsr project. I do know DBC doesn't exist anymore as a company, but he still makes barrels occasionally if you message him. I'm not sure about shipping from the US, but it's there if you look.

Thinking back to it, electroplating th CF should work, as CF is conductive, and I think that's the route I'd want to take if I wanted to pursue this, and had a company to back me up.

I do want to point out, that you probably won't even notice the difference between a 650mm and 700mm barrel but I think edgi is your best bet unless you're set on making a cf barrel.

[megabeers]

the carbon fibre is molded around a steel 'blank' which i would like to assume was straight and true in order to maintain the tolerances

[krap101]

Originally Posted by L473ncy

Don't know about Ceramic but electroplating probably won't work as the item being electroplated must be metallic AFAIK..... (been a while since I took high school Chemistry).

Would a "powder coat" possibly improve durability?

As for the barrel and the tolerances.... What kind of consistency in the "straightness" of the barrel would we be looking at? It's fine and dandy to say 6.03mm +/- .005mm but what about kinking in the barrel? That causes more accuracy problems than having a "consistently" tight bore (ie. you could have a 6.01mm +/- .0005mm barrel that's kinked to hell vs a "straight" 6.08mm +/- .005mm barrel and the straight one will probably be more accurate since it's "straighter" and doesn't introduce weird forces from the BB "bouncing" around).

I'd be interested but I'd like to see a small production run and some stringent scientific/quantitative testing as to how much the accuracy is "improved" (compares to or meets) the performance of something like a Prometheus or Madbull tightbore first.

You may be right about the metal, but I thought that all you needed was a conductive material, and CF is.

I'd imagine a powdercoat would either be too "tacky" or not smooth enough. Over time I guess it would wear down, but it would likely wear unevenly, so accuracy should go way down.

I'm wondering whether a glass barrel would be possible... :P

[megabeers]

thanks, i actually was unsure about what type of difference there really would be for an extra 50mm, i actually just wanted to maintain the 'stock' (barrel length) aspect of the gun more than I was hoping for a huge performance increase over the 650

glass is a way cool idea...

beginning reasearch...

maybe something like ceramic would be cool

durability would be through the roof

[krap101]

One thing you need to keep in mind, is that ceramics are very brittle. You're going to want some sort of composite. (that's why we put rebar in bridges. steel is good in tension, concrete is good in compression)

[megabeers]

http://www.ortechceramics.com/Cerami...FQTrKgodgzrt3A

http://www.iqsdirectory.com/ceramic-...ceramic-tubes/

you'd have be 'gentle'

i also thought titanium bb's would be cool. couldnt find any though.