Best material for v-stacks?

[srcarr52]

Traditionally I've made v-stacks out of Aluminum 6061 T5611 because that's what I have around but it seems a little over kill. I was thinking that I could make them out of plastic that is lighter and easier to machine.

So far Nylon seems to be the most resistant to gas/oil and can operate in higher heat ranges than most economical plastics. Obviously PEEK would be the best choice if money wasn't an option.

Anyone have any suggestions on which plastic would be best?

 

[czar800]

 

[junkman]

How about a splitting wedge for material ?

 

[mdavlee]

What about UHMW?

 

[srcarr52]

What about UHMW?

I though about that but it's only rated for continuous use at 180F. Being on the cold side of the carb it would probably be fine but I'd like to find something that can take a little more heat.

 

[mdavlee]

I doubt they get that hot unless it's a rigid block.

 

[Gunn]

UHMW would work pretty well. The intake side of a carb isn't getting up near 180 degrees from what I can tell.
What's the cost difference between delrin and peek?

 

[Dub11]

Traditionally I've made v-stacks out of Aluminum 6061 T5611 because that's what I have around but it seems a little over kill. I was thinking that I could make them out of plastic that is lighter and easier to machine.

So far Nylon seems to be the most resistant to gas/oil and can operate in higher heat ranges than most economical plastics. Obviously PEEK would be the best choice if money wasn't an option.

Anyone have any suggestions on which plastic would be best?

What about wood? And PEEK is fugging crazy high. We use it at my job $9000 for a 30"long 9"od and 7"id. It can take a beating I tell ya.

 

[Dub11]

https://www.google.com/search?q=pee...&ved=0ahUKEwi7xYH10qjVAhWorVQKHUTJC4gQgjYIiwQ

https://www.googleadservices.com/pa...ahUKEwjJ0LXP06jVAhXnhlQKHQkZD8UQwg8IJg&adurl=

 

[EvilRoySlade]

I'd lean towards PA6 or 66 glass filled. Handles the heat well, dimensionally stable, might be hard on tooling though and doesn't polish well if you want that.
Acetal is another easy to machine, relatively stable one. Not as high temps.
Both aren't too costly.
Heck, most parts under the hood now are PA66 gf30%. Sure, injection molded but still bolted on the engine, radiator etc.

 

[srcarr52]

I bought a rod of Nylon 6/6 (PA66) to try. Looking through the chemical resistance chart and stable temperatures this is what I settled on. I use Delrin (Acetal) on more structural or wear surface applications, it's tough and pretty chemical resistant but it can't take the heat like Nylon can.

 

[Spladle160]

Why not get a cheap 3d printer and print them out of ABS? You could design them in solidworks or a similar program with flow computation.

 

[cus_deluxe]

i made in intake block out of delrin, seen it done elsewhere. dont have much run time, and just for a play saw, so we shall see. seems like if that holds up then a v stack should be cool. and its pretty cheap.

 

[redoakneck]

What is the stuff mortalitool is using???

The aluminum is cool!!!

 

[redoakneck]

Good grief, that peek is like platinum!!!!

 

[Deets066]

Carbon fiber?

 

[Nutball]

Epoxy?

 

[Matt Ellerbee]

Are you printing them or ?