Honestly, I've no freaking clue what you're asking about, but I do know one of the owners of Mission Knives knows about at the very least, Delrin. I've bought several delrin products from Mission, and he's at least ok with prototyping stuff if that helps? All have been machined cylindrical items/tubes made of Delrin.The raw material isn't difficult to locate, the finished product has proven to be. Hoping someone with a lathe can lend a hand. It'll require 1" - 2" Acetal rod, maybe 4" long to spin what I need if anyone has some on hand.
lovemachine works in a machine shop and has done small run sort of lathe craft projects to sell. I bet if he cannot do it he knows who can.
Rope bridge?As for an explanation....
I need to build a zipline type trolley but I need it to be quiet, we'll be using it to cross a creek to deer hunt. Steel sheaves/pulleys on a steel wire rope is noisy as all get out, I'm hoping a plastic will be much quieter. We're using 5/16" wire rope and they would need to be made from 1" - 2" OD rod. Width only needs to be as wide as required for them to be strong enough to withstand the load (figure 250lbs spread between two sheaves). I'm thinking an internal diameter should be whatever size would allow rollerblade bearings to be pressed in for smooth operation, we will be pulling ourselves back and forth rather than allowing gravity to do the work.
The plan is to bolt them up between a couple sections of angle iron with a bolt between them to hook a carabiner to. We will hook in via a short section of climbing rope or tubular nylon run to the loops built into our safety harnesses. If anyone has a better option I'd be thrilled to find something readily available that would work, time is short on this project unfortunately.
As for an explanation....
I need to build a zipline type trolley but I need it to be quiet, we'll be using it to cross a creek to deer hunt. Steel sheaves/pulleys on a steel wire rope is noisy as all get out, I'm hoping a plastic will be much quieter. We're using 5/16" wire rope and they would need to be made from 1" - 2" OD rod. Width only needs to be as wide as required for them to be strong enough to withstand the load (figure 250lbs spread between two sheaves). I'm thinking an internal diameter should be whatever size would allow rollerblade bearings to be pressed in for smooth operation, we will be pulling ourselves back and forth rather than allowing gravity to do the work.
The plan is to bolt them up between a couple sections of angle iron with a bolt between them to hook a carabiner to. We will hook in via a short section of climbing rope or tubular nylon run to the loops built into our safety harnesses. If anyone has a better option I'd be thrilled to find something readily available that would work, time is short on this project unfortunately.
lovemachine works in a machine shop and has done small run sort of lathe craft projects to sell. I bet if he cannot do it he knows who can.
Rope bridge?
ETA: If you have to zip in, how do you remove the dead deer? Zip lines tend to work one way?
Thanks Rookie. I'll see if I can find a vendor I'm comfortable with who has them in stock. I don't like ordering from places like that, in my experience they don't worry much about timeliness.