Fantastic!
Nice work on the belt buckle!
I am very happy to see this, since it is a great material to make molds for casting resin, and letterpress printing plates, and (as you mention) mechanical parts.
I have a whole box of acetal I have been dying to play with.
Maybe it is time to bug @dan about materials again.
Of course I will need a Glowforge first (hint, hint).
Ah. I thought that looked like a belt buckle I have (mine is a grip6 carbon fiber). They were a Kickstarter or Indiegogo I backed last year. Nice in Delrin. I thought about doing it in walnut or cherry but haven’t sourced webbing I like yet.
So happy seeing some branching out of materials! Wood and acrylic are great but are not really what I expect to use the most, so new materials are always welcome. And the buckle looks great!
Really want to get my hands on some acetal, expensive stuff, to make the, or a, planetary gear mechanism. I’d make acetal ring gears to sit on on wooden hubs, should work.
This is great–thanks for sharing! I’ve been eager to work with delrin for all the reasons @jkopel listed, plus a lot more. Great to see that it cuts so well on the Forge.
As far as I know, most cutting boards are ultra high molecular weight (UHMW) plastics but are not acetal (Delrin is a brand name for a specific formulation). Acetal is much harder and tougher then UHMW, and might even turn the edge of a sharp knife.
Acetal is expensive but worth it for some applications.
Good to know! I just looked up how to determine what plastic cutting boards are made of and everyone suggests burning a piece and making a decision based on the odor! Even though some of them are pretty toxic when burned haha. Someone said if you file off a little bit of a delrin board it smells like spoiled milk. What a fun compositional test that’ll be!
For anyone curious, I find eBay to be a good resource for raw materials (which is nice because it sucks for almost everything else). For instance, I buy almost all my aluminum from there (“Stoner Metals”, I think) and there are also plenty of people selling delrin (and acetal). I got a white 2’ x 1’, sheet, ~1/8" thick for around $14, IIRC (which is roughly 3 times the price of acrylic).
I haven’t cut it yet though. A little slower than acrylic, you say? I’ll keep that in mind, TY!
the webbing I like the best so far is from Country Brook, heavy nylon like this The only hard part is most webbing supplies don’t have a lot in 1.5" for selection. About half as many colors is what I’ve seen.
You slip the free end over the left (or right) edge and into the slot. Suck in the gut and reach behind the buckle and pull it across. It stays due to the friction and pressure