Hotpuppy
Guest
First you have to produce a design then find that machinist. $1000 might get you a two piece mould with nice round corners, but a bunch. With that kind of investment, you better be thinking about producing a million weights and going into business selling them.
I have moulds that would cost you 1/20 what a machinist might charge. Write me at logicdesign@rogers.com and see what I have. There are over 20 different sizes and styles to choose from.
Or you need to find someone who dives and does CNC machining as a hobby.... someone like me. lol.
I have an older Hurco KMB1M knee mill (computerized machine tool in English). The Amazon thing looks like a piece of cake to have the machine make. It's just a matter of using the right end mills (bits) to get the radius (curve) at the bottom. The bigger question... if you are going to cast weights, why bother with something boring like the square pretzel?
Anyhow, it wouldn't be hard to find someone to make a mold for you. Heck if there is enough of a market I'd run them on my machine for amusement.
It looks like that mold is made from steel which is not my favorite thing to run, although the machine will run it fine it's just messy and harder. I prefer aluminum which may or may not be suitable for aluminum.