Greetings all! I'm looking for the heaviest material that doesn't take up a lot of space. Essentially to operate as a weight. Thanks for any helpful advice!

Would be helpful to know what the weight is for, as certain materials could be ruled out.

Osmium is a good choice.

Fishing weights are cheap and convenient and come in a dizzying assortment of sizes and shapes. However, not good for an environment where toxicity is a concern -- or did they stop making them out if lead?

If you have a lot of time, browsing the metals category on Ebay can be useful. I've found things like thick brass rings for a very low price. They make pretty good nose cone weights on larger model rockets. They were clearly scrap from some project.

For that matter you might search on "ball mill media" or "Ball mill balls" or "ball mill weights" or some such.

>> fink said:

Osmium is a good choice. Click to expand...

$400 USD a troy ounce ! :D