On 06/04/2021 01:20, Fredxx wrote:
On 05/04/2021 21:59, Rod Speed wrote:


"Fredxx" wrote in message
...
On 05/04/2021 21:24, Roger Mills wrote:
On 05/04/2021 16:31, GB wrote:
On 05/04/2021 16:25, Richard wrote:
On 05/04/2021 16:13, GB wrote:
The typical price for a 20 kgs cast iron kettle bell is £50-70.
What's involved in making one?


Iron only seems to fetch about 10p per kg at the scrappy.

GIYF

How about this:
https://www.instructables.com/DIY-Ke...-for-under-10/



Concrete ones are much cheaper to buy than cast iron, but the
density of the material is different, and concrete ones are much
bulkier. The advantage, of course, is you don't need an iron
foundry to DIY one.


You could always use mercury rather than concrete.g

Lead has a density 20% less than mercury.

Tungsten seems a better bet! A bit less toxic too and on par with the
density of gold.

Depleted uranium works much better.

Depleted uranium - 19.050
Tungsten - 19.25

Sorry, ignore units and replace with SG.

I'm not so sure. Better at what?