Re: cordless tool 18V to 12V converter

On 15/03/2024 20:22, David Billington wrote:

On 15/03/2024 18:35, Richard Smith wrote:

http://www.weldsmith.co.uk/tech/minerals/240314_rocksplit/240314_rocksplit_drill_feathers.html
"Rock-split granite with "cordless" SDS drill and "feathers""

Yeaay!

 Have you tried or considered the old method of dry wood hammered into the holes and then wetting it, not something I've tried but an article here https://www.researchgate.net/figure/Rock-split-by-using-the-swelling-pressure-of-wood-Egypt-2001_fig5_267834899 .

I believe there is a modern high-tech variant, famously exemplified when Jason Statham uses an expanding plug to crack the glass bottom of a mid-air swimming pool.
Ah yes, Dexpan, Crackamite and/or Expando. I thought it was real ...
Peter Fairbrother