Re: cordless tool 18V to 12V converter

"Jim Wilkins" <muratlanne@gmail.com> writes:

"Richard Smith"  wrote in message news:m1il1x6u84.fsf@void.com...
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"Jim Wilkins" <muratlanne@gmail.com> writes:
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"Richard Smith"  wrote in message news:m134t3flmh.fsf@void.com...
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You are probably seeing the price in a pretty box with two
large-capacity batteries - 4Ah or 5Ah.
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I've used a large powerful drill to cut 4" holes for conduit in steel
and would rather not have to need to again. It was inside a
closet-sized electrical enclosure and when the hole saw jammed the
long-handled geared drill would continue for another quarter turn,
whether or not some part of me was in the way.
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The Makita is something of a beast too, but I use it outside. When
with a crew I feel like the squad member who has the machine gun.

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Got the DeWalt DCH263 - arrived.
Seems for-real - batteries I already have fit it, etc.
Bought a couple of SDS masonry drill-bits - 14mm and 10mm.
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Already have 14mm "feathers" - splitting wedges.
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Hope to take them to the mine next week and see if can split rocks -
this hard granite.
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The advice from Trow and Holden was about splitting granite neatly in
a quarry. The miners may have other ways to split it roughly to
dispose of it.
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The only way I've seen was with the hydraulic jackhammer on an
excavator, and it could take perhaps an hour to crack a large granite
boulder left from blasting and meant for fill. They drilled to blast
but not to break up the rubble.

Amazed at supplies store here in UK - one link was "black powder".
Followed the link - is used by stonemasons - makes total sense.
Will part rock from rock - but not shatter the rock - which a "modern"
blasting medium would.
So you saw unusable stone - for some reason - shape, flaws, etc.? -
which they had to break-up?
Probably mentioned previously - the task at the mine is said to be
because, although they used a brisant blasting medium, they didn't use
enough of it to shatter rock into easily-managed small stuff.
Which nett is usually much cheaper (?) than having to break up big
rocks.