The video below was uploaded 2 weeks ago.
In the video, cave diggers are using a gas-powered drill in a confined space
to enlarge a tight lead.
Skip to 4 minutes 34 seconds into the video.
http://www.youtube.com/watch?v=sma6bgcBhws
I hope the passage had some good air-flow.
Shouldn't the driller be wearing a scuba tank or at least an air-filter
mask ? He could die doing this, or at least get a major headache, or
get dizzy and trip and fall in the cave and hit his head. Right ?
http://www.cavediggers.com/Ryobi.pdf
This type of drill is not readily available at retail
hardware stores, or even tool supply shops, but only from specialty
industrial vendors.
The Ryobi model appears to be more portable than the other models
I see advertised on-line, plus it is a hammer drill.
They do not make the Ryobi anymore, but there are apparently
better models available:
http://www.wolverinetough.com/hammer-drills/
http://www.amazon.com/STAR-Hammer-Capacity-Functions-SDS-PLUS/dp/B005IZE19S
These are at least $ 600 plus tax, plus the
cost of the drill bits ( $ 40 ? ).
You want to make sure the drill is a hammer-drill before spending
lots of money on one.
All the portable models appear to require a 2-stroke fuel-oil mixture.
You could possibly order one directly from China, but the shipping cost is
rumored to be very expensive.
David Locklear
Ref:
http://www.jdvproducts.com/downloads/ca115.pdf
http://www.superiorsales.com/assets/files/SSS%20PDF%20web%20pages/Gas%20Tools/Gas%20Hammer.pdf
http://www.jdvproducts.com/downloads/ca115.pdf
http://compare.ebay.com/like/330601770090?var=lv<yp=AllFixedPriceItemTypes&var=sbar
http://www.nsmetals.com/viewitem.php?groupid=1&productid=1&ccDDMetalDetectorsLtd=7e877048c6e65e863e1219b2f5189a98
http://new_orleans-la.geebo.com/merchandise/view/id/798778-prostar_equipment_sds_plus/
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