[Coral-List] Drill Inquiry

[David Weinstein]

Hello Margaret and others,  I was wondering if anyone had any more information
about thesebattery operated underwater rotary or hammer-drill systems Margaret
asked about.  Specifically, we are wondering if they are strong enough to
actually take short cores (about a m) through coral limestone substrate such
that the cores have a diameter of around 5 cm?  We would like to do some simple
drilling but want to make sure these electric systems are strong enough to fit a
coring tube onto them and retrieve a core (specifically at 45 m).  Thank you.
David Weinstein
---Zuckerman Postdoctoral  Scholar
Hebrew UniversityInteruniversity Institute for Marine Sciences in Eilat
http://www.rsmas.miami.edu/users/dweinstein/







On Sun, Apr 29, 2018 12:39 AM, Dennis Hubbard dennis.hubbard at oberlin.edu  wrote:
Hi Margaret:




I wasn't familiar with this unit so I did a little surfing. It appear that

it is pretty much a cordless drill but with some sort of waterproofing. I

do have a fair bit of experience with what look like similar units in a

wood-working setting and have spent a lot of time tinkering with everything

from small throw-away pneumatic systems to larger.... and much larger....

coring systems. Unless there is something extraordinary in the battery life

and torque, my sense is that you're going to be frustrated on both fronts

unless your goal is to insert small pins as markers.




I know that Rich Berry lurks on the site and when I have any questions on

suck things, he's been my most dependable resource. If he reads this, I

hope he will contact you. If not, let me know and I'll ask his opinion

offline and try to get the two of you together. He's spent more time around

rugged and crazy marine hardware than anyone I know.




Best,




Dennis




On Mon, Apr 23, 2018 at 1:06 PM, Margaret Miller <m.miller at secore.org>

wrote:




> Dear Coral-Listers,

> We are contemplating a significant investment in one of the new battery

> operated underwater rotary (Nemo V2 Divers Edition) or hammer-drill (Nemo

> Divers Hammer Drill). I would appreciate to hear from folks who may have

> experience with either of these. How many holes on one battery charge (3

> vs. 6 amp)? What types of reef substrate have been successfully (or not)

> drilled. Please email me off-list with any advice.

>

> Many Thanks,

> --

> *Margaret W. Miller, PhD*

> *Research Director*

> *SECORE International*

> *www.secore.org <http://www.secore.org>*

> *614.973.3559*

> m.miller at secore.org

> _______________________________________________

> Coral-List mailing list

> Coral-List at coral.aoml.noaa.gov

> http://coral.aoml.noaa.gov/mailman/listinfo/coral-list

>










-- 

Dennis Hubbard

Chair, Dept of Geology-Oberlin College Oberlin OH 44074

(440) 775-8346




* "When you get on the wrong train.... every stop is the wrong stop"*

  Benjamin Stein: "*Ludes, A Ballad of the Drug and the Dream*"

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