[Coral-List] Drill Inquiry

[Edson Faria Jr]

Hello David, as I answered to Margaret, I am using it to drill hard granite
and works well. But I am using 6mm drilling bits for making small holes
(around 4 cm deep).

For sure it would be much easier to drill limestone. But I think it is not
strong enough to make a 1-meter core (if I understood well the length of
your core).

About the operation depth, it works until 50m deep, and the brand has one
special model that works until 100m deep.

Hope this helps.

Best regards.

Edson Faria Júnior

Biólogo/Mestre em Ecologia - CRBio 081980
Pesquisador Projeto Coral-Sol
BrBio - Instituto Brasileiro de Biodiversidade

PADI Dive Instructor

2018-05-16 8:12 GMT-03:00 David Weinstein <dweinstein at rsmas.miami.edu>:

> 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
>
> > _______________________________________________
>
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>
> > 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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