[Coral-List] Drill Inquiry

[Margaret Miller]

Thanks to all who provided very helpful feedback to my request regarding
the Nemo drills.  I will provide a short summary here but please contact me
offline if you would like a more complete compilation.

It seems that most users doing small attachment holes or short coral cores
(ie. for experimental replicates, not geology/growth records) were quite
happy with performance, even in granite substrates (difficult but doable).
Battery performance was reported good, lasting longer than a dive for the 3
amp battery (30 to upward of 100 drill holes per charge).

That said, there are also many experiences of faulty or malfunctioning Nemo
units.  In most but not all cases, the manufacturer dealt with these issues
to satisfaction.  It is not clear if the issue of defective units has been
improved in recent time.

As with all drills, many respondents emphasized the importance of rigorous
care/maintenance regime.

I did not hear from anyone that was successfully using the Nemo drill for
geological cores.



On Wed, May 16, 2018 at 7:12 AM, David Weinstein <dweinstein at rsmas.miami.edu
> wrote:

> Hello Margaret and others,
>   I was wondering if anyone had any more information about these battery
> 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 University
> Interuniversity 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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>>
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>>
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>>
>>
>>


-- 
*Margaret W. Miller, PhD*
*Research Director*
*SECORE International*
*www.secore.org <http://www.secore.org>*
*614.973.3559*
m.miller at secore.org