Nemo drill driver 2 Does anybody have any experience in using the Nemo drill diver 2 for underwater drilling. I am aiming to anchor down some cages onto the seabed composed of limestone at depth of about 8 m (i.e. relatively soft rock). Now I have seen this drill on the internet
https://nemopowertools.com/product/nemo-v2-divers-edition-50m-showcase/
and it appears it could be a good alternative to the pneumatic drills which are more expensive and their use appear to involve far more logistics. I would love to hear some experiences of drilling underwater and which pieces of equipment work best.
Many thanks already
Hi Hilmar,
We do quite a bit of drilling underwater for our monitoring site set up. We have a spitzner drill.
http://www.spitznas.de/en/products/drills/hammer-drills/sds-plus.html
Nemo drill looks good in theory. the video looks pretty convincing. If it has a good hammer action it should work. if not then it is prob useless. we had an old underwater drill with no hammer action and it was ineffective. the spitznas is not too cumbersome. need a few spare cylinders to take down with you or with your buddy. got video of it somewhere if you want to see. let me know if I can help anymore. cheers, Charlie
Hi Hilmar I think that Ben Harvey has been doing something similar in Japan this year. I'm not sure if I can link to him on there but I'll get in touch and tell him to have a look at this thread.
Best wishes
Ally
https://www.researchgate.net/profile/Ben_Harvey3
contact HEPCA in the Egyptian Red Sea http://www.hepca.org/contact and look at the attached document
We have anchored 6 m diameter floating cages in the Bay of Bengal at 10-12 m depth along the Andhra coast (East coast of India). A gabion box (3 x 2 x 3 m) that was filled with 3.5 t of granite stones was used to anchor a cage through 16 mm iron chain and 32 mm pp rope for demonstration of open sea cage culture of black tiger shrimp and Asian sea bass for a period of 3-8 months. The 6 m diameter cage could withstand two cyclones that occurred during demonstration period. Strength of gabion box as well as connecting cods (chain and rope) depends upon the prevailing oceanographic conditions such as waves and currents including periodical cyclonic storms.
All the best for your cage culture
Thanks everyone for their comments and contributions especially to Ben and Charles!
Hilmar & Charlie,
If you do use the Spitznas please remember that there are bits in there that are not entirely 'marine grade'. The salt water gets in so it needs a lot of freshwater, love and attention to keep working between uses. Also, as Charlie says, the hammer action is essential. Always have a back up plan as they do tend to break. If you do invest in a Nemo drill I would be very interested to hear how it works out, so please post an update.
Good luck!
Indeed Liz, they do require a lot of flushing through and disassembling and regreasing after each use!
Looks like Nemo will put a more powerfull hammer drill on the market soon
https://nemopowertools.com/product/nemo-sds-rotary-hammer/
This might be the one to buy....
I've only used pneumatic drills but they are less cumbersome than you think. I used a small generator to power a small compressor on a small boat and drilled 1.0-cm holes at 2-3 m in a concrete wall to anchor hydrophones. The biggest problem I had was getting leverage. The Nemo does sound good, though.
HI Hilmar,
Did you get one of these drills? the rotary hammer one looks like it could be really useful...
Cheers,
Charlie
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