Some repairs simply sit below the waterline. A cracked seawall, a loose ladder bracket on a dock, a fitting on a pool wall, a fastener on a boat that cannot wait for the next haul-out. For years the choices were to drain it, dry-dock it, or hire a crew with air or hydraulic gear. Nemo Powertools changed that by building cordless tools that are made to run underwater, and we carry the line here at 4K Bowen, a disabled-veteran, family-owned company in Mayo, Florida.
This guide walks through the common underwater jobs and which Nemo tool fits each one, using the specs published for each tool.
Pool, Pond and Fountain Work in Shallow Water
Most pool technicians and marina staff work in a few feet of water, not a hundred meters. For that work the Nemo Waterproof Drill - 5M is the practical starting point. It is rated for salt, fresh or chlorinated water down to 16.4 ft (5 m), with a maximum torque of 345 in-lbs (39 N-m), two speeds (0 to 400 and 0 to 1500 RPM), a 1/2 in (13 mm) chuck, and it runs on one 18V 3Ah lithium-ion battery. That covers anchoring fixtures, drilling for brackets and fastening in a pool, pond or fountain without draining it. It is listed at $850.98.
Boat Hulls and Docks: The Divers Drill
When the work moves to a dock piling, a boat hull or an offshore structure, depth rating matters. The Nemo V2 Divers Edition Drill - 50M is rated to 50 m (164 ft), carries an IP68 rating, and keeps the same 39 Nm dual-speed motor (0 to 400 / 0 to 1,500 RPM) and 13 mm chuck. Nemo built it for commercial divers, pool repair technicians and offshore maintenance crews. It is listed at $1,870.52.
For scientific, research and deeper commercial work, the Nemo Special OPS Diver Drill - 100M reaches 100 m (328.08 ft), ships with two 18V 6Ah lithium-ion batteries, and includes a water pressure balance kit for control underwater. Nemo describes uses from tagging coral reefs to cleaning barnacles off boats and yachts. It is listed at $2,100.00.
Concrete, Brick and Stone: Seawalls and Piers
Seawall and pier repair means masonry, and masonry calls for a hammer drill. The Nemo Hammer Drill - 50M drills cement, brick and stone underwater or on land, is submersible to 50 m (164 ft), delivers 0 to 21,000 impacts per minute on high speed, and comes with two 18V 6Ah batteries. It is listed at $1,945.27.
If the job is deeper, the Nemo Special Ops Hammer Drill - 100M keeps the same 0 to 21,000 IPM capability, extends the rating to 100 m (328 ft), includes two 18V 6Ah batteries and a water pressure balance kit. It is listed at $2,184.00.
Fastening Below the Waterline
Driving lag screws and fasteners into dock framing or marine structures is where an impact driver earns its place. The Nemo Impact Driver - 50M is submersible to 50 m and comes with two 18V 6Ah batteries. Nemo built it for commercial divers, construction workers and HVAC technicians, so it works on land between dives too. It is listed at $1,853.39.
Cutting Pipe, Timber and Metal
Salvage and demolition jobs need cutting tools. The Nemo Reciprocating Saw - 50M has a 1-1/8 inch stroke, keyless blade clamp, variable-speed trigger, a net weight of 3.5 kg, and a 50 m rating, with two 18V 6Ah batteries. It cuts pipe, timber and metal underwater. One note from the manufacturer: it is not to be used above water for longer than 5 minutes of continuous use. It is listed at $2,584.45.
For metal cutting and grinding on piles and offshore structures, the Nemo Angle Grinder - 50M V2 is rated to 50 m and lets divers swap batteries underwater, so you can take as many batteries below as the job needs. It ships with two 22V 6Ah Li-ion batteries and is listed at $3,327.99.
See the Work and Keep the Hull Clean
Low visibility slows everything down. The V3 Nemo Flood Light - 15000 Lumens puts out 15,000 lumens from 18 Cree LEDs plus 10 UV LEDs, with five intensity levels and underwater battery replacement. It is listed at $759.67. For regular hull maintenance without a haul-out, the Nemo Hull Cleaner Electric Brush uses a 12 inch rotating brush, a 900 watt brushless motor, and one 18V 10Ah battery rated for over 2 hours of run time, submersible to 50 m. It is listed at $1,691.09.
Planning a Job
- Match the depth rating to your deepest work, with margin.
- Pick the tool for the material: drill for wood and fiberglass, hammer drill for masonry, saw or grinder for cutting.
- Bring spare batteries for long dives.
- Follow the operator's manual for every tool, and dive within your training and certification.
Shipping on these tools is set by the vendor, since each one ships directly from the manufacturer's supplier. Your checkout shows the shipping cost before you pay.
Frequently Asked Questions
Can Nemo tools be used on land?
Yes. The hammer drills, impact driver and drills are described as working both underwater and on land. The reciprocating saw should not run above water for more than 5 minutes of continuous use.
Which Nemo tool works in a chlorinated pool?
The Nemo Waterproof Drill - 5M is rated for salt, fresh or chlorinated water to 16.4 ft (5 m).
What is the deepest-rated Nemo tool we carry?
The Special OPS Diver Drill and Special Ops Hammer Drill are both rated to 100 m.
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