Excellent 4.9 | 18,452 reviews

Stanley Underwater Hydraulic Grinder - GR29310

Stanley Underwater Hydraulic Grinder - GR29310

$2,079.99
$2,079.99 $2,772.69
SAVE 24% Sold out
Stanley Underwater Hydraulic Grinder - GR29310

Stanley Underwater Hydraulic Grinder - GR29310

$2,079.99
$2,079.99 $2,772.69
SAVE 24% Sold out

Stanley Underwater Hydraulic Grinder - GR29310

The GR29 is a right angle grinder that can be used for grinding and cleaning in underwater applications with a variety of wheels, brushes, and attachments. The high torque gear motor drives a standard 5/8-11” threaded spindle. A 9” adjustable wheel guard, two position assist handle and trigger guard are standard.

What our Experts Think
  • Designed for Underwater Surface Preparation: Built for commercial diving, offshore maintenance, and marine construction where reliable grinding and material removal are essential.
  • Powerful Hydraulic Performance: Delivers consistent grinding power for smoothing welds, removing corrosion, and preparing metal or concrete surfaces underwater.
  • Excellent Diver Control: Ergonomic handles and responsive trigger provide precise operation and improved stability, even while wearing diving gloves.
  • Marine-Grade Durability: Corrosion-resistant construction is engineered to withstand continuous exposure to saltwater and harsh subsea environments.
  • Professional-Grade Reliability: Stanley's proven hydraulic drive system ensures dependable performance, low maintenance, and long service life for demanding commercial underwater applications.
Q&A

Q: What is the Stanley GR29310 Underwater Hydraulic Grinder used for?
A: It is a heavy-duty hydraulic grinder designed for underwater grinding, weld preparation, surface cleaning, rust removal, and cutting in commercial diving applications.

Q: What hydraulic flow and pressure does it require?
A: It operates at 7–9 GPM (26–34 LPM) with a working pressure of 1,500–2,000 PSI (105–140 bar). The optimum flow is 8 GPM (30 LPM).

Q: What wheel size does the grinder support?
A: The GR29310 is designed for 9-inch (230 mm) grinding wheels, making it suitable for demanding underwater grinding tasks.

Q: Does it include a safety guard?
A: Yes. It features an adjustable wheel guard to help improve operator safety while maintaining clear visibility during grinding.

Q: Is it suitable for continuous underwater operation?
A: Yes. Its rugged hydraulic motor is built for reliable, continuous-duty performance in harsh underwater environments.

Q: Are hose whips and couplers included?
A: The grinder includes hose whips, while quick-disconnect hydraulic couplers are sold separately.

Maintenance Tips
  • Rinse thoroughly with fresh water after every underwater use.
  • Remove salt, sand, and grinding debris from the tool.
  • Inspect hydraulic hoses, fittings, seals, and couplers before operation.
  • Check the grinding wheel, guard, and spindle for wear or damage.
  • Verify hydraulic flow and pressure meet manufacturer specifications.
  • Keep moving parts clean and lubricated as recommended.
  • Tighten loose fasteners and replace worn grinding wheels promptly.
  • Store the grinder clean, dry, and with hydraulic ports protected.
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