Stanley Hydraulics 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.
Specifications
Capacity: 9” / 23 CM Wheel
Spindle: 5/8 – 11” Threaded
Circuit Type: Open Center
Flow Range: 4-12 GPM / 15-45 LPM
Working Pressure: 1000-2500 PSI / 70-175 BAR
Full Relief Setting: 2250 PSI / 155 BAR
RPM: 3200 @ 12 GPM / 45 LPM
Weight (w/Guard): 15 LBS / 6.8 KG
Length: 11” / 28 CM
Width (w/Guard): 10 1/4” / 26 CM
Hydraulic Ports: -8 SAE O-Ring
Comes With Couplers: No
Comes With Whips: No
Manual
Download the GR29 Spec Sheet!
What Our Experts Think
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High-Powered Performance: Delivers efficient grinding and cutting with strong torque and RPM for underwater applications.
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Built for Tough Environments: Features corrosion-resistant materials to ensure durability in harsh marine conditions.
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Consistent Hydraulic Power: Provides steady and reliable operation without the limitations of electric or pneumatic grinders.
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Ergonomic & Diver-Friendly: Designed with a comfortable grip and low vibration for reduced fatigue during extended use.
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Versatile Applications: Perfect for underwater metalwork, weld prep, and precision cutting.
Q&A
Q: What is the Stanley GR29310 Underwater Hydraulic Grinder?
A: The GR29310 is a high-torque underwater hydraulic grinder designed for cutting, grinding, and cleaning in marine construction and commercial diving.
Q: What materials can it grind or cut?
A: It is ideal for grinding metal, cutting marine growth, removing corrosion, and prepping surfaces for underwater repairs.
Q: What hydraulic flow rate does it require?
A: It operates at 10-15 GPM for optimal performance.
Q: What makes it ideal for underwater use?
A: It features a corrosion-resistant construction, a powerful hydraulic motor, and an ergonomic handle for diver comfort and precision.
Q: What industries use the GR29310?
A: It is widely used in underwater construction, ship maintenance, offshore drilling, marine salvage, and infrastructure repair projects.
Maintenance Tips
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Pre-Use Inspection – Check hoses, fittings, and seals for leaks, wear, or damage.
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Flush After Use – Rinse with fresh water to remove salt, silt, and debris.
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Hydraulic Fluid Check – Use manufacturer-recommended oil; monitor levels and contamination.
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Grinding Disc Maintenance – Inspect for cracks, wear, or imbalance; replace as needed.
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Seal & O-Ring Care – Regularly inspect and replace worn seals to prevent leaks.
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Hose & Connection Checks – Ensure all hydraulic connections are secure and undamaged.
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Proper Storage – Store in a dry, ventilated area away from extreme temperatures.
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Follow Manufacturer Service Guidelines – Adhere to scheduled maintenance for peak performance.
