Stanley GR29310 Underwater Hydraulic 9" Grinder

The Stanley GR29310 Underwater Hydraulic Angle Grinder (GR29) is a rugged, professional-grade hydraulic grinder engineered for demanding underwater applications. Built with a high-torque Stanley Hyrevz gear motor and a standard 5/8-11″ threaded spindle, this right-angle grinder delivers reliable performance with a wide range of grinding wheels, brushes, and cleaning attachments. Its sealed hydraulic design is ideal for commercial diving operations, hull maintenance, and underwater surface preparation.

Designed with diver comfort and versatility in mind, the GR29310 features an adjustable 9″ wheel guard to suit various cutting and grinding angles, a two-position assist handle that accommodates left or right-handed use, and an oversized trigger with guard for secure operation. The plastisol-covered handle provides an ergonomic grip that minimizes heat transfer, while stainless-steel fasteners and a cast-in lifting eye enhance durability and usability in harsh marine environments.

With a flow range of approximately 4–12 GPM and an optimal speed around 3200 RPM at 12 GPM, this tool balances power and control for efficient underwater cutting, grinding, and surface cleaning. Its compact form factor and hydraulic reliability make it a dependable choice for professional divers and industrial aquatic contractors.