The Stanley CH18311 underwater hydraulic chipping hammer is a professional-grade, medium-duty percussion tool engineered for use in marine and commercial diving environments where precision chipping, scaling, and surface preparation of concrete, masonry, and rock are required. Built on the rugged CH18 platform, this compact tool balances power, portability, and maneuverability for operations in tight or confined submerged spaces.

Featuring an ergonomic “D” handle with an inside trigger, the CH18311 helps prevent accidental engagement while enhancing diver comfort and control. The handle is often plastisol-coated for further comfort during prolonged use. The tool is designed to accept .580″ hex shank, round-collar tool bits with a slide-latch retainer mechanism, allowing the use of standard chisels, points, and other accessory bits suited for chipping tasks.

This hydraulic chipping hammer operates on an open-center hydraulic circuit with a recommended flow range of 7–9 GPM (26–34 L/min) and typical working pressures of 1500–2000 PSI (105–140 BAR), with an optimum flow near 8 GPM. The tool weighs approximately 18.2 lbs (8.2 kg) and measures about 20″ (51 cm) in length, making it easy to handle underwater while offering sufficient impact performance for medium chipping applications. It is equipped with hose whips for fast connection, though quick disconnect couplers are usually sold separately.

Ideal for underwater construction, repair, demolition, and maintenance, the CH18311 provides dependable chipping power with excellent control and ergonomic design for professional divers and marine contractors.