Attachment

H120 S Hammer

Cat® H120 S Performance hammers are hydraulic attachments designed for rock breaking, concrete demolition, and site preparation tasks. Commonly used in construction, roadwork, trenching, and demolition applications, these hammers deliver consistent breaking performance in demanding jobsite conditions.

Equipment Highlights

Automatic hammer operation

Provides blank firing protection by stopping piston movement when no material is beneath the tool. An internal buffering system helps reduce machine vibration, and standard silencing supports operation in noise-regulated environments.

Adjustable impact control

Allows operators to select high piston speed or maximum power settings. An oil-fired operating cycle delivers power with each blow, while critical hydraulic components are protected within the hammer housing.

Simplified service design

Includes standard onboard autolube for continuous greasing during operation. Features a slip-fit, 90-degree rotatable lower bushing for field replacement, an oil-fired design that eliminates gas charge checks, and convenient maintenance access points.

Integrated asset tracking

Cat asset tracking is available on all hammers. Attachment location and status can be monitored in VisionLink™, and geofence alerts can be configured when assets leave designated site boundaries.

Video Library

Specs + Downloads

Specs

Blows per Minute: 350 to 620

Tool Shaft Diameter: 4.7 in

Rated Flow - Maximum: 45 gpm

Rated Flow - Minimum: 26 gpm

Maximum Carrier Weight: 59500 lb

Minimum Carrier Weight: 35300 lb

Minimum Operating Weight: 3256 lb

Maximum Operating Pressure: 2175 psi

Minimum Operating Pressure: 1885 psi