What is a hydraulic rock breaker for an excavator and how does it work?

Expert Answer

A hydraulic rock breaker, also called a hydraulic hammer, is an excavator attachment used to break rock, concrete, asphalt, and reinforced demolition material with repeated high-energy blows. It runs from the excavator’s auxiliary hydraulic circuit, which powers an internal piston. That piston strikes a tool bit, transferring impact energy into the material below. Performance depends on matching the breaker to the machine’s hydraulic flow, pressure, carrier weight, and the job material. Common tool options include moil points, chisels, and blunt tools for different applications. Good setup also includes correct hose routing, proper mounting bracket geometry, and operator technique to avoid blank firing and excess heat. VANROCK manufactures and supplies hydraulic rock breakers for excavators and can help size the hammer correctly for your carrier, hydraulic settings, and typical work so you get productive breaking without overstressing the machine.

Answered by VANROCK specialists · Published 8/10/2026