Hydraulic Hammer (Breaker) Size Guide Gorilla .
SMALL HYDRAULIC BREAKERS (HAMMERS): up to (1627 Joules), are typically used in concrete and other light duty work. MEDIUM HYDRAULIC BREAKERS (HAMMERS): 1200 – (1627 – 5423 Joules) are used in both concrete and rock applications with limitations on the size and amount of material to be broken.