Arrowhead R55 Hydraulic Post Driver Tie-rod-less hammer design Narrow round box provides superior access to surfaces in confined spaces such as trenching work Vibration and sound supressed at standard The hammer can be fully serviced using no specialist tools Powerful gas fired operation using less oil at lower working pressures Excavator friendly HAMMER SPECIFICATION UNIT R55 Max energy per blow J 680 Require flow lpm 40-60 Operating pressure bar 110 Blows per min per min 700-1250 Guaranteed sound power dB 117 Tool diameter mm 55 Working weight kg 200 Carrier weight Tonnes 2.8 - 4