Rammer 777

Rammer 777

All Rammer hammers come fully CE compliant , supplied by Sandvik, Lahti, Finland. They are manufactured in accordance with ISO standards.
Minimum working weight, kg (lb) 385 (850)
Impact rate, bpm 500-1700
Operating pressure 90-140 (1305-2030)
Pressure relief, max bar (psi) 220 (3190)
Oil flow range, I/min (gal/min) 40-120 (10.6-31.7)
Back pressure, max bar (psi) 30(435)
Input power, kW (hp) 28(38)
Tool diameter, mm (in) 80(3.15)
Miniexcavator weight, allowed range t (lb) 4.0-9.5(8800-20900)
Skid steer, robot weight, allowed range t (lb) 2.6-6.3(5700-13900)
Noise level, measured sound power level, LWA, dB 120
Noise level, guaranteed sound power level, LWA, dB 124


Increase Your Productivity

  • CBE(Constant Blow Energy) +
  • A biult-in Pressure Adjusting Valve (PAV) maintains hydraulic pressure levels to ensure that every blow delivers the maximum power possible for optimum productivity. CBE operating principle enables wide oil flow range and tolerates hammer against high back pressure allowing a wide range of carrier utilization
  • Membrane type accumulattor +
  • Membrane type accumulator eliminates nitrogen leakages and removes the need for time consuming recharging.
  • Comparison of Riding Comfort +
  • Cab Damper Mounting

    Multi-Layer Viscous Mount
    Conditions:- Floor vibration while travelling forward at high speed over obstacles.
  • Wide tool selection
  • Reliable Partner

  • Lower tool bushing with tool seal +
  • Field replaceable design with grooves for grease retention and dust seal for wear protection. This provides excellent alignment between piston and tool. The tool seal keeps grease in the hammer and dust outside increasing life time of parts.
  • Side plates attached to front head +
  • Side plates are bolted into front head with screws and loads are carried through front head. Hydraulic parts are not subjected to bending forces

    Minimise Your Maintanance Costs

  • Simple tool retaining system +
  • Reliable, simple and easy replace of tool anywhere in a matter of minutes. O-rings for grease retention and dust damage prevention.
  • Ramlube I +
  • Ramlube I - Machine-mounted greasing device as a retrofit provides correct greasing level to protect the tool and tool bushing and reduce owning and operating costs.

    Protect Your Working Environment

  • Pressure adjusting valve (PAV) +
  • PAV allows easy adjust of operating pressure on field without oil spilage.

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