Product Weight


Product Carrier Weight


Oil Flow Range
40-120 l/min

Rammer's 777 heat resistant hydraulic hammer, has been designed to withstand the toughest of applications that this size of hammers may be utilized in. Heat resistant seals and heavy duty housing protect vital components and ensure that no job is too tough.


  • Single lower tool bushing
  • Membrane type accumulator
  • Twin-handed
  • No tie rods
  • CBE+ (Constant blow energy plus)
  • Flange mounting
  • Heavy Duty Housing
  • Heat Resistant Seals


  • Metallurgical industry

Compatible with Standard Chisel Tool, Moil Point Tool, Asphalt Cutting Parallel Tool, Asphalt Cutting Traverse Tool, Compacting Plate Tool and Special Tool Grease.

  Metric Imperial
Weight 315 kg 690 lb
Working Length 1449 mm 57.0 in
Minimum working weight, flange mounted *1 385 kg 850 lb
Impact rate (frequency) 500-1700 bpm  
Operating pressure 90-40 bar 1305-2030 psi
Pressure relief min *2 140-190 bar 1305-2030 psi
Pressure relief max 220 bar 3190 psi
Pressure in LP-circuit 36-38 bar 520-550 psi
Oil flow range 40-120 l/min 106-31.7 gal/min
Back pressure max 20 bar 290 psi
Input power 28 KW 38 hp
Tool diameter 80 mm 3.15 in
Pressure line connection (IN) BSPP-internal 3/4 in  
Return line connection (OUT) BSPP-internal 3/4 in  
Pressure line size *3 19 mm 0.75 in
Return line size *3 19 mm 0.75 in
Optimum oil temperature 40-60°C 104-140°F
Allowed oil temperature range -20-80°C -4-176°F
Optimum oil viscosity at operating temperature 30-60 cSt  
Allowed viscosity range 20-1000 cSt  
Miniexcavator, tractor backhoe weight, optimum 4.9-7.8 t 10800-17200 lb
Miniexcavator, tractor backhoe weight, range *4 4.3-9.5 t 9500-20900 lb
Skid steer, robot weight, optimum 3.3-5.2 t 7300-11500 lb
Skid steer, robot weight, range *4 2.6-6.3 t 5700-13900 lb
Noise level, measured (2000/14/EC) 120 dB(A)  
Noise level, guaranteed (2000/14/EC) 124 dB(A)  

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