Product Weight


Product Carrier Weight
21-32 t


Oil Flow Range
140-200 l/min

Rammer 2577 hydraulic hammers is suitable for carriers in the 21 to 30 tonne range, the 1,700 kg hammer with an impact rate of 450 to 750 blows per minute, features Rammer’s Fixed Blow Energy operating principle that ensures optimum impact energy with every blow, regardless of hydraulic flow fluctuations.


  • Membrane type accumulator
  • Twin-handed
  • Sound suppressed
  • FBE (Fixed blow energy)
  • Lifetime warranty
  • Ramlube I (Optional)
  • Ramlube II (Optional)
  • VIDAT tie rods
  • Idle blow protector (Optional)
  • Soft blow sensor (Optional)
  • RamValve


  • Primary Demolition
  • Boulder Breaking
  • Trenching
  • Secondary Demolition
  • Tunneling

Compatible with Standard Chisel Tool, Hard Rock Chisel Tool, Limestone Chisel Tool, Long Chisel Tool, Moil Point Tool, Pyramid Tool, Standard Blunt Tool, Long Blunt Tool, Long Moil Point Tool, Ramlube l, Ramlube ll, Ramair, Special Tool Grease and Special Tool Grease cartridge for Ramlube ll

  Metric Imperial
Weight 1460 kg 3220 lb
Working Length 2299 mm 90.5 in
Minimum working weight, flange mounted *1 1760 kg 3880 lb
Impact rate (frequency) 450-750 bpm  
Operating pressure 135-145 bar 1960-2105 psi
Pressure relief min *2 190 bar 2755 psi
Pressure relief max 220 bar 3190 psi
Oil flow range 140-200 l/min 37.0-52.8 gal/min
Back pressure max 10 bar 145 psi
Input power 48 KW 64 hp
Tool diameter 135 mm 5.31in
Pressure line connection (IN) SAE 6000 psi 1 1/4 in  
Return line connection (OUT) SAE 6000 psi 1 1/4 in  
Pressure line size *3 26 mm 1.02 in
Return line size *3 32 mm 1.26 in
Grease connection BSPP-internal 3/8 in  
Air connection (A) BSPP-internal 3/8 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 30-60cSt  
Allowed viscosity range 20-1000cSt  
Carrier weight, optimum 23-30 t 50700-66100 lb
Carrier weight, range *4 21-32 t 46300-70500 lb
Noise level, measured (2000/14/EC) 120 dB(A)  
Noise level, (2000/14/EC) 124 dB(A)  

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