Product Weight


Product Carrier Weight


Oil Flow Range
25-55 l/min

Rammer’s Small range are designed to deliver high blow frequency and power where and when you need it regardless of the application. The 255, 355 and 455 are your no fuss, Plug and play solution for carriers between 1.2 and 5.2 ton. Protected by their box type housing, these hammers produce less noise and vibration, whilst are strong enough to take a beating. Rammer’s plug and play theory makes installation quick and easy, and makes work with multiple carriers a dream.



  • Single lower tool bushing
  • Membrane type accumulator
  • CBE (Constant blow energy)
  • No tie rods
  • Light weight


  • Primary Demolition
  • Trenching
  • Secondary Demolition
  • Asphalt Cutting
  • Ground Compacting

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

  Metric Imperial
Weight 124 kg 270 lb
Working Length 946 mm 37.2 in
Minimum working weight, flange mounted *1 150 kg 330 lb
Impact rate (frequency) 800-3000 bpm  
Operating pressure 95-150 bar 1305-2175 psi
Pressure relief min *2 150-200 bar 2175-2900 psi
Pressure relief max 220 bar 3190 psi
Pressure in LP-circuit 38-40 bar 550-580 psi
Oil flow range 25-55 l/min 6.6-14.5 gal/min
Back pressure max 20 bar 290 psi
Input power 13.8 KW 19 hp
Tool diameter 48 mm 1.89 in
Pressure line connection (IN) BSPP-internal 1/2 inch  
Return line connection (OUT) BSPP-internal 1/2 inch  
Pressure line size *3 12 mm 0.47 in
Return line size *3 12 mm 0.47 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 weight optimum 1.9- 3.1 t 4200-6800 lb
Miniexcavator weight, range *4 1.6-3.6 t 3500-7900 lb
Skid steer, robot weight, optimum 1.3-2.1 t 2900-4600 lb
Skid steer, robot weight, range *4 1.1-1.2 t 2400-5300 lb
Noise level, measured (2000/14/EC) 114 dB(A)  
Noise level, guaranteed (2000/14/EC) 118 dB(A)  

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