Rammer 1655 background

The All new Rammer 1655 hydraulic hammers is suitable for carriers in the 12 to 20 tonne range, the 870 kg hammer with an impact rate of 500 - 940 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
  • Sound supressed
  • FBE (Fixed blow energy)
  • Lifetime warranty
  • Ramlube II (Optional)
  • Ramair (Optional)
  • Idle blow Protector (Optional)
  • Soft blow sensor (Optional)
  • Indexable power cell (left or right handed)
  • Flange mounting
  • Heavy duty housing
  • RamValve



  • Primary Demolition
  • Boulder Breaking
  • Trenching
  • Secondary Demolition
  • Asphalt Cutting


Minimum working weight, flange mounted *1 1090 kg 2400 lb
Bare weight 870 kg 1920 lb
Impact rate (frequency) 540 - 920 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 90 - 130 l/min 23.8 - 34.3 gal/min
Back pressure max 10 bar 145 psi
Input power 31 kW 42 hp
Tool diameter 115 mm 4.53 in
Pressure line connection (IN) SAE 6000 psi 1"
Return line connection (OUT) SAE 6000 psi 1"
Pressure line size  *3 26 mm 1.02 in
Return line size  *3 26 mm 1.02 in
Grease connection and Air connection (A) BSPP-internal 3/8"
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
Carrier weight, range  *4 12 - 20 t 26500 - 44100 lb
Noise level, guaranteed (2000/14/EC) 127 dB (A)
Noise level, measured (2000/14/EC) 123 dB(A)

*1   Includes average mounting bracket and standard tool
*2   Minimun setting = actual operating pressure + 50 bar or 725 psi
*3   minimum inner diameter
*4   Check carrier allowed attachment weight from carrier manufacturer. Check application requirements.

Specifications are subject to change without notice.


More Information

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