Product Weight


Product Carrier Weight
34-55 t


Oil Flow Range
250-320 l/min

The 3,750 kg Rammer 4099 PRO is based on the field proven Rammer 4099 hammer and shares with it many key features that have established that unit as one of the most popular large hammers in the world.

These standard Rammer 4099 features are backed by a range of enhancements that help the 4099 PRO withstand extreme working conditions. The unit benefits from a sealed housing structure that prevents the ingress of dust and dirt, thereby extending the working life of both the hammer and the tool. A top cover plate has sealed through apertures for stump hydraulic hoses and features sealed hose connections for grease, air and water. The hammer has a sturdy housing design and wear resistant wear plates that make it perfect for horizontal working duties in applications such as tunneling.


  • Membrane type accumulator
  • Sound suppressed
  • FBE (Fixed blow energy)
  • Ramlube I (Optional)
  • Ramlube II (Optional)
  • Ramair (Optional)
  • Ramdata II
  • VIDAT tie rods
  • Stroke selector
  • Indexable power cell (left or right handed)
  • Flange mounting
  • RamValve
  • PRO / tunnel suspension
  • PRO / Tunnel Housing


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

 Compatible with Standard Chisel Tool, Hard Rock Chisel Tool, Tunneling Hard Rock Chisel, Limestone Chisel Tool, Tunneling Limestone Chisel Tool, Tunneling Chisel Tool, Moil Point Tool, Pyramid Tool, Tunneling Moil Point Tool, Standard Blunt Tool, Super Blunt Tool, AGW Unit, Ramlube l, Ramair, Ramdata ll and Special Tool Grease.

  Metric Imperial
Weight 3050 kg 2720 lb
Working Length 3182 mm  
Minimum working weight, flange mounted *1 3750 kg 8270 lb
Impact rate, long stroke 360-560 bpm  
Impact rate, short stroke 540-670 bpm  
Operating pressure 135-145 bar 1960-2105 psi
Pressure relief min *2 210 bar 3045 psi
Pressure relief max 230 bar 3335 psi
Oil flow range 250-320 l/min 66.0-84.5 gal/min
Back pressure max 12 bar 175 psi
Input power 77 KW 175 hp
Tool diameter 166 mm 6.54 in
Pressure line connection (IN) SAE 6000 psi 1 1/4 in  
Return line connection (OUT) SAE 6000 psi 1 1/4 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 30-60 cSt  
Allowed viscosity range 20-1000 cSt  
Carrier weight, optimum 37-50 t 81600-110200 lb
Carrier weight, range *4 34-55 t 75000-121300 lb
Noise level, measured (2000/14/EC) 124 dB(A)  
Noise level, guaranteed (2000/14/EC) 128 dB(A)  

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