Rock Cutters

EK 20 Chain Cutter

The Kemroc EK 20 Chain Cutter delivers precision and efficiency, making it ideal for various excavation and construction tasks.

The EK range of chain cutters are the first of their type on the market. Designed for use on excavators from 2 to 70 tons, they are ideal for cutting stone with an uniaxial compressive strength up to 120 MPa. They are efficient, vibration-free attachments for the excavation of deep narrow trenches with the optimal trench profile. Trench width starts from 480 mm. Another application is mining of medium hard minerals with compressive strength from 15 to 80 MPa, where drill and blast is not possible.

KEMROC chain cutters excavate trenches no wider than absolutely necessary. The continuous chain, driven by the cutter drums, removes the material automatically from the space between the cutter drums. With standard drum cutters, the need to remove this material on technical grounds always results in trenches wider than the cutter. Keeping trenches to the minimum width possible saves unnecessary transport costs for removal of cut material and fill material becomes cheaper. The material produced by the chain cutter is fine grained and is ideal for use as fill.

EK chain cutters reduce wear and tear on the excavator swing gear. In addition, they give a 40 percent energy saving for equivalent production rates compared to conventional rotary drum cutters without the central chain.

  • Recommended excavator weight
    4,400 – 8,800 lb
  • Rated power
    29.5 hp (22 kW) 
  • Drum cutter length (A)
    28 in
  • Cutter head width (B)
    19 in
  • Cutter drum diameter (C)
    10 in
  • Width of gearbox (B)
    19 in
  • Recommended rotation speed
    140 rpm
  • Recommended oil flow
    5 – 11 gal/min
  • Max. oil flow
    13 gal/min
  • Max. operating hydraulic pressure
    4,350 psi (300 bar) 
  • Max. torque at max. hydraulic pressure
    740 lbf·ft
  • Max. cutting force at max. torque
    1800 lbf
  • Max. uniaxial compressive strength
    3,700 psi (25 MPa) 
  • Weight
    380 lb
  • Pick box
    PH 14  Type
  • Number of picks in cutter drums
    44 Pcs
  • Number of picks in the cutter chain
    27 Pcs
  • Standard pick
    ER 15/29/26/14 C 

See it in Action

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