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.
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Recommended excavator weight4,400 – 8,800 lb
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Rated power29.5 hp (22 kW)
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Drum cutter length (A)28 in
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Cutter head width (B)19 in
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Cutter drum diameter (C)10 in
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Width of gearbox (B)19 in
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Recommended rotation speed140 rpm
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Recommended oil flow5 – 11 gal/min
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Max. oil flow13 gal/min
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Max. operating hydraulic pressure4,350 psi (300 bar)
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Max. torque at max. hydraulic pressure740 lbf·ft
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Max. cutting force at max. torque1800 lbf
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Max. uniaxial compressive strength3,700 psi (25 MPa)
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Weight380 lb
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Pick boxPH 14 Type
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Number of picks in cutter drums44 Pcs
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Number of picks in the cutter chain27 Pcs
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Standard pickER 15/29/26/14 C
