EK 40 | Chain Cutter for Mid-Size Excavators
High-Torque Trenching Attachment for 7–11 Ton Excavators
- Cutting depth of up to 1,300 mm
- 500 mm cutting width
- Reduced vibration and noise
- Suitable for urban environments, roadside works, and projects near existing structures
- High-Torque Cutting Performance
The EK 40 Chain Cutter for mid-size excavators is part of the EK Chain Cutters range, KEMROC’s patented chain cutting system developed for precise trenching and controlled excavation without impact. The EK range replaces conventional breaking methods with a continuous cutting principle, allowing contractors to achieve accurate trench geometry, predictable cutting performance, and reduced vibration across demanding job sites.
Designed for mid-size excavators in the 7–11 ton class, EK 40 bridges the gap between compact trenching solutions and heavy-duty excavation tools. Instead of relying on percussive force that generates excessive noise, vibration, and irregular profiles, the patented cutting chain delivers smooth material removal, low-noise operation, and consistent results. With the ability to cut soil, asphalt, concrete, and soft to medium rock formations up to 30 MPa UCS, EK 40 is well suited for utility installation, urban infrastructure works, roadside projects, and renovation environments where precision, safety, and productivity are essential.
- Recommended excavator weight7 – 11 t 15,500 – 24,500 lb
- Rated power44 kW 59 hp (44 kW)
- Drum cutter length (A)1.300 mm 51 in
- Cutter head width (B)500 mm 20 in
- Cutter drum diameter (C)475 mm 19 in
- Width of gearbox (D)375 mm 15 in
- Recommended rotation speed80 rpm 80 rpm
- Recommended oil flow70 – 90 l/min 18 – 24 gal/min
- Max. oil flow120 l/min 32 gal/min
- Max. operating hydraulic pressure380 bar 5,500 psi (380 bar)
- Max. torque at max. hydraulic pressure5,700 Nm 4,200 lbf·ft
- Max. cutting force at max. torque24 kN 5,400 lbf
- Max. uniaxial compressive strength30 MPa 4,400 psi (30 MPa)
- Weight750 kg 1,650 lb
- Pick boxPH 20 Type PH 20 Type
- Number of picks in cutter drums52 Pcs 52 Pcs
- Number of picks in the cutter chain49 Pcs 49 Pcs
- Standard pickER 16/46/38/20 C ER 16/46/38/20 C
Why Choose the EK 40 Chain Cutter?
Optimized for Mid-Size Excavators
EK 40 is engineered specifically for excavators in the 7–11 ton range, offering higher output than compact models while maintaining excellent machine balance and control. With a rated power of 44 kW, it delivers strong cutting performance without overstressing the carrier.
Deeper, Wider, and More Controlled Trenching
With a cutting depth of up to 1,300 mm and a 500 mm cutting width, EK 40 enables deeper trenching and higher productivity per pass. The controlled cutting process ensures straight trench walls and uniform profiles, reducing rework and backfilling effort.
Low Vibration & Low Noise Operation
The continuous cutting chain significantly reduces vibration and noise compared to hydraulic breakers, making EK 40 suitable for urban environments, roadside works, and projects near existing structures.
• Maximum torque: 5,700 Nm at 380 bar • Maximum cutting force: 24 kN This torque level allows EK 40 to maintain stable cutting in compact soils and cohesive rock formations without stalling or excessive tool wear.
• Recommended oil flow: 70–90 l/min • Maximum oil flow: 120 l/min • Maximum operating pressure: 380 bar These parameters ensure seamless integration with modern mid-size excavators without the need for hydraulic system modifications.
• 52 picks on cutter drums • 49 picks on cutter chain • Pick box type: PH 20 • Standard pick: ER 16/46/38/20 C The optimized pick configuration ensures even wear distribution, extended service life, and reliable cutting performance in abrasive conditions.
With a weight of 750 kg, EK 40 maintains excellent stability on mid-size excavators, improving operator control and reducing mechanical stress on the boom and stick during continuous operation.
Main Applications of the EK 40 Chain Cutter for Mid-Size Excavators
Utility and Infrastructure Trenching
Ideal for installing water, gas, electrical, and fiber-optic lines, EK 40 produces clean, accurate trenches with minimal surface disruption—particularly valuable in urban and roadside projects.
Asphalt and Concrete Cutting
EK 40 efficiently removes asphalt layers and concrete structures, preparing surfaces for repair or replacement while maintaining precise cut edges.
Selective Excavation and Renovation
The controlled cutting process allows accurate material removal in rehabilitation and renovation projects, minimizing damage to surrounding structures.
Trenching in Soft to Medium Rock
Designed for materials up to 30 MPa UCS, EK 40 performs reliably in limestone, claystone, compacted soils, and similar formations where conventional trenching methods become inefficient.
FAQ
What excavator size is EK 40 designed for?
It is designed for mid-size excavators in the 7–11 ton class.
Is EK 40 suitable for urban projects?
Yes. Its low vibration and low noise operation make it suitable for urban infrastructure and roadside works.
What materials can EK 40 cut?
Soil, asphalt, concrete, and soft to medium rock formations up to 30 MPa UCS.
When should EK 40 be selected instead of smaller EK models?
EK 40 is ideal when greater cutting depth, higher torque, and increased productivity are required compared to compact-class chain cutters.
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