Excavator hydraulic milling cutter EK 20

for mini excavators

Overview
The EK 20 Compact Excavator Chain Cutter is a precision trenching attachment for 2–6 ton compact excavators. Using KEMROC's patented continuous cutting chain principle, it provides low-vibration, accurate trenching and selective excavation in soil, asphalt, concrete and soft to medium rock up to 25 MPa UCS.

Key benefits

• Cutting depth up to 1,000 mm for controlled trench profiles
• Consistent trench width of 390 mm for predictable installations
• Lower vibration and noise compared with percussive tools, reducing disturbance
• Suitable for installation of cables, pipelines, drainage and service ducts
• Effective on materials up to 25 MPa compressive strength

Applications

• Utility trenching (cables, pipelines, service ducts)
• Selective excavation and precise material removal
• Asphalt and lightly reinforced concrete cutting for repair works
• Trenching in soft to medium rock (up to 25 MPa)

System description
The EK 20 belongs to the EK Chain Cutters family and replaces impact-based excavation with a continuous cutting chain system that delivers clean cuts, consistent trench geometry and reduced environmental impact. It is engineered to integrate with compact carriers while preserving machine stability and hydraulic performance.

Technical specifications

• Recommended excavator weight: 2 – 6 t (5,000 – 15,000 lb)
• Rated power: 22 kW (30 hp)
• Drum cutter length (A): 1,000 mm (39 in)
• Cutting width (B): 390 mm (15 in)
• Cutter drum diameter (C): 325 mm (13 in)
• Recommended rpm: 75 rpm
• Recommended oil flow: 30 l/min (8 gal/min)
• Maximum oil flow: 70 l/min (18 gal/min)
• Maximum operating pressure: 400 bar (5,800 psi)
• Max. torque at 380 bar: 2,400 Nm
• Cutting force at 380 bar: 15 kN
• Max. rock compressive strength: 25 MPa (3,600 psi)
• Weight: 315 kg (695 lb)
• Pick box: PH 14 Type
• Number of picks in cutter drums: 56 pcs
• Number of picks in the cutter chain: 54 pcs
• Standard pick: 15/29/26/14 C
• Standard hole pattern: LB10
• Compatible rotation unit (KRM): KRM30