Excavator hydraulic milling cutter EK 220

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Overview
The EK 220 chain cutter for large excavators represents the upper limit of the EK chain cutters range, developed for excavation tasks where ground resistance, tool load, and structural stress define feasibility. Built on KEMROC’s patented continuous chain cutting principle, EK 220 is designed for applications that exceed the operating range of conventional heavy excavation attachments.

Primary benefits

• With 59,500 Nm at 400 bar, EK 220 provides torque well above mid-range models for demanding continuous cutting.
• Rated power of 220 kW ensures compatibility with large excavator hydraulic systems while maintaining mechanical safety margins.
• 120 kN cutting force enables steady engagement in high-strength rock and reinforced materials without relying on impact methods.

Application context
Matched to 50–70 t excavators, EK 220 is selected for projects requiring continuous, structure-driven excavation rather than intermittent impact breaking. The continuous chain cutting principle allows controlled material removal when resistance remains consistently high. EK 220 is verified for ground conditions up to 140 MPa uniaxial compressive strength.

Why choose EK 220?

• Engineered for the highest resistance levels: design prioritizes sustained torque and structural integrity over cutting speed.
• Specifically matched to large excavator platforms to operate within their hydraulic performance envelope.
• Continuous cutting reduces shock loads compared with impact tools, enabling predictable removal of hard or reinforced materials.

Key features & technical advantages (summary)

• Maximum torque: 59,500 Nm (at 400 bar).
• Maximum cutting force: 120 kN.
• Hydraulic configuration for continuous operation under extreme loads — recommended oil flow 550 l/min, maximum 650 l/min.
• Heavy-duty chain and pick configuration for durability and cutting stability (pick box PH 38 HD; cutter drum picks 44; cutter chain picks 58; standard pick ER 25/80/80/38 C).
• Operating weight approx. 5,900 kg for structural stability during extreme-duty operation.

Videos and media
Product page references an illustrative product video (YouTube) demonstrating EK 220 operation and typical applications.

Technical specifications

• Model: EK 220
• Recommended excavator weight: 50 – 70 t (110,000 – 155,000 lb)
• Rated power: 220 kW (295 hp)
• Drum cutter length (A): 2,400 mm (94 in)
• Cutting width (B): 920 mm (36 in)
• Cutter drum diameter (C): 990 mm (39 in)
• Recommended rpm: 45 rpm
• Recommended oil flow: 550 l/min (145 gal/min)
• Maximum oil flow: 650 l/min (172 gal/min)
• Maximum operating pressure: 400 bar (5,800 psi)
• Torque at 380 bar: 59,500 Nm (43,900 lbf·ft)
• Cutting force at 380 bar: 120 kN (27,020 lbf)
• Maximum rock compressive strength: 140 MPa (20,300 psi)
• Weight (operating): 5,900 kg (13,005 lb)
• Pick box type: PH 38 HD
• Number of picks in cutter drums: 44 Pcs
• Number of picks in the cutter chain: 58 Pcs
• Standard pick: ER 25/80/80/38 C
• Standard hole pattern: LB40
• Compatible rotation unit (KRM): KRM80