KEMROC KR 120 Rotary Drum Cutter in Trenching Project.
Mounted on Kobleco SK350 | Cutting Hard Limestone in Dubai, United Arab Emirates.
Project Overview
When contractors face trenching projects in hard limestone, productivity, precision, and cost control become critical success factors. On a major infrastructure project in Dubai, United Arab Emirates, a contractor selected the KEMROC KR 120 Rotary Drum Cutter mounted on a Kobelco SK350 excavator to excavate trenches through limestone with a compressive strength of 70 MPa (10,153 psi).
The project required the excavation of trenches measuring approximately 6,500 mm in length, 1,400 mm in width, and 5,000 mm in depth, presenting significant challenges for conventional excavation methods.
Why the Contractor Chose KEMROC?
The contractor’s primary reason for selecting KEMROC over alternative solutions was simple: higher productivity.
Traditional methods often generate excessive vibration, overbreak, and large quantities of unsuitable excavation material. By contrast, the KEMROC KR 120 hydraulic drum cutter provided controlled excavation, enabling the contractor to achieve precise trench dimensions while maintaining continuous production over several months of operation.
Reliable Performance in Hard Rock Conditions
Equipped with durable round attack picks, the KR 120 rotary drum cutter demonstrated exceptional efficiency while excavating through challenging limestone formations. Pick consumption averaged only four picks per 100 cubic meters, highlighting the durability and cost-effectiveness of the KEMROC solution.
As a high-performance rotary drum cutter, the KR 120 delivered smooth and controlled rock excavation, making it an ideal trenching drum cutter for demanding infrastructure applications.
Valuable Reusable Backfill Material
One of the most significant advantages achieved on this project was the production of high-quality fine excavation material.
Unlike conventional breaking methods that create oversized and irregular rock fragments, the drum cutter attachment generated fine, reusable backfill material directly during excavation. This reduced the need to import additional backfill, lowered transportation costs, and minimized waste disposal requirements. For contractors working on utility corridors, pump station construction, manhole construction, precast manhole installations, and other infrastructure developments, this benefit can create substantial project savings.
Versatility Beyond Trenching
The KR 120 belongs to KEMROC’s proven family of drum cutters, widely used for deep excavation, shaft excavation, shaft sinking, concrete renovation, and controlled demolition applications.
KEMROC excavator drum cutters are frequently selected for projects requiring precision rock removal, including applications involving excavator rock cutter operations, drum cutter for surface profiling, transverse drum cutter work, and specialized excavation projects. Similar technology is also used in underwater drum cutter attachment applications and as an excavator drum cutter for mining where controlled material removal is essential.
Conclusion
This project in Dubai demonstrates how the KEMROC KR 120 high-torque drum cutter attachment helped the contractor achieve superior trenching productivity while producing valuable reusable backfill material in extremely hard limestone conditions.
For contractors seeking a reliable drum cutter excavator solution capable of increasing productivity, reducing operating costs, and improving excavation quality, the KEMROC KR 120 Rotary Drum cutter continues to prove why it is one of the industry’s leading rotary drum cutter technologies.
