Erkat rotary drum cutters work under extremely hard conditions in trenching, demolition, rock excavation and tunnelling, in steel mills as in other unusual applications. This puts very high demands on the cutter drums and cutting tools.
The result of many years experience, with machines working in thousands of applications aroand the world, can be seen in the type of picks used and their cutting pattern on erkat equipment. This unique combination provides maximum productivity with minimum wear, ensuring the economical performance of erkat drum cutters even in the hardest conditions. Modern technology and continuous product development are the basics for ensuring the economic benefits of using our drum cutters and cutting tools.
The type of picks and their pattern on the cutter drum determines how effectively rock is cut which requires specialist knowledge and expertise in geology and cutting technology.
It is the pick that breaks portions of rock out during the cutting operation. Due to the range of rock types, their hardness and toughness, a variety of drum design are required to achieve optimum penetration in each type of rock.
The tungsten carbide insert braised into the body of the pick is at the heart of the cutting operation and is subject to extreme stresses due to it coming continuously into contact with the rock.
The pick body, (head and shaft ) is made from heattreated steel and serves as the support for the tungsten carbide insert and also as protection for the pick box. The tungsten carbide insert is extremely wear resistant and tough to withstand impact.
The insert is a sintered material made up of tungsten carbide with a cobalt binder. Depending on application, a variety of carbide grades and shapes are available.
Retaining clips ensure that picks do not fly out of the pick boxes. Various types of retaining clip are available depending on pick type and application area e.g. retaining collars for soft rock or circlip type systems for hard rock applications.
For quick and easy changing of picks, erkat offers the QuickSnap retaining system, which allows picks to be changed in a matter of seconds. This represents a saving of over 50% in time compared with normal circlip or knock on retainer systems.
The transverse drum cutter is ideally suited for trenching, tunneling, special foundation work, demolition and for soil mixing. The operating characteristics of Erkat special drum cutters allow them to be used in noise and vibration sensitive areas.
The ERC range from Erkat represents a new generation of revolving rotary drum cutters that extends significantly the number of applications suitable for transverse drum cutters.
Longitudinal drum cutters are driven by a powerful radial piston motor creating extremely high cutting forces. The robust cutter drums together with their secure fixing method enable them to operate in the most demanding conditions. Consoles can be supplied with different lengths to suit a variety of applications.