Accessories for use with rotary drum cutters

By: Drumcutters  06-Dec-2011
Keywords: Hydraulic Oil, Hardened Steel, Quick Couplers


Rotators are an essential tool to obtain maximum productivity in specialist applications such as tunnel profiling, renovation of large surfaces, profiling diaphragm walls and working in limited space.  Erkat rotators are extremely robust as they have been designed to withstand the extremely high forces generated while working with rotary drum cutters.  The materials chosen for the worm gear components provide mating surfaces capable of transmission of these forces with maximum wear resistance.

Hydraulic oil flow is directed through an orbital distributor to enable the drum cutter to be rotated through a continuous 360 degress with hoses becoming tangled.  The range of rotators currently available are:

  • ERU 1 for excavators from 3 - 8 tons
  • ERU 2 for excavators from 9 - 15 tons
  • ERU 3 for excavators from 15 - 25 tons
  • ERU 5 for excavators from 34 to 50 tons

Adaptor Plates

Adaptor plates can be supplied for all excavators and standard quick couplers provided relevant information is available.  If the make or model of attachment is unknown please download the drawing from the section below and provide us with the dimensions shown.

To ensure the strength required to work with drum cutters, we recommend that adaptor plates are made from the following thickness steel plate:

  • ER 50                    15mm plate
  • ER 100                  20mm plate
  • ER 250 - 600         25mm plate
  • ER 650                  30mm plate
  • ER 1200 - 5500    40mm plate


The majority of picks shown in the Erkat catalogue are available from stock including picks fitted with the unique QuickSnap clips. Picks with  QuickSnap are only available from Drumcutters Ltd or Erkat and make the changing of picks quicker and easier.

Pick Boxes

The complete range of pick boxes are available from stock including heavy duty pick boxes fitted with hardened steel inserts for great wear resistance and longer working life.  Worn inserts can replaced once.  Contact us for details on how to change inserts.

Pick Extractor Tools

Extractor tools are available for all types of picks.

Downloads Relating to Product Range

Keywords: Drum Cutter, Extractor Tools, Gear Components, Hardened Steel, Hydraulic Oil, Mating Surfaces, Quick Couplers, Rotary Drum, Worm Gear,

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Other products and services from Drumcutters


Erkat rotary drum cutters; robust, reliable tools

Rotary drum cutters or rock cutters are hydraulic excavator attachments designed to increase the range of work available to excavators and increase their return on investment. Optimum cutting performance is achieved when the hydraulic motor in the drum cutter matches the hydraulic output from the excavator's pumps. Suitable for excavators 10 - 20 tons 65 kW power Fitted with one 65 kW hydraulic motor, recommended for material up to 50 MPa.


Grinders for tree stump removal or cutting

For those looking for the maximum flexibility with a drum cutter excavator attachment, the option of fitting special wood cutting picks into the standard pick boxes allows the drum cutters to achieve reasonable performance in wood cutting applications with low capital expenditure. Increased performance can be obtained from drum cutters supplied with special wood cutting drums fitted with non-rotating cutter teeth.


Longitudinal drum cutter - Drumcutters

Suitable ofr excavators 10 - 25 tons 65 kW output Same hydraulic motor as ER 400 L, ER 450L has 450mm and ER 600 L has 535mm diameter drum. Due to its unique design, people have found other applications where the longitudinal drum cutter can be used. Longitudinal drum cutters can be supplied with an adaptor that allows them to be used as an auger drive unit.


Auger drive units - Drumcutters

Owners asked whether their longitudinal drum cutters could be used as rotary heads so Erkat designed an adaptor that could be attached to the output shaft for this purpose. Although extremely useful for some applications, the standard longutidinal drum cutter plus adaptor was too long and too expensive for use as a dedicated auger drive unit.


drum cutter with cutter wheel or wheel cutter

Cutting short lengths of narrow, shallow trenches in hard material can be a problem especially when the length of trench does not justify the use of a full scale trenching machine. Drum cutters fitted with a wheel cutter provide an alternative solution and under the right circumstances can be extremely cost effective. ER 100 Max wheel dia 650 mm, max cutting depth 210 mm. ER 1200 Max wheel die 1000 mm.