For wheel loads up to 40 tonnes

DRS and DRS-M wheel block systems

DRS and DRS-M wheel block systems: Modular system for tailor-made solutions

Our DRS wheel block system is a versatile travel wheel system for heavy-load handling applications. With the DRS-M, we have enhanced this system further and added new features to it. Both product ranges can be seamlessly integrated into Demag modular drive systems: Eight finely graded sizes provide the right wheel block for every application:

  • DRS-M 112 to 200 (load capacity from 2.75 to 10 t)
  • DRS 250 to 500 (load capacity from 16 to 40 t)

And the large selection of travel wheels and special wheel designs make it possible to adapt them to almost any travel rail or operating conditions. Cost-effective and ready to install. Further strengths:

  • High performance range and maximum load capacity
  • Many travel wheel shapes available as standard as well as customer-specific designs
  • Four variants for connection to the customer’s superstructure
  • High-quality housing with optimum protection for the travel wheels and bearings
  • High rigidity
  • Direct connection of optional accessories
  • Laser alignment system for wheel blocks on multiple travel units

DRS-M wheel blocks also come with additional features:

Prepared for accessories

  • Flexible planning
  • Thanks to integrated threaded boreholes, optional accessories such as
    • guide rollers or
    • rail sweepers
  • Can be installed direct on the wheel block – or simply added later, as required

Fixed alignment


The innovative installation connection enables wheel blocks to be replaced quickly without the need for time-consuming readjustment. This fixed alignment element can be attached to the steelwork and ensures that the wheel block remains precisely positioned even after it is replaced.

Mechanical wear measurement


Wheels need to be checked regularly. Besides its flange wear indicator, DRS-M also makes it easy to inspect the travel wheel tread. This mechanical wear indicator can be used to check the current state of wear on the wheel – at standstill and regardless of the wheel position. The result can be easily read on a colour scale.

Your Contact

Demag contact

Demag Cranes & Components GmbH

Postfach 67
58286 Wetter

+49 (0) 2335 92-0
+49 (0) 2335 92-7676

Product information

The benefits at a glance

Exact configuration

  • Eight sizes with load capacities from 2.75 to 40 tonnes per wheel
  • Wheels in various shapes and designs – made of spheroidal-graphite cast iron (GGG 70), polyamide, or with Hydropur tyres

DRS-M Baureihe

A:  Guided on both sides by flanges for rail systems

B:  Wheels without any flanges, optionally fitted with lateral guide rollers, also with concave shape or contour to customer specifications

D:  Wheels guided by a flange on one side for units running at floor level

E:  Larger diameter wheels without a flange for increased ground clearance

S:  Wheels in V, trapezoidal, or concave shape for guided applications

F:  Flangeless travel wheels with Hydropur tyres for high acceleration & quiet running characteristics

C: Flangeless, concave polyamide wheels for quiet operation that is kind to the runway

Many connection options

Prepared mounting surfaces for virtually any connection: from top and end connection arrangements with bolted and welded connection elements, to side and pin connection arrangements

DRS-M 42476-5

K: Top connection

B: Pin connection

S: End connection

W: Side connection

Custom solutions

Tailored solutions
  • Complete travel units with precisely matching geared motors from the Demag modular drive system
  • High rigidity thanks to special stiffeners
  • High ground clearance for wheel blocks thanks to compact system design – also for complete drive units with gearboxes designed to match the wheel load
  • Horizontal guide roller arrangements and buffers in various sizes and designs (optional)

Easy to install

  • Housings ready for direct connection to superstructures
  • Easy connection to superstructures thanks to tight housing design and position tolerances and high dimensional accuracy in all planes
  • Laser alignment system for simple and precise alignment of wheel blocks (DRS)
  • Fixed alignment (DRS-M)
  • Simple wheel replacement without the need for re-alignment of top connection thanks to asymmetrical housing
  • Wheel blocks can also be moved and aligned laterally after they have been installed in hollow sections and beams (for top, end and pin connection arrangements)

Minimum maintenance

  • Cast housing enclosed on five sides reliably protects the travel wheels against any mechanical influence
  • Generously dimensioned grooved ball bearings which are lubricated for life, tapered roller bearings from size DRS 250
  • Travel wheels made of self-lubricating spheroidal-graphite cast iron (GGG 70) for low friction and high resistance to wear
  • Integrated wear indicator on wheels with flanges for remote visual diagnosis
  • Optional travel wheel wear indicator based on colour scale (DRS-M)

Optimal design support

  • Optimum support for project engineering and design work – e.g. with CAD files in various formats – thanks to our web-based planning tool

Technical data

Dimensions (DRS with spheroidal-graphite cast iron travel wheel with two flanges)

DRS technical data
Size Max. load capacity Travel wheel dia. Weight Dimensions [mm]
  [t] [mm] [kg] a1 b1 b2 c1 h1
DRS-M 112 2.75 112 7.3 190 47 80 96 131
DRS-M 125 5 125 9.9 220 60 80 98 147.5
DRS-M 160 7 160 18.3 275 65 89 110 187
DRS-M 200 10 200 35.7 340 65 101 130 238
DRS 250 16 250 62 385 75 110 150 281
DRS 315 22 315 117 470 90 130 180 349.5
DRS 400 30 400 201 580 110 155 210 440
DRS 500 40 500 352 700 110 170 240 566

Options and accessories

  • Torque brackets for connection to offset and angular geared motors
  • Horizontal guide rollers
  • Buffers in various sizes and designs
  • Rail sweeping system
  • Solutions for high-temperature applications
  • Hardened travel wheels