AK 635 SA EcoPower Mobile

A fleeting glimpse on the 6 m wide feed hopper is enough to find out that the AK 635 SA EcoPower is destined for greater things. But not just in this respect the largest machine of the series stands out – there are numerous other features to back up its lead role in the area of high-speed grinding technology.

The semi-trailer is a 625 horsepower giant which, at about 18 meters in total length (including extended discharge conveyor), can be hardly overlooked. Measuring 12.4 m/2.5 m (length/width) in transport mode, the machine does not cause substantial problems when being moved though, and is ready for operation within a couple of minutes.

The flagship of the AK series is another example of how we always manage to create the best possible relationship between performance, efficiency and flexibility. Separating the drive units of the scraper floor and the swing-mounted feed roller, as well as the inclusion of our patented load-sensitive material feed technique ensure constant throughput and maximum capacity utilization.

To cap it off, there are many other optional features available to further enhance the already impressive performance of the AK 635 SA EcoPower – the choice is all yours!


The universal grinders of the Doppstadt AK series process green waste, yard  waste, biowaste, pre-shredded logs and roots, waste wood and wooden  pallets. For special applications, the AK grinders can be combined with  other Doppstadt products, such as shredders or screening machines.


  • Continuous grinding with maximum performance by means of load sensing material in-feed
  • 6 m feeding hopper and 8 m long discharge conveyor
  • Contaminant resistant thanks to free-swinging flails
  • Easy one-man operation and short set-up time
  • Large protection doors on either side and centralized lubrication points for easy maintenance
  • Separate power unit for feeder
  • Free-swinging flails of the flail drum (gyrating mass appr. 2,5 t (5,512 lb)are provided with easily individual replaceable flail tips that can be adjusted to the materials to be grinded (e.g. hard metal, armoured tips)
  • replaceable grinding basket*, the mesh size (30 - 400 mm / 1.2 -15.75'') determines the material grain size, *option

Technical data

Total weight (kg)32000
Length (mm)17870
Width (mm)2500
Height (mm)5200
Transport width (mm)2500
Transport height (mm)3930
Transport length (mm)12410
Engine typediesel engine
MakeMTU 6R 1500
Exhaust levelEUROMOT IV / Tier IV final
Motor power (kW / PS)460 / 625
Fuel tank (l)900
Torque (Nm)2900 Nm at 1300 rpm
Engine type2 MTU 6R 1500
Exhaust levelEuromot III A
Motor power (kW / PS)460 / 625
Torque (Nm)2900 Nm at 1300 rpm
Width (mm)1500
Length (mm)8000
Belt speed (m/s)2
Height (mm)5200
Width (mm)1750
Diameter (mm)1120
Speed (min-1)970-1140 rpm (dep. on engine speed)
Number of Flail teeth36
Loading width (mm)5770
Loading height (mm)2420

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