Four-shaft shredder / cardboard / wood / metal
RS30/40 UNTHA shredding technology


  • Number of shafts:


  • Application:

    cardboard, wood, metal, for medical waste, paper, plastic

  • Other characteristics:

    rugged, compact

  • Power:

    Min.: 11000 W

    Max.: 44000 W

  • Rotational speed:

    23 rpm (144.51 rad.min-1), 24 rpm (150.8 rad.min-1)


The reliable and heavy duty UNTHA 4-shaft RS30 and RS40 series shredders have been tested and proven over several decades and were specifically designed for a broad application range. The shredding machines can be operated as stand-alone solutions or integrated into complex systems where they tend to be a favourite thanks to their very compact design.

The high reliability of the small RS series is a result of the machine's rugged cast-iron frame design and the sturdy cutting unit. The low-speed, 4-shaft shredders are not sensitive to foreign objects and are very low maintenance. Thanks to the pull-in mechanism the shredder does not need a hydraulic pusher system, which further reduces the need for maintenance. The low speed of the cutting shafts ensures low noise and dust emissions in your operations.

The machines are particularly productive thanks to the high torque in combination with a large perforated screen surface and are a favourite for multi-shift operations. In the event that foreign objects are pulled in, the shredder automatically shuts down thereby preventing greater damage to the cutting unit. The shredder is additionally equipped with an automatic reverse to prevent motor overload.


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