Plastic Shredder

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The shredder is the first machine we are building for the Precious Plastic project as all the other machines require small, somewhat uniform pieces of plastic as their raw material.

Precious Plastic Shredder


Precious Plastic Shredder Basic V2.0

Plastic Shredder.jpg
Synonyms: DE: Kunststoffschredder, Plastikschredder,
Kunststoffschneidmühle, Plastikschneidmühle
Type: Plastic Shredder
Material: plastics
Location: Precious Plastic Area
Access Requirements: Plastic Shredder Introduction
Status: Operational
Manual: Precious Plastic Academy (some build specifics will differ!)
Tutors: Lukas

This shredder is used to convert plastic waste into flakes that can be used in Precious Plastic projects.

We have a small selection of perforated metal plate (Lochblech) that could be adapted (cut and perhaps re-drilled) to be the "sieves" determining the particle size that comes out of the shredder.

Original Build

build instructions

Armin got the laser cut parts and two flange bearings in 2018.

Lukas contributed a piece of 27 mm (Schlüsselweite) hexagonal steel.


  • 3 kW, approx. 1500 rpm Drehstrom-Asynchron-Motor
  • gearbox: 20:1
  • electronic components:
    • emergency stop: TBD (similar to the one at the CNC router)
    • 1xMotorschutzschalter 6,3-10A Gekauftes Modell:
    • 2xLeistungsschutzschalter mit Hilfskontakten Gekauftes Modell: DIL EM 01 G mit 22 DIL E
    • 2xLeuchttaster für rechts- linkslauf
    • Stopp Taster
    • 3Phasen Hauptschalter


Other materials include threaded rods and other metal parts that we should already have at the Space.


Schredder Wendeschützschaltung.png