Homemade, extremely dangerous paper Shredder using a 7,5 kW motor and mower blades at 1500 RPM.
In contrast to typical shredders this one operates at very high rotational speed. This made the build process easier, but also makes the machine much more dangerous.

Specification

Components

Mechanical

• 2x 40mm shaft
• 12x Blade of rotary mower
• 2x V-Belt (one is mounted in a way to reverse the direction of rotation)

Motor

• Brand: AEG
• Power: 7,5kW
• Rotation speed: 1450RPM
• Voltage: 380V
• Frequency: 50Hz
• Type: Three phase asynchronous motor

Control

• Star-Delta switch on the motor
• Optional box with contactors to reverse the rotating direction
• Power supply
  • Mains 3~ 400V 50Hz
  • Synchronous generator 3~ 30-90Hz

Videos

Normal operation

2019.08.30

With Generator (overdrive)

2020.05.20

Timelapse

2020.03.16

Gallery