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Task 2, Rotor Body Fabrication: part numbers 3, 4 & 5 in the image in step 1

Cut hardboard to form the rotor body

The rotor body’s diameter is dependent on the size of the stir bar you will be using (as discussed in Rotor Mount Fabrication). Our rotor is 38 mm in diameter and 5 mm thick

Drill two screws (or holes, if you’re using machine screws) through the bottom base of the hardboard.

Install the magnetic strip rotor atop the drilled hardboard using the corresponding nuts

Glue magnets onto the metal strip on the hardboard rotor. Magnet distance should be about 80% of the length of the stir bar.