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Shredder built without frame

Javier (Singular MARS) javierrivera

Shredder built without frame

20/09/2017 at 13:53

Hey all!
I built a shredder!

Just wanted to leave my feedback in case anyone wants to try this slightly different way of building the shredder..

A steel main plate (lasercut) can be used if you don’t have welding facilities (Couldn’t get around not welding the sieve). Then you can mount that steel plate on top of a bench, wood or aluminium. Others in the forum and me too recommend not to mount the shredder directly on wood as it’s not strong enough, but using this steel plate it will take all the torque loads.

Also on the one on the video I mounted the shredder off the gearbox, which was massive, through another steel plate. This was fine but as the shredder module isn’t very robust by itself, when jamming it tried to twist on itself.

learned: that would be solved by having a plate where the shredder is mounted horizontally, as in the other picture
also learned: Use keyways for the coupling, otherwise it can slip when it jams and score the shafts.

motor: 1.1 kW single phase, 380 Nm, 18 rpm, gearbox size 90, 80:1 ratio
during (“stress testing benchmarking study”) testing it was able to chop polycarbonate 5 mm thick, plywood and even small pieces of aluminium and steel screws

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