The incredible Filament Killer Gun (Filament Pelletizer Shredder)

Low Cost Filament Pelletizer.
(filament leftovers and falsely manufactored filament does not do well in conventional shredders, so you need something like this to give your plastic another try becoming better filament next time).
STL Files included, but thing must be adapted to the Steel Tube it uses and of course, to your drilling machine. So it's only to make clear how it works.

Drilling can be used in both directions; if used with normal drilling direction, the Filament feeded into the single hole ot the top of the stell Tube will come out pelletized through the 3 connected Holes (photo). With backward direction, they come out of the top.
It's as fast as you can feed it, but builds up heat - make brakes and don' use PLA for the tube holder. There is another tiny hole in the Steel Tube for mounting (connected with the topmost screw).

I drilled the holes into the steel tube with something completely different in mind, so the feeder hole could be much narrower than you see on the photos.

I used a Ball Bearing for guiding the driller, but I think it is not really necessary.
It shreds very fine pellets (as also to be seen on the pictures)