Bialetti coffee grinder knob

thingiverse

I love my Bialetti coffee grinder but the handle knob has always been wobbly. I dont think its a great design (Amazon customers also complaining about it), eventually the original metal rod fell out so I had to be super careful when grinding. Thats until I got my Ender3 V2..... This is a replacement knob. You will also need an M4 bolt (20-25mm) and Nut (the nut metal but one of those with some plastic/nylon in it so it acts like a nut lock kind of thing. The bolt goes in from the bottom and the Nut sits in the printed part, it should just fall in the top, shake it about a bit to make it fit into the Hex hole (you can see it in the slice). The original metal bar and hence hole was about 3mm so you will need to expand the hole in the metal arm with a 4mm drill, It was pretty easy with an electric drill. I also placed large a washer between the metal bar and the printed part (you cant see it in the photo) just to avoid errosion but I dont think its really needed. Time for a coffee :-)