A printed grinder in the shape of a grenade,
Print without support, it's all in the geometry!
For seeds, herbs and spices.
Assembly Video : http://youtu.be/812oWE_U3TY
EDIT 03/01/14 : Modified Inner grinding drum to have a conical top. Aids grabbing the medium to draw it into the teeth of - DOOM!
EDIT 02/01/14 : Added optional handle clip. FIRE IN THE HOLE!

Print without support.
TIP: Due to some internal female chamfers, it prints better as a plate or multiple quantities to allow cooling between layers and reduce the possibilities of dropped loops. However I do not have a print fan so YMMV.
I guess the video and images speak for themselves in terms of assembly.
To Use:
Pop your grinding medium into the spout and hold the grinder in your palm horizontally with the spout at the top (which helps contain the medium). Turn the handle clockwise to grind, when finished orientate the spout for pouring (to bottom) and keep turning the handle to allow the medium to flow out.
#####Disclaimers : Needs a few minutes of turning to bed in the grinding teeth and to remove any plastic burrs that may have built up during printing.

• Wash thoroughly.
• May contain nuts.
• Not for human consumption.
• Contains small parts.
• Flammable.
• Blah Blah Blah.