This is a replacement part for the Bodum Bistro Electric Burr Coffee Grinder (model 10903). This is the plastic ring that fits around the burr wheel and joins it to the hopper at the top. It appears you can order replacement parts for almost everything else in this machine, but not this ring.
This was printed on a Replicator 2 with support and raft and fit with no modification. Insert the burr wheel into the ring, lock the ring into the grinder, and place the hopper into the opening of the ring.
This was done in completely parametric OpenSCAD. It is entirely possible your printer may have different tolerances than mine. If so and your part doesn't fit, just change the tolerances at the beginning of the scad file and re-render.