Rolling Cookie Cutter

This is my take on a cookie cutter I have seen in videos and photos, but never IRL. By rolling the cutter over the sheet of dough it'll quickly cut out a row of neat cookies.

Update 2023-01-25
The initial upload of this model was more of a test than anything else, and the models hadn't actually been tested to see if they actually worked. Now, they have been tested (and redesigned) and they do print and work as intended. Models have all been marked as version 1 (previous upload was more of an alpha release).

Printing parts

The cookie roller comes in two models (for now), heart and Christmas tree, and you'll need to print both halves for each model (I figured it would be easier to print them that way).

No supports are needed, and the rollers all have small built-in brims around the cutter edges to help them stick to the bed when printing.

I've printed these with a 0.4 mm nozzle, 0.2 mm layer height, 2 perimeters and 10 % infill (pretty standard, in other words). The bracket can benefit from some more infill (less flex), and both the bracket and handle can easily be printed at a larger layer height without any drawbacks. The rollers need 0.2 mm layer height for the sake of the thin cutting parts of the print (might work with larger layer heights, but I have not tested and in theory the quality should go down).

Assembly

Print all the parts separately and assemble with M3 and M5 screws and nuts. You'll need 4 M3x12 mm screws with accompanying nuts and 3 M5x25 mm screws (I used internal hex head) together with 2 nylon locking nuts. The design allows for the M3 screws to be between 10-15 mm long, and the M5 screws to be between 20-40 mm long.

The roller halves is put together with M3 screws and nuts, and there is also space to add two M5 locking nuts inside the roller. These will later be used to attach the roller to the bracket. The handle is screwed onto the bracket with the M5 screw, directly into the plastic of the handle.

Rollers

Heart

The heart roller is simply a large heart, nothing more to it…

Tree

This roller has 2 Christmas trees on it (or 3, if you're careful). The design is made so that there is no wasted cookie dough when making these, and if you're careful when lining up the next pass of the roller with the previous it is possible to use the outer half-trees of the roller to create a continuous pattern of trees without any breaks.