Trammel with Pencil Holder

thingiverse

Create a trammel tool by printing two point holders or one point holder and a pencil holder for wood and paper marking. Drill 6-32 screw holes with a #27 drill, and the point holder hole with a 17/64 or size F drill. Clear out string slots using a hacksaw blade, add points to 1/4 inch steel bar, and press nuts into hexagonal cavities followed by installing 6-32 x 1-1/4 round head screws. Slide holders on a 1/4 inch square bar with an angled cut end for easy sliding and lock using screws. File bar ends to avoid cuts while using the trammel, and enjoy your custom tool.