Screw Size Keychain

Overview:

In this activity you will make a keychain used to check the size/threads of popular screws used in robotics.  More specifically it will check threads for  ¼-20, 10-32 and 8-32 screws.  This project will also develop your skills in measurement and tool use including - Compound Square, Vertical Band Saw, Hammer and Punch, Drill Press, Belt Sander, and Taps. Please note that if a team works with mostly metric screws, it would be relatively simple to drill and tap metric screw sizes with the same design below. 

Mechanical Drawing