ElectroMag-Test-Jig

thingiverse

We needed a test rig that would gently and smoothly pull on an electromagnet for a science fair project. So, borrowing jsteuben's worm gear (www.thingiverse.com/thing:343922) we built this test rig. Changes to the original worm gear include: Reducing the diameter of the short axle shaft for the horizontal big gear so it will spin more freely. Splitting the vertical worm gear in half and flipping the upper half upside down so it will print the gear threads cleanly (no cleaning up after!) and adding a 10mm hex shaft to tightly hold the vertical gear together. We created a good crank handle to drive the worm gear. Also, we added a threaded shaft to the large horizontal gear so we could drive our project sled in and out very slowly.