Pinewood Derby Axle Alignment Guide / Jig

Building a Pinewood Derby car? Getting the axles (nails) inserted perfectly straight is one of the hardest parts of the build. If the axle goes in at a downward or upward angle, the car will rock or wobble.
 

I designed this simple alignment jig to solve that problem. It slots directly into the pre-cut axle groove on the wooden block, guiding your axle insertion. It ensures your wheels sit flat and your car rolls straight!

How to Use

1. Position the Jig: Insert the small rectangular tab on the 3D printed part into the pre-cut axle slot on your wooden car block.
2. Hold Firmly: Press the flat face of the jig flush against the bottom of the car.
3. Insert Axle: While holding the jig in place, insert your axle (nail) into the slot. The jig acts as a guide to prevent the nail from angling downward as you push it in.