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You are here: Home / Scouting Programs / How to Polish Your Pinewood Derby Car’s Axles and Wheels

How to Polish Your Pinewood Derby Car’s Axles and Wheels

March 20, 2019 by The Scouter Digest Staff

 

The quality of your Pinewood Derby car’s axles and wheels may be the most important factor in building a fast car. Here’s how to choose and polish your car’s axles and wheels.

Polishing Pinewood Derby Axles

1. Start with a set of raw axles.

axles-2

2. Can you tell the difference between the axles in the top row and the ones on the bottom? The ones on the bottom aren’t straight and will slow your car.

axles-3

3. To tell which are straight and which aren’t, mark each axle with a marker about 1/2 inch from the pointed end.

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4. Have an adult clamp a power drill into a vise, a device that will hold it perfectly still.

5. Have an adult help you insert each axle into the drill at the location you marked in Step 3. Have the adult turn on the drill.

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6. Bent axles will wobble as they turn in the drill. Straight axles will hardly wobble at all. Pick the ones that wobble least.

7. Once you’ve selected the four straightest axles, use a file or fine-grit sandpaper to remove small burrs and mold marks that can cause friction and slow a car. These imperfections should be removed from both the axles and the wheels. Watch this video to learn one way to do this.

8. Use polishing compound from the auto supply store to polish the wheels and axles. One easy way to do this is to clamp the axles back in the drill and let the drill spin the axle while you polish it.

9. When you install the axles and wheels, make sure they are aligned perfectly straight. You can test the alignment of your axles by pushing your car across a smooth floor or table. It should roll in a straight line.

10. Don’t forget to add graphite or another dry lubricant to your wheels and axles.

axles-feature

This post originally appeared on the online version of Boys’ Life Magazine at https://boyslife.org/hobbies-projects/pinewood-derby/151297/how-to-polish-your-pinewood-derby-cars-axles-and-wheels/. 

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Filed Under: Scouting Programs Tagged With: Cub Scouts, Pinewood Derby, PWD

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