How To Polish Axles Pinewood Derby

How to Polish Axles for a Winning Pinewood Derby Car

The Pinewood Derby is a thrilling race, and a polished axle can give your car a significant speed advantage. A smooth, friction-reducing axle means less resistance and more speed down the track. This guide will walk you through the process of polishing your axles to perfection, helping you achieve that winning edge.

Understanding the Importance of Polished Axles

The axles are the heart of your Pinewood Derby car. They're the connection point between the wheels and the body, and any friction at this critical juncture directly impacts your car's speed. Even a tiny amount of friction can significantly slow down your car. Polishing your axles reduces this friction, leading to a faster race time.

Friction is the Enemy

Friction is the force resisting motion. Rough axles create more friction than smooth ones, resulting in slower speeds. By polishing your axles, you create a smooth, slippery surface, minimizing friction and maximizing your car's potential.

Tools and Materials You'll Need

Before you start polishing, gather these essential items:

• Pinewood Derby Axles: These are the axles that came with your kit.
• Fine-grit Sandpaper: Start with a coarser grit (around 200-400) and gradually move to finer grits (600-1000, then 1200-2000).
• Polishing Compound: A jeweler's rouge or automotive polishing compound will work well.
• Soft Cloth: A clean, soft cloth is crucial for polishing and buffing.
• Small Container: To hold your polishing compound.
• Optional: Drill (with a slow speed setting) and a polishing attachment: This can expedite the process.

Step-by-Step Polishing Guide

Caution: Always prioritize safety. Wear safety glasses to protect your eyes during the sanding and polishing process.

Step 1: Cleaning the Axles

Start by thoroughly cleaning your axles to remove any dirt, grease, or debris. A gentle wipe with a soft cloth is usually sufficient.

Step 2: Sanding the Axles

This is where you'll remove any imperfections. Use your fine-grit sandpaper, starting with the coarser grit. Hold the axle securely and gently sand the entire surface of each axle, applying even pressure. Gradually move to the finer grits, always sanding in the same direction. Each grit progressively refines the surface, leading to a smoother finish.

• Key Tip: Don't rush this process. Take your time and ensure each grit removes the scratches left behind by the previous grit. The smoother the surface, the less friction.

Step 3: Polishing the Axles

Once you've reached the finest grit sandpaper, you're ready to polish your axles to a high shine. Place a small amount of polishing compound onto your soft cloth. Apply gentle pressure and rub the cloth along the length of each axle. Continue polishing until the axles are shiny and smooth.

• Key Tip: If using a drill and polishing attachment, use a slow speed to avoid overheating the axles.

Step 4: Final Inspection

After polishing, inspect your axles. They should be mirror-like in their shine. If any imperfections remain, repeat the polishing process.

Maintaining Your Polished Axles

To keep your axles polished and prevent the buildup of friction, store them in a protective case or wrap them in a soft cloth when not in use. This will help maintain the smooth finish and ensure your car performs at its peak during the race.

Frequently Asked Questions (FAQs)

Q: Can I use toothpaste to polish my axles? A: While toothpaste can provide some level of polishing, it’s not as effective as dedicated polishing compounds designed for metal. Stick to the recommended polishing compounds for best results.

Q: How long does polishing take? A: The time required varies, but it can range from 30 minutes to an hour, depending on your technique and the condition of the axles.

By following these steps, you'll significantly reduce axle friction and greatly improve your Pinewood Derby car’s chances of winning. Good luck and happy racing!