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How to use the Bore Polisher on Your Pinewood Derby Car
Wheel Bore Polisher
It is critical that the wheel bore be as smooth as possible. This is the area of the wheel that comes in contact with the axle so the smoother it is, the faster your car will go.
The Pro Hub Polisher includes a special micro polish designed for plastics. A small amount of polish is applied to a small section of the supplied pipe cleaner then is spun in a drill to polish the inner hub.
Molding imperfections are also removed and break-in time of a new set of wheels is reduced.
Preparation
Clamp a hand drill to a work surface. Do not use a Dremel-type tool as the RPM is too high.
Insert the solid shaft of the Pro-Bore Polisher into the chuck of the drill.
Cut a piece of pipe cleaner 1-1/4” long.
Slide the pipe cleaner between the two prongs of the tool.
Make sure that the pipe cleaner is centered between the prongs.
Caution - A small amount of polish may be thrown when the drill is running so wear eye protection and old clothes Cover any sensitive equipment near the work area.
Polishing
Apply a small amount of polish to the area of the pipe cleaner held by the tool - the area between the two red arrows as shown above.
Important - Do not slide the wheel onto the Bore Polisher while the drill is running.
Slide a wheel onto the pipe cleaner and over the tool. Hold the wheel and start the drill on a slow to medium speed. Move the wheel back and forth on the tool for 5 to 10 seconds. Keep the wheel on the polished area of the pipe cleaner.
Slide the wheel to the unpolished area of the pipe cleaner and spin for
an additional 5 seconds. Remove the wheel and stop the drill.
Repeat steps 5 to 10 for the other wheels.
Clean-Up
- Wash the wheels in water using a clean pipe cleaner to scrub inside the bore.
- Dry the wheels. A dry portion of pipe cleaner can be used to dry inside the wheel bore