Drilling Axle Holes With Precision

To achieve excellent wheel alignment, an important factor in building a competitive pinewood derby car, using accurately drilled axle holes (instead of slots) is the method of choice.

This article explores techniques, bit size, and tools available to help you achieve excellent pinewood derby wheel alignment. Before drilling axle holes check your local rules to make sure they are allowed.Drill

Bits

KitAxle SizeBit
BSA0.086 to 0.087#44 – 0.086
PineCar0.088#43 – 0.089
Awana0.0923/32 – 0.938

 

Hand Drill/Pin Vise

Figure 1 – Pro-Body Tool

Drill Press


Figure 2 – Inaccurate holes due to out of square blocks
 


Figure 3 – Vertical fence creates accurate holes regardless of block shape

Read the complete article in Pinewood Derby Times Volume 12, Issue 9.
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