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2 - Nail head shape and outer hub shape?

Discussion in 'General Pinewood Derby Discussion' started by CastleCrasher, Feb 10, 2021.

  1. CastleCrasher

    CastleCrasher Pinewood Ninja

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    Nail head shape and outer hub shape? I usually see people say taper the head. I don't see much of anything said about the outer hub other than removing the step. After removing the step, should it be flat or tapered in to match nail head? If tapered in, how should that be done? 135 degree drill bit? I've seen some that are domed outward on Amazon. Flat or domed outward seems like they would have less contact area friction. Should anything be done to the inner hub? Thanks in advance.
     
  2. T-Bone Racing

    T-Bone Racing District Champion

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    I’ve never tapered a head. If you can remove the step, that’s good, but then I’d just worry about polishing your wheels and axles up.
     
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