How to drill axle holes
in your Pinewood Derby car
Pro Body Jig
The Pro Body Jig is an adjustable tool designed to accurately create
new axle holes and a lower center of gravity by using a hand drill
on BSA and Pine-Car Kits. The required #44 drill bit is included.
This tool is not recommended for use with slots.
Instructions
1. Test fit the tool on the bottom of the block with the four
"ears" positioned on the sides of the block. If the tool will not
fit into the block, use coarse grit sandpaper to reduce the width
of the block until the tool fits snuggly. If the tool is
loose, the fit can be tightened by placing a piece of paper, folded
as needed, between the left or right ears of the jig and the block.
2. Measure and mark the desired position of the new axle holes
on one side of the block. Extend the mark from the bottom
of the block to the top of the block using a square (or measure
and mark near the bottom of the block and near the top of the block,
and then join the line with a pencil and ruler). Holes for extended
wheelbases are typically positioned 5/8" from the end of the block.
3. Adjust the Pro Body Jig so that the marks on the drill guides
line up with the marks on the block. A 3/32 inch hex key
is used for making adjustments. Clamp the jig in place with
two clamps, one on each of the drilling guides.
4. Hold the block firmly, position the drill bit in the hole,
and slowly drill 3/4" into the block.. Drill the remaining holes
without releasing the clamps. If a raised whole is desired, drill
only one of the front boles (either side) and proceed to step 5.
5.Transfer the line on the side of the block to the bottom of
the block.
6. Position the tool on the side of the block that you want
to drill the raised hole and align the index mark on one of the
drilling guides with the line on the bottom of the block. Make
sure that the third hole on the guide is positioned near the bottom
of the block. Clamp
the tool in place.
product catalog
