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Arbor Preparation
Parts
5 - 3 3/4" dowels
1 - 1 ½" dowel
1 - Arbor sizing jig (#56)
Procedure
Label one end of each of the 3 3/4" dowels with the numbers 1 through 5. The labeled ends will be the
left ends of the arbors as shown in the diagram below.
Use 100 grit sandpaper to sand each of the above arbors until the entire dowel is able to slip easily
through the hole in the arbor sizing jig (#56). Sanding is best accomplished by wrapping a strip of
sandpaper around the dowel and then sliding and rotating the dowel in the sandpaper.
After the dowels are able to slip easily through the arbor sizing jig (#56), use a succession of 150, 220,
400, and 600 grit sandings to smooth and polish the sections of the 3 3/4" and the 1 ½" arbors that are
shown shaded black in the diagrams below. Apply graphite to the shaded regions of the 3 3/4" and the
1 ½" arbors by coloring that section of the arbor with a pencil. Install pulley wheels (assembled
previously) on arbor #4 and #5, and set washers (#34) on arbor #2, #4, and #5 in the locations shown
on the diagram below. The set washers should fit tightly; do not glue them yet in case their positions
need to be adjusted. (If the set washers are too tight, insert the blade of a slender slot screwdriver to
expand the washer slightly; if too loose, add a film of glue to the arbor to build it up.) Be sure the
pulley wheels can spin freely on arbors #4 and #5.