"Steven D. Russell" wrote in message ...
Hello Matt,

Pen mills offer an important advantage over using a sanding station to
square the ends of your pen blanks prior to mounting on the mandrel... If
your drilled hole is not straight, centred and true - relative to the
squared pen blank, the pen mill will correct the ends and give you a 90
degree interface for your bushings to mount against.
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Steven,

The idea of the sanding jig is that by using the tube in the drilled
hole over the rod (which is at right angles to the disc) the ends of
the blanks are always square to the hole. The shape of the blank and
an angled hole make no difference.

If you compare the rod to the rod of the pen mill and the sanding disc
to the cutter of the mill you will get the idea.

An additional advantage is that the entire end is flush. This allows
the upper and lower blanks to be turned without a center bushing.

Larry