This handy little tool
removes the hard 90 degree edge found inside the pen tubes and is
used prior to assembly. Once you are at the point of assembly you
take the pointed end of this tool, insert it into each end of each
pen tube and twist - the cutting edges will bevel the edges of the
tubes. The beveled edge aids in assembly and guides the tip,
transmission, end caps as well as the upper barrel onto the lower
barrel (transmission) without having to worry about galling or
shaving the plating from the parts. I demonstrate how simple this
tool is to use in my video.
The outside of the pen tubes
can also be chamfered. In the event you experience a 'blown'
blank the tube can be salvaged by trimming off the remaining wood
and glue. In most cases a small ridge if brass will be found on
each end of the tube which is a result of the cutting action
caused by your pen mill. Insert the tube into the three-legged
end of the chamfering tool, twist and the ridge is gone.