Pentel Pencil Conversion Tips

Drilling:

It is suggested that a regular 17/64 drill be used to drill as much of the pen blank as possible and use the Step Drill for drilling the last inch or so of the blank.  This will keep the drill bit as sharp as possible for a longer period of time.  The depth collar is preset  for a 4 7/16” blank.  Slight adjustment may be necessary depending on the length of the blank you use.

Blank and Turning:

I use a 4 7/16” blank though a blank up to about 4 ½ “ will work as well.  The end bushings are sized to allow a slight taper at both ends.  I find a diameter in the center of the blank of about .370 or so is about right for my taste.

The conversion mandrel includes a 5/32 inch step.  A blank should be turnned round before drilling and mounting on any of these mandrels to greatly reduce the possibility of damaging the mandrel.