#CSCBARR52
PSI Woodworking Products
© 2019 PSI Woodworking Philadelphia PA 19115 - v1/19
5
Installing the Woodworm Screw
The screw chuck (F) mounts directly into the bottom of the #2 round jaws (D). To safely secure
the screw chuck to the jaws, insert the base of the screw chuck so the tenon end of the jaws fi t
securely into the recess/groove in the screw chuck (see photo below). Use the key tightening
wrench (C) to tighten the jaws onto the screw chuck. Wiggle the screw against the jaws to
ensure it is fi rmly seated. For mounting the wood, drill a 3/8” hole.Spin the blank over the screw
chuck to thread it fi rmly in place.
Woodworm Screw
#2 jaws
Blank
Drill Chuck Mounted to tailstock
(not included)
Using the Pen Blank Drilling Jaws
Drill Bit
Jaws
• Install the jaws into the chuck. Open the jaws using the key tightening wrench included with the
chuck.
• Insert your blanks as far as possible towards the back of the chuck using the grooves in the
chuck to grasp the corners
of your blanks. (optional: place a small piece of wood behing your blank to avoid “tearout” while
drilling.
• Tighten the jaws around your blank. Note: Jaws will self center non-square pen blanks
• Install a drill chuck into the tailstock of your lathe, install the drill bit with the appropriate diame-
ter for drilling the blank.
• Re-wind the tailstock quill as far back as possible (without ejecting the drill chuck).
• Advance the tailstock assembly so the drill bit almost touches the blank.
• Turn on your lathe to its slowest speed (or about 600RPM).
• Advance your bit into the blank using the quill handwheel.
• Advance until completely through the blank (note: the chuck is hollow behind the jaws to allow
the bit to advance well beyond the end of the blank.
• Back out the bit during drilling as necessary to clear the hole of debris.
• If you have a variable speed lathe, adjust the speed for optimum drilling speed.