Designer twists and a 3d printed transmission jig

[jschoolcraft]

A bunch of Designer Twist (no tenon variety) pens from PSI wrapped in a bunch of different wood, no idea on most of it. Some really nice chatoyancy on some.

Finishing:

• Sanded 120-600
• Quick wipe with alcohol
• Mylands Cellulose Sanding Sealer
• Doctor's Woodshop Pen's Plus (just one application)
• Renaissance Wax

I have a friend going to a craft fair tomorrow and she offered to put out some of my pens. I prepped and turned all of them over the last few days.

Now, onto the 3d printed transmission jig that made assembly a treat. I used it on every one of those pens and they all came out perfect extension.



This was heavily inspired by others:

• A Quick Tip for Seating Transmissions by Bob Swartzendruber seems to be the source for most of these.
• Mark Dyer demonstrates this in 10 Minutes to Better Pen Making - Assembly.
• Dave (@egnald) made very cool jig described in this thread: https://www.penturners.org/threads/press-perfect-jig.178095/#post-2189931

Mine, and I'll add a reply once I get this uploaded to thingiverse or something, is two sided. One side has a shallow recess to fit over one side of the milescraft pen press and the other side is an 8mm by 13/16 hole to accept the transmission. The instructions for the pen say to leave 13/16" of the transmission exposed.

So, you press the transmission in with the jig, then I flipped the whole assembly around to press in the tip while the transmission was still protected in the jig. Worked great.

Things I might do differently (or suggest someone else to do differently):

• Make the entire diameter bigger so the shallow recess fits both press fittings
• Remove the shallow recess altogether and just let the surfaces meet on the press fittings
• Print it with an embedded magnet and then you might be able to accommodate both a 13/16" depth and swap in a drill rod like Dave has to set the 1 3/4" depth for the other style pens (or make that's 6 of one, 1/2 dozen of the other)