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12 Steps to Make a Perfect PKM-1 Pen
Strongink- Daniel / 2019-07-20


Some customers send feedback to Strongink that they cannot understand the instruction for the PKM-1 pen clearly,


This article is a new version instruction with pictures to guide you finish a perfect PKM-1 series pen step by step.

PKM-1 pen is twist type ball point pen designed by Strongink. When you unpack the poly bag for the kit, you will see 10 parts as below photo.

1x Pen top cap

1x pen clip

1x Band

1x Twist mechanism

1x Coupler

1xpen tip

2xpen tubes

1x Parker type pen refill.

1x Spring

Before we start the pen making, we need this clear that the longer tube is for lower barrel

All right , now we start pen making.

Step 1.

Sanding brass tubes,

Sanding the two brass tubes with 240 grit sanding paper evenly on the surface, which will let you glue the pen tubes strong enough from coming unglued from the pen blanks, when you process them in the fowling steps.


Step 2.

Preparing the pen blank

Select a pen blank to match the finish of the pen kit, size from 5/8" or larger square stock, mark the 2 blank to the length of the tube and add 1/16each end for squaring off.

Please note: the shorter brass tube is for upper barrel; the longer brass tube is for lower barrel.


Step 3.

Cut pen blanks

Cut the pen blanks along the line with band saw, bench saw etc.…  whatever cutting tool as long as you can cut it into two along the line.


Step 4.

Drilling the two blanks

Mark the center and Drill 8mm holes lengthwise through the blanks


Step 5

Glue the pen tubes

Spread glue over the tubes, insert the blanks with a twisting motion to spread the glue evenly inside and center the tubes lengthwise inside the blanks


Step 6.

Squaring and trimming the blanks

When the glue is dry, square the ends of the blanks. Use a 8mm barrel trimmer. Take the excess material down flush with the ends of the brass tube. (do not trim beyond

the length of the lower tube since this may interfere with operation of the mechanism and assemble)


Step 7. (Optional)

Chamfering the brass tube

Chamfer the four ends of the brass tube, clean all the burrs caused by last step, this step is optional, if no burrs on the ends.


Step 8.

Turning the blanks

Mount the cap bushing, upper barrel blank(shorter one)and center bushing on the mandrel as indicated in Diagram B.


NOTE: The center bushing has two shouldered diameters made to match the wide and narrow bushings. The second blank should be mounted next to the center bushing, and the third (narrow) bushing mounted last

(See Diagram B).

Step 9.

Turning the Tenon.

The diameter of the tenon should match the narrow diameter of the center bushing. To ease the turning of the tenon, slide the center bushing off the mandrel and turn it around 180 degrees. Next, slide the center band onto the bushing (flat end towards the wood) and replace it on the mandrel as indicated in Diagram B.

The length of the tenon can be approximately 1/4" which is about 5/32” less than the width of the center band.




Step 10.

Polishing the blanks

Polish the two pen blanks with sanding paper with 240 grit, 320 grit, 600 grit, 800 grit 1000 grit,1500 grit,2000 grit,2500, 5000 grit.

If you are polishing stone or acrylic pen blanks, polishing with wet sanding paper will let you get perfect result.



Step 11

Glue the band,

Spread some glue on the tenon, and insert the band, please note the direction of the band



Step 12

Assembling the pen

please assemble the pen as below photos show.