The final step of making a pen is the assembly process.
Most people simply press the parts together and leave it at that. I prefer to use a bit of 2 part epoxy to hold the pieces together. All the commercial high end pens are held together this way and we should be no different.
You will find that a pen which has been pressed fitted together, which had a snug fit will eventually over time come apart. When I first started making pen, I didn’t use any glue to hold the parts in. Pens made from all 3 major suppliers did eventually come apart. It’s very good practice to assemble you pen kits this way.
I actually prefer that the pen kits be a bit loose rather than too tight. This is because I know the glue will hold the pieces together. With a tight fit, you run the risk of cracking the pen blank during assembly. With a loose fit and a bit of glue, you have almost zero chance of cracking the blank.
When it comes to assembling the parts, I lay the pieces out on bench with the barrels of the pen in alignment and the pieces in the proper order. I mix a small amount of 2 part epoxy ready for the glue up.
I always start with writing end of the pen. The nib assembly and the end cap goes on first. I use a home made pen press to press the parts together. The home made pen press is made using a piston toggle clamp and a block screwed in on the other end. Once pressed together, I then unscrew the nib assembly and insert the rollerball refill.
Once pressed together I then move onto the cap half. I start with the clip and press that on. Once that has been pressed in, the last piece is the centre band coupler piece. I screw the centre band coupler onto the writing half then align the barrels. When the grains are matched up, I then push the barrel on by hand to get the press started. I then finish the press on the bench vice.
Once this is all done, you have finally completed the pen.