Issue with Cuban pen kit.

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BvIII

Member
Joined
Mar 16, 2026
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7
Location
Maine
I recently purchased two Cuban Pen kits from Rockler. I've been turning pens for about a year, so I know enough to get into trouble, but I'm a long way from being good.

Today I finally got up the nerve to try these kits especially since I have been wanting to try a hybrid blank that I gotten from Brian Sullivan. To my surprise the blanks turned fairly easily and during assembly things went very well. That is, I put the spring on the ink cartridge, both kits have identical appearing springs that have no apparent difference one end or the other. I fed them into the lower tube as directed (Still no problems), finally I put the upper blank on and started to screw it to the coupling (already pressed into the lower end of the upper blank.) Now the problem showed itself. I had already tried the mechanism to insure it turned in and out - it did so with no problem. When I fastened the upper and lower editions of the pen the refill stuck out 16 mm. I took the pen apart and turned the mechanism in and out several times (as it had done previously). I realized that I had put the pen together with it turned all the way out, so I reversed it and put the pen together again. The nib now stuck out approximately 12 mm. An improvement but not what I hoped for.

I checked to see if the top of the ink pen was damaged or missing, if appeared to be intact. I then checked the ink refill was the correct one, it appeared to be in fine shape. The measurement was corect and was the length of similar refills i have. When I swapped the refill with a new one it did exactly the same thing, when swapped with the second kit I had, the results were the same. So being foolish, I put the second kit together and it was exactly the same result.

This is when I remembered (from a long time ago ) being told that the perfect definition of stupidity is "Doing the same thing time after time, expecting a different result). I measured every part of the kit and compared withe the one that I had put together the very first time.

Any ideas on what I can do to fix this?
 

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OK A couple things come to mind. Been awhile since I made that kit. Someone said the short tube is 2-1/8" and long tube is 2-3/8" I can not verify this but you can always check the tube charts in the library. But my point is did you happen to mix the upper and lower barrels up. You would not believe how many people have done this on this site. Second point is I believe those refills have to fit in the tranny aa certain way so you may have to rotate it till it seats properly. That is on a few different kits. Others may have better ideas for you but check these 2 points first.
 
OK A couple things come to mind. Been awhile since I made that kit. Someone said the short tube is 2-1/8" and long tube is 2-3/8" I can not verify this but you can always check the tube charts in the library. But my point is did you happen to mix the upper and lower barrels up. You would not believe how many people have done this on this site. Second point is I believe those refills have to fit in the tranny aa certain way so you may have to rotate it till it seats properly. That is on a few different kits. Others may have better ideas for you but check these 2 points first.
I reversed the tubes this week and I have made over 200 of these pens. It is very easy to do in a split second of inattention.
 
Thanks for the information. Measuring the completed pen looks like i missed the shorter one by about little less than 1/8". That hurts as it was kind of a one-of blank. Well I could try to cut the refill down and keep it in my "Goffed" box for my use.
 
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