Barrel Thread

[maxgroebel]

Silly question. I've got an old 121 which has done faithful service. Now, the thread has become worn after 30-40 years of unscrewing and screwing the barrel, so the barrel often unscrews itself. Anything one can do about it?

[piscov]

Are you sure it's a 121? I believe the 121 is a slip on cap.

[fountainbel]

Silly question. I've got an old 121 which has done faithful service. Now, the thread has become worn after 30-40 years of unscrewing and screwing the barrel, so the barrel often unscrews itself. Anything one can do about it

Which threads look most worn, the male barrel threads of the female cap threads?

Expanding the barrel threads or shrinking the cap threads could help.

I've already restored the thread fit by expanding the barrel threads and refreshening of the threads the lathe.

Francis

[maxgroebel]

Vasco,

Reasonably sure. It has been identified as an 121 in an earlier thread. At least some version. I'm talking of the thread connecting the barrel to the section, not the cap.

 

Fountainbel,

Thanks for the tip. But I have no idea how to do that. It's a plastic thread.

[hari317]

I would use a tiny dot of rosin based section sealant on the section barrel threads. The section can be easily opened for refilling and the pen wont self unscrew.

[piscov]

I thought you were referring to a cap/barrel thread. That is why I asked if it was indeed a 121.

Hari317 suggestion may be easier for you as you do not have a lathe, but Francis suggestion is more definitive.

 

You can make Rosin very easily. You will only need Turpentine and linseed oil. I have some I prepared myself. If you need, just let me know.

 

Another option is to find that part. I believe that pen uses an inner barrel that has those threads.

[maxgroebel]

Thank a lot, everybody. I will try this.