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Should I Do Something To This Crack In A Pen

repairing crack osmiroid

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2 replies to this topic

#1 scrivelry

scrivelry

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Posted 24 March 2014 - 16:32

I cannot get my pen to take an adequate picture of this, so I will have to describe my problem.

 

I am working on an Osmiroid pen, probably, I think, from the 70's.  It is red, modern plastic, uses the tips which interchange with Esterbrooks, has a black dome ending off the cap and fills with a lever. 

 

The section screws in, and the cap screws on.  Both sets of threads occupy the last quarter inch or so of the barrel.

 

There is a tiny crack in the threads that goes out to the edge, about an eighth of an inch long, and another miniscule crack that is just sitting there within the threaded area, I would never have noticed either except that it is a used pen I am fixing up to give a friend who used to have one like it years ago, and so I was cleaning it and looking carefully at the ink in the threads.

 

My instinct is to leave well enough alone.  I can't glue anything to the back or the front to reinforce it, because there are threads on both sides, .if I try to do solvent welding (I don't know if it even works on injection molded plastic) I am afraid I might deform the threads as it would be my first try, and friend, who is not a FP person, is highly unlikely to take the thing apart and stress it that way. 

 

Do I need, however, to do something because these situations have a known trajectory?  If It were staying with me I wouldn't worry about it, but it is being sent away to live on another continent and I do not want to send a disappointment...

 

T

 

T



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#2 Sasha Royale

Sasha Royale

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Posted 24 March 2014 - 17:38

STOP posting the cap, immediately !   Wedging the barrel into the cap will only extend the crack.  

Be careful not to over-tighten the cap.  A bit of glue might help seal the crack, but it could also 

get into the threads and he "wedging" effect could aggravate the crack.  

 

Before attempting to glue, find out what material the section is.  


Auf freiem Grund mit freiem Volke stehn. 
Zum Augenblicke dürft ich sagen: 
Verweile doch, du bist so schön ! 


#3 scrivelry

scrivelry

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Posted 24 March 2014 - 17:40

STOP posting the cap, immediately !   Wedging the barrel into the cap will only extend the crack.  

Be careful not to over-tighten the cap.  A bit of glue might help seal the crack, but it could also 

get into the threads and he "wedging" effect could aggravate the crack.  

 

Before attempting to glue, find out what material the section is.  

 

 

The crack is in the barrel end, not the cap.  I hadn't posted it to begin with - do you mean stop putting the cap on the pen?

 

As far as I can tell, the section is also injection-molded plastic, but possibly a little harder variety than the barrel.







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