Parker Duofold Deluxe - Cap Not Screwing On

[Greenie]

With the pen fully assembled, the threads do not engage? Do they catch at all and just skip? If you take the naked barrel and the cap without the inner cap, does it still not catch? Is it going in, but not catching, or does it not go in far enough?

 

If everything else is ruled out with all the troubleshooting above outstanding input...

 

You can make a tiny adjustment using a band clamp and gentle heat to tighten the cap threads just a tiny bit.

You can buy it on pentooling.com

or it is a one of these

http://www.ebay.com/itm/New-Dental-Instrument-Universal-Tofflemire-Matrix-Retainer-Bid-/271819654851?pt=LH_DefaultDomain_0&hash=item3f49b6c6c3

(sorry pentooling for giving out your secret), and you also need to buy the matrix band material. I have a big roll of plain straight stuff - works fine.

 

Then put clamp over the cap at the level of the threads, place over PROPER heat, and tighten up just a tiny bit. Check progress. When it fits, stop, and let it cool a while. You risk leaving signs of the technique on the cap, but you can polish this out afterwards.

 

AGAIN - only if you are sure that there is a thread size mismatch,and not an issue with the nib too far out or an incorrect section that is too wide for the cap.

[kirchh]

With the pen fully assembled, the threads do not engage? Do they catch at all and just skip? If you take the naked barrel and the cap without the inner cap, does it still not catch? Is it going in, but not catching, or does it not go in far enough?

 

If everything else is ruled out with all the troubleshooting above outstanding input...

 

You can make a tiny adjustment using a band clamp and gentle heat to tighten the cap threads just a tiny bit.

You can buy it on pentooling.com

or it is a one of these

http://www.ebay.com/itm/New-Dental-Instrument-Universal-Tofflemire-Matrix-Retainer-Bid-/271819654851?pt=LH_DefaultDomain_0&hash=item3f49b6c6c3

(sorry pentooling for giving out your secret), and you also need to buy the matrix band material. I have a big roll of plain straight stuff - works fine.

 

Then put clamp over the cap at the level of the threads, place over PROPER heat, and tighten up just a tiny bit. Check progress. When it fits, stop, and let it cool a while. You risk leaving signs of the technique on the cap, but you can polish this out afterwards.

 

AGAIN - only if you are sure that there is a thread size mismatch,and not an issue with the nib too far out or an incorrect section that is too wide for the cap.

 

You might want to review the thread for the answers to some of these questions.

 

I don't recommend the technique outlined in this post. In the general case where threads skip due to shrinkage or the barrel threads, it is far better to expand the barrel threads than to contract the cap in the area of the threads.

 

--Daniel

[Greenie]

Frankly, there was so much back and forth with the questions that I lost track of the details of the situation. I am also in the habit of confirming important information before acting on it.

 

Daniel - How do you expand the barrel threads? Never really occurred to me that I could do it from that side. I always like to learn new techniques - Never know when they will come in handy.