Today's Casualty

[hari317]

The threads were too tight and this got caught in the section, had a tough time removing it. Pen salvaged, but nib unit gone.

 

 

 

[Pelikan Vera]

as long as the operator is okay that is all that matters. Keep going, as I like your posts. Vera

[hari317]

as long as the operator is okay that is all that matters. Keep going, as I like your posts. Vera

thanks, all is good except some badly callused hands.

[jebib]

_{So I'm not the only one who's done it.}

 

_{Misery loves company, I feel your pain.}

 

_bib

[duncsuss]

Don't throw that feed housing away -- you can use it to test-fit future sections and have no worries about damaging it when you remove it.

 

I've got one that's a little chewed up due to using a screwdriver to remove it. You shouldn't need to ask whether I planned it that way.

[Carl Fisher - F3 Pens]

Been there, done that

[Brooks803]

One of the only things I dislike about Jowo nibs.

[drgoretex]

I have actually taken to making sure the threads are a bit loose to prevent this. That because I have done this more than once before.

 

Ken

[Brooks803]

I just finished a section with this nib and had a bit of a scare. Did my test fit and it was a bit snug and almost had the issue you did. Luckily I didn't and can finish up the rest of the pen tomorrow!

[watch_art]

To prevent ruining feeds/nibs-

 

pull nib and feed

 

shove square file into hole of collar

 

unscrew.

 

the square file will grab the inside of the housing and you can unscrew it pretty easily this way.

[jebib]

BAM!

[manojd]

Hari, was the correct size drill and tap used for the threads? Looks like a jowo #6 unit.

[hari317]

Hari, was the correct size drill and tap used for the threads? Looks like a jowo #6 unit.

The hole was reamed to 7mm and a 7.5x0.5 tap was used. Pls let me know if this is correct. I have now made dozens of sections, this is the first one that got stuck.

Edited May 24, 2014 by hari317

[watch_art]

I use a J drill before tapping. Then 5/16" for the main body of the collar. Then I use a boring bar to clear for the lips of the collar.

Unless something went wonky, this always works.

[hari317]

J is 7.036mm, I ream to 7.0mm

 

5/16 is 7.94, I ream to 8.0mm.

 

Metric is very easily available to me here in India and the housing drawing supplied to me by the nibs distributor uses metric.

 

Only problem for me are the "non standard" threads that the nib housing makers like to use and I don't have the space for a metal lathe.

Edited May 24, 2014 by hari317

[watch_art]

You can get a specialty tap for these units from Mike Redburn.

4th one down

http://www.silverpenparts.com/pb/wp_dfdf98a0/wp_dfdf98a0.html

[hari317]

Thanks Shawn, it is useful information for one looking for the tools. However, I am already his customer and he is an excellent person to deal with

[manojd]

I use 7.4 x .5 tap for the jowo nib unit. This may not be available here, I had to import mine as well from Mike. I also use 7mm drill bit.

[twissy]

I use a 7.4x0.5 Tap.

7mm drill first

7.6mm drill for main body

9mm drill for shoulder.

 

I have ground off the end of my tap so it is flat and tap the full length of the 7mm hole. This gives a bit moe clearance for the unthreaded part to the rear of the threads on the feed holder.

[watch_art]

I drill my sections all the way through with the J bit and have a mark on the tap telling me how deep to thread with the tap. I have ground threads off, but from the middle of the tap. This way they don't create resistance when tapping.