I am looking for information on the thread size, and pitch for the Pelikan nibs. If there is a place for collective results on all the models that would be sweet. For now thought I am trying to put the M200 nib into another host, and that will require some retapping of the barrel. Any have this info, or know where I might find it?
Thanks
Chuck

I have figured out that this is a 7.11mm X 0.7mm 60 degree thread. Would anyone know where to fid a tap this size?

Wizergig, I think it's pitched @ .75 and the 7.11 would be 9/32. .75 in metric = 32 TPI so a 9/32 32 TPI would get you there. About the same size of the Sheaffer's TD "renew" points (wich fits inside the Pel threads)

Ohh. Be very, Very, Very careful.
Wizergig, make sure that you are CERTAIN about the thread. I'd suggest that you beg/borrow/buy[last resort only!] both metric & imperial screw gauges to check the pitch. Then regardless of what thread it seems to be nearly, make your own tap on a lathe with an exact copy of the thread you actually find. Make the tap from silver steel & heat treat if it's going into metal, else make out of steel as a one off and don't bother with any hardening.
The threads on pens seem, in my limited experience, to be made up by the manufacturer to suit their pen design rather than conform to any nationally recognised standard - so suggesting that it's 'something near to 9/32 x 32 tpi' is a little dangerous. jicaino could well be correct, but if it were my pen I'd want to be 100% certain that I had ruled out the possibility of an odd thread first.

Regards

Richard.

I'm not "guessing". I'm certain! Check any gearing for domestic vs metric pitches on your lathe's manuals and you'll see that regardless of the main leadscrew being metric or domestic, the gearing for .75 and 32 TPI is the same (so is the same for other pitches) this can be easily checked out with a pitch gauge (I have done so)

In fact, the 9/32 is off line too, that would be a UNF size. Of course that the nomenclature is correct for 9/32 but at a toolshop this would be called a number then UNF. (Don't know if I'm explaining myself coherently here, I know you richard is a machinist so I'm sure you understand what I'm talking about)

If I can find a 9/32-32 tap I am willing to give it a try. I am certain that my thread pitch gauge measures it a .7 though. .75 does not quite fit.

you can always tap in another piece of scrap material and double check. I'm going to get back to you with the UNF nomenclature for the 9/32 x 32 TPI pitch. There's a lot of online stores at ebay that sells very good tools for specific uses such as aerospacial, etc that have odd balls. Or you can just go to rosenthal jewelry supplies international (rjsintl.com) and check them out. Great tooling source. Band instruments repair online stores would have this "odd" measure too. votaw.com most likely have that. I'd recommend feree's too but A) they don't take online orders (yes, probably not a big issue up there) they have a huge stock on everything so browsing thru their stuff and recalling the codes and everything is kind of dizzying.

A thread pitch of 0.75mm and of 32 tpi are not the same, as simple arithmetic will prove. 0.75mm is 33.866... tpi (25.4/0.75).

--Daniel

I keep coming back to this post (some sort of curious fascination I suppose) and tried to think of something intelligent to say, but haven't got a clue what you lot are talking about, all too technical for me.

Still has been interesting to read (even if it went above my head), Wizergig please let us know how you get on, hopefully you won't ruin the pen you are experimenting with.

Allright I had to go back and double check (now that I am actually confused). It is absolutely a .7 thread not a .75 (yes I changed the previous thread) A .75 will not work. I am not sure how to convert that, but it could well be a special thread size just for Pelikan. Actually it is not the pen I am worried about. I have a couple of extra Pelikan nibs that I want to put into some knock around piston fillers.

and here's the reason why I haven't been getting any success with my jet 9x20 lathe! all the domestic pitches are WRONG! (originally equipped with a metric leadscrew)

so the way to go will be following richard's advice and fab a custom tap.

Well thanks for all the help guys. Now I know, but that doesn't leave me anywhere to go with this. I have no way to make a tap of that thread.

Wizergig,

I need to check on my lathe, but I think I've got gearing to do 0.7mm pitch. I'll check tonight.
If you PM me with your address I'll see if I can make an unhardened steel tap for you. If you wish to case harden it, then that'll be up to you. I'm on holiday to Canada towards the middle of August & could post it to you when I get to Calgary or sometime shortly after that.
Could you let me know the exact outer diameter (with a micrometer) and how long the threaded section needs to be. Also how deep the tapped hole needs to be. I'll do you a tap with one flute, as close to 0.02mm oversize as I can get with a 0.05mm flat on the top of the thread, and a 3 thread lead-in (unless it'll be going into a through hole where a much gentler lead-in - say 10 threads - would be better). Right hand thread - let me know if it's a left hand thread. I suppose it'll take around an hour to do the thread and another half to slit the cutter to make the cutting edge. No problems.
[Thoughts - I should be able to get away from domestic chores for that long. I hope.]
By the way, do you have a tap wrench? If not I'll make the tap from hex bar so you can use a 10 or 13mm spanner/ socket with tommy bar. To be honest, I'd prefer to make it from hex bar as I've got more gash hex bar lying around than I've got rounds.

Regards

Richard.

Yep it does 0.7mm pitch.

Regards

Richard.