Sharpie refill thread

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Threading

Thanks for the info... i sent a re-fill into tapco usa, they are going to measure it and make me a tap that fits... let me know if you want one, the price gets significantly cheaper the more i order.
 
Pictures

Don't have a picture, but do a search on google, sharpie has made a stainless pen that is goofy lookign becuase it has sharpie written all over it, but the ink is in a threaded refill that threads into the body, so i am going to make my own pen, but i need the thread count so i can tap a lower pen section.
 
johnm said:
Thanks for the info... i sent a re-fill into tapco usa, they are going to measure it and make me a tap that fits... let me know if you want one, the price gets significantly cheaper the more i order.
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John,

I checked it out, like you said.......looks pretty cool. Let me know what you come up with in pricing....I'd probably be interested if the 'Price is Right'.......LOL

THANKS,


Barney
 
Ok

Let me know (Moderator), i don't want to get in trouble for this turning into a group buy kinda thing, it started out just looking for info.... should i move this to the group buy Forum?
 
Pretty sure its not a standard thread. M11 is too small and M12 is too big. I put a caliper on it and the major diameter is about 11.2.
 
Thread

You guys might be right... rather than the endless trial and error, the Tapco people are supposed to call me tomorrow and let me know what it is.
 
Calling

I guess i could... i may have stupided out on that one, but i thought of it, and i figured that they wouldn't give me that information, so i didn't call them.
 
Forget . . .

johnm said:
I guess i could... i may have stupided out on that one, but i thought of it, and i figured that they wouldn't give me that information, so i didn't call them.
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Forget my "Bright" idea . . . I did and Sharpie says that is proprietary information and will not release it . . . .

It was a good try . . .

You were right . . . .they won't share . . .

I think your TAPCO idea was the best . . . please include me in a "tap" buy . . .

Steve
 
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They can be found at Office Depot, etc. I use sharpies everyday, and when I heard about this, I ran out and got one. Gotta say, the SS sharpie is kinda cool. Pics aren't the greatest, but you get the idea.
 

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McMaster Carr carries a variety of taps, including NEF series and others.

http://www.mcmaster.com/#taps

Select the pull down tabs at the top to see the variety of sizes they have.


Here's some more good reading if you're bored:

http://en.wikipedia.org/wiki/Unified_Thread_Standard


I don't have a refill to measure, but if you measure the major diameter and the pitch with calipers, you should be able to see if there is a standard size that's close. Here's some more reading about measuring.....

http://mdmetric.com/tech/tic1e.htm#measproc

http://mdmetric.com/tech/tic1b.htm
 
BigguyZ said:
Interesting. So it's an actual sharpie marker. Cool. Is the cap friction fit onto it?
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Yes. While the stainless steel holder is cool (think "Back to the Future"), I would like to make my own holders for the refills. Time to learn how to make closed end pens.
 
Tap Size

When I measured the major diamter, it was around an M11.2, I don't have an extensive tap and die set, so rather doing the old purchase taps just to try gig, i sent it off, i hope to hear from them today.

John
 
OK - now I have a refill to measure.....


Major diameter = 0.451 - 0.454"

~ 11.45 -11.53mm ---> 11.5 mm ---> not standard, consider using 12mm
7/16 = 0.4375" ---> too small
15/32 = .46875" ---> not standard
1/2" = 0.5" --> loose fit

4 thread pitch ~ 0.154"; 1 thread pitch ~ 0.0385" ~ 1mm ~ 26 TPI

M12x1.0 has a major diameter of ~0.472", and is available at McMaster Carr for $30.

http://www.mcmaster.com/#26015a222/=4adoqu


I'm curious now to see how measurements differ from others - how loose of a tolerance are these? They do appear to be injection molded threads, not cut, so I expect pretty loose fitting.
 
From a drill/tap chart, the 1/2-20 requires a 29/64" (0.4531") pre-drilled hole to tap for a 75% thread, or 15/32" (0.4839") hole for 50% thread. Since the major diameter of the refill I have ranged from 0.451 - 0.454", a 1/2-20 with 0.4531 pre-drilled hole would be too large.
 
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Chuck, What are you going to do with the cap? Could you not use the stainless cap and then have a look similar to whatever pen kit it is that has an all metal cap?
 
Chuckie

Chuckie, i am right along with you, you need to drill a 7/16 hole to get the refilll through... what tap size did you use to get the threads in?
 
jedgerton said:
I know they would be cheap but I wonder if HF would have such a tap?

John
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Yes, they do. Several years ago, I bought a 40 pc. set of metric tap and dies from HF for $9.99. The M12.0 x 1.0 is one of the largest in the set. Although they're cheap, they work quite well and can last a long time if properly cared for.
 
Pen with Sharpie refill

Just a note of caution. Sharpie may have some protection on this pen design and certainly cares about their trademark. The pen you create is not a Sharpie pen, but could be called a pen with Sharpie(R) refill.

While the chances are slim, just trying to prevent the nasty letter from their attorney.

tim
 
I agree with Tim, We have seen this happen in the past when people use the name Mont Blanc etc. It is Mont Blanc Style at best and even better avoid brand names at all.
 
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