Nipple thread.

[beleg2]

I'm restoring an old Tranter revolver.
It have 4 of 5 original nipples but I would like to use new ones.
I can get them at 10 pounds each in England plus shipping but I find that Ruger nipples are almost identical. I can thread Rugers two turns into the Tranter cylinder. The difference is that Rugers have 28 threads and Tranters 30 threads.
Now my question:
If I get correct the tool to correct Rugers nipple threads, is it safe to use those nipples?

Moderator: If this is in the wrong forum, please move it.

Thanks
Martin

[Longknife]

Martin, No I do not believe that would be safe. If you re-threaded them from 30 to 28 tpi I believe this would remove too much material and would leave you with basicaly a stripped out  nipple seat. There would be two different sets of threads in the same hole. Not safe!!! Do not do it my friend!!!!....Ed

[oldiemkr]

NOOOOOOOOOOOOOO Long knife is right!

If the ruger threads are 28 tpi I'd bet the nipples are 1/4" x 28.

 I don't have a metric conversion chart here but you should look first if there is a 30 tpi @ about 6.5 mm dia.

If the Tranter is of UK manufacture and depending on the age it could also be a whitworth thread size.

[beleg2]

Thank you very much both for your helping.!!!!!
As long as I can measure thread is 7/32 x30.
Witworth is 7/32x24.


Thanks
Martin

[Dphariss]

I'm restoring an old Tranter revolver.
It have 4 of 5 original nipples but I would like to use new ones.
I can get them at 10 pounds each in England plus shipping but I find that Ruger nipples are almost identical. I can thread Rugers two turns into the Tranter cylinder. The difference is that Rugers have 28 threads and Tranters 30 threads.
Now my question:
If I get correct the tool to correct Rugers nipple threads, is it safe to use those nipples?

Moderator: If this is in the wrong forum, please move it.

Thanks
Martin

No. Thread integrity will be compromised. Buy the right part.

Dan

[doug]

     Normally I would suggest getting access to a lathe and making new nipples on it.  Only catch is that 30 tpi is one thread that does not occur on most lathes, unless I am mistaken.  Are you sure that the thread is 30 tpi and not 26?  British national fine is 1/4 x 26 and that thread size is pretty common on british percussion shotguns.  Keep in mind that diameters often vary from .240 to about .260 on original guns

cheers Doug

[beleg2]

Thank for all helping.
I will check this again but I have check thread two times 28tpi do not fit, neither 32tpi. Only 30tpi fit but it is very short section .209" so it is difficult to be shure.
Thanks
Martin

[Ky-Flinter]

Martin,

In the box of nipples I looked through for you, I found several that appeared to be 30 tpi on my gauge.  That does not prove your piece uses 30 tpi, just that they do exist.

-Ron