Bullet and Shell Civil War Projectiles Forum
Relic Discussion => Artillery => Topic started by: callicles on July 11, 2013, 02:01:47 AM
-
Kinda silent here; thought I'd post a question. I normally bug Pete with a million questions; so I thought I'd give him a break and ask it here:
On a Shenkl percussion fuze (brass, Pat. D. 1861) you find 9 or 10 threads. They are obvious, big, and easy to see. But, below the big threads, down the "shaft" which looks to be a smooth brass surface, there appears to be very fine, hair-line threads. I have seen the same thing on some Hotchkiss fuzes. Can anyone tell me what the use was for such a finely threaded shaft? They seem so miniscule, and so finely cut as to serve no purpose. However, I know that can't be the case.
Thoughts appreciated.
Thanks
-
They serve no purpose. More than likely caused by the thread die or the lathe tool if cut on a lathe. I am not certain as to how the body threads are cut - die or lathe tool.
Regards,
John
-
I have to agree with John on this.
-
Absolutely. In this time mass production would have been done on a lathe. The marks a the run out after reaching the end of the casting where the threads are supposed to be. The single-edged cutter travels an a geared setting. They serve no purpose, just a tool mark blemish.
-
Thanks to all who responded. I learn something every day!!