Atlas Center Drilled have new item

Great pic of the pins on the Atlas site, particularly the ss 11 thrd.
in the lower right hand corner. I guess that since we've just about exhausted all the possible thread configurations, we'll be going with left-hand threads now and start all over.
 
KJ Cues said:
Great pic of the pins on the Atlas site, particularly the ss 11 thrd.
in the lower right hand corner. I guess that since we've just about exhausted all the possible thread configurations, we'll be going with left-hand threads now and start all over.
I'll bet not 1 in 100 people would have picked up on that. Good eye! It's actually quite a common mistake that occurs regularly in the tooling trade magazines.
 
KJ Cues said:
I guess that since we've just about exhausted all the possible thread configurations, we'll be going with left-hand threads now and start all over.

I dunno 'bout that. I just bought a really old set of "Bicycle Screw" taps/dies and there are 8 different 5/16" threads (16, 18, 20, 22, 24, 26, 28, and 32tpi) :eek:

Dave, not so silly as to buy used taps, just wanted the box :D
 
DaveK said:
I dunno 'bout that. I just bought a really old set of "Bicycle Screw" taps/dies and there are 8 different 5/16" threads (16, 18, 20, 22, 24, 26, 28, and 32tpi) :eek:

Dave, not so silly as to buy used taps, just wanted the box :D

At one time there was no standard for threads and many companies had their own what seem to be oddball sizes. That was before American engineers got together and made a sort of standard system, United Bolt Thread Coarse UNC and United Bolt Thread Fine UNF.

Dick
 
rhncue said:
At one time there was no standard for threads and many companies had their own what seem to be oddball sizes. That was before American engineers got together and made a sort of standard system, United Bolt Thread Coarse UNC and United Bolt Thread Fine UNF.

Dick


Sir Joseph Whitmore was promoting standard threads in 1841.
The French standardized metric threads in 1898, while the SAE standardized the "Unified" threads 40 years later in 1948.

Of course with a lathe, some gear cutting capabilities, and hand-ground tool bits one can invent their own thread for fun and profit. Thank you Mr. Henry Maudsley.

It is a fascinating bit of industrial age evolution.

Dave, has some BA wrenches, but no old Jag to use them on :(

<edited to change United to Unified, which is correct as pointed out>
 
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Just so you are aware the lower right pin is a 3/8 10 It has a flat bottom that leaves a larger pin diameter and the threads can be cut with a standard tap if you use taps. Chris.
 
Thread sizes

United Bolt Thread Coarse UNC and United Bolt Thread Fine UNF.

Dick[/QUOTE]

Uh: according to my 1960's Machinery's Handbook UNC and UNF stands for
UNIFIED NATIONAL COURSE (or FINE).

Bob Flynn
Denali Pool Cues
 
i buy the 3x8-10F pins from chris hightower for 8$ i think. same pin and i use a standard 3x8-10 tap then a mini boring bar to install

my fav pin and all ive been using
 
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