thread dimensions
thread dimensions
(OP)
i like to define a custom thread. 1,625 major diameter, and 56 pitch.
mil-s-8879 says the pitch diameter tolerance per ASTM B1-1. i could not find it in B1-1.
help me to find all the diameters/tolerance, major, pitch, minor, male and female.
thanks.
mil-s-8879 says the pitch diameter tolerance per ASTM B1-1. i could not find it in B1-1.
help me to find all the diameters/tolerance, major, pitch, minor, male and female.
thanks.





RE: thread dimensions
If you specify 1-5/8-56UN, you can look up your tolerances in the Machinery's Handbook. This all assumes of course that I correctly guessed your units.
--
JHG
RE: thread dimensions
but the machinery handbook only lists up to 24 pitch, no finer.
if go by ASTM B1-1, table 19, for 1.625, LE, say .125, 56 pitch, the pitch diameter tolerance would be 0.001764 + 0.000530 + 0.001025 = 0.003319 for 2A, and 75% of it, .002489 for 3A.
right?
RE: thread dimensions
You are looking at the table for Standard Series and Selected Combinations. I have the 26th edition here. The page immediately before this is called American Standard Unified Inch Screw Thread Form Data. This shows the thread form independent of the major diameter.
--
JHG
RE: thread dimensions
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: thread dimensions
http://quicksearch.dla.mil/qsDocDetails.aspx?ident...
RE: thread dimensions
search the treads, one of them "How Do I Specify Unified Thread Form Custom Threads? by KENAT", but B1-1 table 31 thru 40, are for "coarser" thread than what i like to use due to the thin wall.
so, i think i still would go by B1-1, para 5.8 "...... apply to standard and SPECIAL series screw thread." and calculate per para 5.8.1 and 5.8.2 along with table 19 for 1.625-56UNS-2A, 2B.
thanks.
RE: thread dimensions
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: thread dimensions
is my saying posted at 12 Sept 16 13:03, wrong on tol cal ?
thanks a lot.
RE: thread dimensions
Machineries handbook or similar reference may have the tolerance calcs, else yes you'll need ASME B1.1.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: thread dimensions
thanks to KENAT for helping me.
RE: thread dimensions
http://www.boltplanet.com/Un/un.asp?selectsize=&am...
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: thread dimensions
it is weird. my clicking did nothing (Google Chrome). one interesting thing, "your" page, engagement length on top, my page nut factor on top.
i still will go over B1-1, calculate those and compare to "your" page.
thanks.
RE: thread dimensions
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: thread dimensions
my google chrome was set as pop up not allowed. your suspicion was right.
thanks.
RE: thread dimensions