[Cl...] Posted October 23, 2024 Share Posted October 23, 2024 I'm hoping someone here has experience measuring screw threads. I'm using the O-inspect camera to measure the Major/Minor diameters. Pitch/Pitch diameter, lead angle. I just can't find the tolerances for these dimensions. I have the nominals, but don't have the tolerances They are not on the print. My engineer doesn't have them, and I haven't been able to find them online either. Any help would be greatly appreciated. 1/4 - 32 UNEF-2A Link to comment https://qualityforum.zeiss.com/topic/4548-thread-tolerances/ Share on other sites More sharing options...
[Da...] Posted October 23, 2024 Share Posted October 23, 2024 https://torqbolt.com/unef-unified-natio ... ifications I found some information at this site, but it won't let me copy it to share. Hope this helps. Link to comment https://qualityforum.zeiss.com/topic/4548-thread-tolerances/#findComment-13788 Share on other sites More sharing options...
[To...] Posted October 23, 2024 Share Posted October 23, 2024 Please sign in to view this quote. Courtesy Machinery's Handbook Screw Thread Systems Table 4 In the time it took for me to take pictures and upload, Mr. Fitzgerald snuck in for the gold. (in metric....LOL)Screenshot 2024-10-23 131615.jpg Link to comment https://qualityforum.zeiss.com/topic/4548-thread-tolerances/#findComment-13790 Share on other sites More sharing options...
[Cl...] Posted October 23, 2024 Author Share Posted October 23, 2024 Thanks guys! I couldn't find anything like this? Link to comment https://qualityforum.zeiss.com/topic/4548-thread-tolerances/#findComment-13792 Share on other sites More sharing options...
[Je...] Posted October 23, 2024 Share Posted October 23, 2024 You should be able to find nearly all thread standards/tolerances within the Machinerys Handbook. Link to comment https://qualityforum.zeiss.com/topic/4548-thread-tolerances/#findComment-13794 Share on other sites More sharing options...
[Cl...] Posted October 23, 2024 Author Share Posted October 23, 2024 After searching for over an hour I finally found what I needed at Theoreticalmachinist.com. Link to comment https://qualityforum.zeiss.com/topic/4548-thread-tolerances/#findComment-13796 Share on other sites More sharing options...
[To...] Posted October 23, 2024 Share Posted October 23, 2024 Please sign in to view this quote. spelling?Screenshot 2024-10-23 153617.jpg Link to comment https://qualityforum.zeiss.com/topic/4548-thread-tolerances/#findComment-13798 Share on other sites More sharing options...
[Cl...] Posted October 23, 2024 Author Share Posted October 23, 2024 Yep. Typing too fast. Link to comment https://qualityforum.zeiss.com/topic/4548-thread-tolerances/#findComment-13800 Share on other sites More sharing options...
[Wo...] Posted October 23, 2024 Share Posted October 23, 2024 I always use theoretical machinist website for imperial threads http://theoreticalmachinist.com/Threads ... erial.aspx It shows the thread wire size applicable to given pitch, which is nice because I immediately know if I have a stylus size within that range. Edit: Whoops, did not notice you've already found it. Link to comment https://qualityforum.zeiss.com/topic/4548-thread-tolerances/#findComment-13802 Share on other sites More sharing options...
[DW...] Posted October 24, 2024 Share Posted October 24, 2024 I believe thread standards are covered in the ANSI/ASME B1.XX series. PDF downloads are available for all of them with an easy google search. Link to comment https://qualityforum.zeiss.com/topic/4548-thread-tolerances/#findComment-13804 Share on other sites More sharing options...
[Ch...] Posted October 24, 2024 Share Posted October 24, 2024 I thought everyone and their dog used engineersedge.com https://www.engineersedge.com/hardware/ ... sizes1.htm Link to comment https://qualityforum.zeiss.com/topic/4548-thread-tolerances/#findComment-13806 Share on other sites More sharing options...
[To...] Posted October 24, 2024 Share Posted October 24, 2024 Please sign in to view this quote. You could have at least posted the Inch link....LOL Link to comment https://qualityforum.zeiss.com/topic/4548-thread-tolerances/#findComment-13808 Share on other sites More sharing options...
[Ow...] Posted October 25, 2024 Share Posted October 25, 2024 I'll concur, the Machinist Handbook is priceless. However, the PDF copy I have at work (a few years old) is cumbersome, to say the least, to search for anything. Does anybody else have this problem or is there an on-line version that can be accessed with a paid subscription that would be easier? At home, I have the 15th edition book made in 1956, it's 3" thick but, I still use it occasionally. A few other web pages for threads. https://amesweb.info/Screws/metric-thre ... lator.aspx https://www.machiningdoctor.com/threadinfo/?tid=83 Link to comment https://qualityforum.zeiss.com/topic/4548-thread-tolerances/#findComment-13810 Share on other sites More sharing options...
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