NPT Internal Threads
#13
Slightly different formula. (DRIVER/DRIVEN) * (DRIVER/DRIVEN) * LS PITCH = PITCH. 25.4/PITCH will give TPI. You'll probably also have to use +/- 5% in your calculations.

The app at littlemachineshop.com should accept a metric lead screw. Also example 4 here: http://www.lathes.co.uk/latheparts/page14.html covers it.
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NPT Internal Threads - by Wongster - 04-28-2017, 07:44 PM
RE: NPT Internal Threads - by TomG - 04-28-2017, 08:15 PM
RE: NPT Internal Threads - by Wongster - 04-28-2017, 09:11 PM
RE: NPT Internal Threads - by Vinny - 04-28-2017, 09:22 PM
RE: NPT Internal Threads - by Wongster - 04-28-2017, 10:11 PM
RE: NPT Internal Threads - by Vinny - 04-28-2017, 10:27 PM
RE: NPT Internal Threads - by Wongster - 04-28-2017, 10:48 PM
RE: NPT Internal Threads - by Vinny - 04-28-2017, 11:06 PM
RE: NPT Internal Threads - by Vinny - 04-28-2017, 11:34 PM
RE: NPT Internal Threads - by Wongster - 04-29-2017, 12:32 AM
RE: NPT Internal Threads - by Vinny - 04-29-2017, 10:36 AM
RE: NPT Internal Threads - by Wongster - 04-30-2017, 04:11 AM
RE: NPT Internal Threads - by Vinny - 04-30-2017, 10:38 AM
RE: NPT Internal Threads - by Dr Stan - 04-30-2017, 07:26 PM
RE: NPT Internal Threads - by Wongster - 05-05-2017, 03:45 AM
RE: NPT Internal Threads - by Mayhem - 05-05-2017, 05:48 AM
RE: NPT Internal Threads - by stevec - 05-05-2017, 06:17 AM
RE: NPT Internal Threads - by Mayhem - 05-05-2017, 08:18 AM
RE: NPT Internal Threads - by Vinny - 05-05-2017, 10:30 AM
RE: NPT Internal Threads - by Wongster - 05-05-2017, 11:00 AM
RE: NPT Internal Threads - by Vinny - 05-05-2017, 11:30 AM
RE: NPT Internal Threads - by Wongster - 05-05-2017, 11:40 AM
RE: NPT Internal Threads - by Wongster - 05-06-2017, 02:04 AM
RE: NPT Internal Threads - by Vinny - 05-06-2017, 10:07 AM
RE: NPT Internal Threads - by Wongster - 05-06-2017, 11:20 AM
RE: NPT Internal Threads - by Mayhem - 05-06-2017, 09:24 PM



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