Taps   0.156-64 UNS-2A and 0.094 -80 taps: where to buy? - Page 1
Forum section: electronics / general

author: mr ed
author_rank: Regular Contributor
timestamp: March 16, 2025, 09:08:44 pm
content: Looked all over, google etc and I cant find a source.These are for rf fine tuning brass slugs. Anybody? (I am not a machinist, but into speciality electronics).

author: Poroit
author_rank: Frequent Contributor
timestamp: March 17, 2025, 09:33:18 am
content: G'day mr ed,Do you have a chart that gives all the specs?I assume it is 5/32" with 64 teeth.

author: coppercone2
author_rank: Super Contributor
timestamp: March 17, 2025, 11:55:51 pm
content: I got strange taps from china. Electro-cleaning brush manufacturers like these to 'key' their over priced wands.Always consider getting it made, they are fairly affordable. What is nice for you is1) you don't need it super robust (RF things are soft), so low quality china heat treat and lack of coatings might be more then OK. Just don't use it on stainless. Or if someone just makes it on the latheAnd if you go DIY, you can use softer taps and make it a 'serial tap', so you move less material with say 2+ taps. Then you don't really need the super strength of a proper tap.. you are paying for operating speed (one operation), # of holes, and also hard material capability. If you lose these features suddenly it becomes a much more easy to make tool.

author: alpher
author_rank: Frequent Contributor
timestamp: March 18, 2025, 12:38:41 am
content: 0.094 -80 it's a standard 0-80 tap, can be bought almost anywhere on amazon for sure.0.156-64 UNS doesn't sound right, are you sure it isnt some metric thread?

author: Smokey
author_rank: Super Contributor
timestamp: March 18, 2025, 06:54:45 am
content: https://www.mcmaster.com/products/taps/

author: mr ed
author_rank: Regular Contributor
timestamp: March 18, 2025, 12:45:23 pm
content: 0-80 is a 0.094-80, that's solved, thanks.0.156 is what's given, see attached screenshot.

author: mr ed
author_rank: Regular Contributor
timestamp: March 18, 2025, 12:51:15 pm
content: 5/32 is 0.156...

author: alpher
author_rank: Frequent Contributor
timestamp: March 18, 2025, 03:05:39 pm
content: It could be a misprint, why don't you buy a couple of them then measure?

author: alpher
author_rank: Frequent Contributor
timestamp: March 18, 2025, 03:07:32 pm
content: On the second hand:https://www.ebay.ca/itm/256189486912?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=-vkz4fqVTIy&sssrc=2047675&ssuid=ZDWzfPiQSXW&widget_ver=artemis&media=COPY

author: mzzj
author_rank: Super Contributor
timestamp: March 18, 2025, 04:22:03 pm
content: .156 is really close to M4x0.4Not really any easier to find tho

author: factory
author_rank: Super Contributor
timestamp: March 18, 2025, 05:17:14 pm
content: Quote from: alpher on March 18, 2025, 12:38:41 amThere seems to be something different for the UNS, 0.094" is the outside diameter, whichcan'tbe #0-80 UNF as that is 0.06" i.e. too small.Datasheets for the parts in question;https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/4898/L6995-9.pdfhttps://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/4898/L6996-1.pdfDavid

author: mendip_discovery
author_rank: Super Contributor
timestamp: March 18, 2025, 07:56:58 pm
content: UNS = Unified SpecialUNF = FineUNC = CouseUNEF = Extra FineThey are special threads. Other than going direct or getting someone to make it your a little stuck.I just looked through, BA, and Whit and then foundBSCY = British Standard Cycle thread.5/32 x 32 BSCYIt is only half the Threads Per Inch but it's the right diameter.

author: mr ed
author_rank: Regular Contributor
timestamp: March 18, 2025, 09:25:37 pm
content: The tuner slug is slightly springy along the long axial axis which provides a constant turning friction for a stable set and forget feature - to provide tuning accuracy. The movements are well under 200um. I've tried a standard M3 screw and that was horrible. You get backlash and other problems. I figure that the 0-80 tap would be a good enough fit for the .0.094 -80 It's brass in brass and I tap by hand with oil. Good enough?

author: TimFox
author_rank: Super Contributor
timestamp: March 18, 2025, 09:33:05 pm
content: Another vendor of tuning elements with UNS screw threads:https://www.digikey.com/htmldatasheets/production/2846713/0/0/1/microwave-tuning-elements.html

author: factory
author_rank: Super Contributor
timestamp: March 18, 2025, 09:36:15 pm
content: Quote from: mr ed on March 18, 2025, 09:25:37 pmNo it's going to be useless, the tapping drill specified for the tuner slug is 0.082" diameter, the outside diameter of the 0-80 UNF tap is 0.060", it will be too small and will cut nothing.David

author: Andy Watson
author_rank: Super Contributor
timestamp: March 18, 2025, 10:14:30 pm
content: Tracy tools claim to have 5/32 x 64 taps - not cheap though! And then there's postage.https://www.tracytools.com/product/5-32-x-64-tpi-uns/

author: thm_w
author_rank: Super Contributor
timestamp: March 18, 2025, 11:42:26 pm
content: I would be tempted to figure out how to tap M2/M3 or equivalent with a tight tolerance instead.https://www.emuge-franken-group.com/us/en/threading-technology/machine-tap/c/fg01?c=FG01&q=:relevance:feature-HYBCL_PRODUKTMERKMALE-ABM_GS:ABM_GS_LK-UNC&page=0?q=%253Arelevance%253Afeature-HYBCL_PRODUKTMERKMALE-ABM_GS%253AABM_GS_LK-UNC%253AallCategories%253AFG01%253AklammerProduct%253AfalseBut thats frugality speaking, and may be just as hard to do.If its a machined product the threads can be cnc thread milled though.

author: mr ed
author_rank: Regular Contributor
timestamp: March 19, 2025, 03:01:14 am
content: I know there at least 3 makers, Johnson, Sprague, someone in France, I think one in England too.I emailed Johnson, wanted their taps last week, no response yet. Nobody wants to bother with small orders of 2-3 of anything it seems.