Another revisit on security fastening. - Page 1
Forum section: electronics / repair

author: peteb2
author_rank: Regular Contributor
timestamp: July 08, 2018, 10:13:50 pm
content: Apology to everyone as this subject has been discussed previously but in this case i need to purchase a professional tool (as opposed the adapter pieces sort made from low grade steel that chowderup the minute you use them)...I have two sets of those but it does not include the one i need in this case.I need to access the starter capacitor on my European made household waterpump's motor which is below a plastic cover plate. The plate is attached with an offset style tri-wing head fastener.I don't have much space to work because pulling out the pump and taking it to a workbench makes it a much bigger job so we're attempting the repair insitsu...Appreciate if anyone can ID the kind of head this fastening is known as and whether there's a proper tool please.

author: peteb2
author_rank: Regular Contributor
timestamp: July 08, 2018, 11:25:47 pm
content: I've just found this: (no wonder i am having trouble buying a proper tool). Looks like its going to be a real project to source... because of the security thing."Tri-Wing®Tri-Wing® is a winged security profile consisting of three edges. Thanks to its unusual, three-wing design, it is intended exclusively for use by professionals.This profile is primarily used in household appliances and in the aerospace industry.Licenser is the Phillips Screw Company"

author: helius
author_rank: Super Contributor
timestamp: July 08, 2018, 11:45:08 pm
content: The idea that somebody can patent a fastener design and restrict the drivers to "qualified personnel" is a quaint notion harkening back to the days before globalization.

author: Samogon
author_rank: Frequent Contributor
timestamp: July 09, 2018, 12:42:28 am
content: Wera Kraftform 71 Kraftform Kompakt Security 32 Piece set, Hexagon 1/4"https://www.amazon.com/dp/B0009QX2Q4/ref=cm_sw_r_cp_apip_MOOI2U85vzylO

author: tautech
author_rank: Super Contributor
timestamp: July 09, 2018, 12:49:29 am
content: Quote from: peteb2 on July 08, 2018, 11:25:47 pmAnother place you'll see it in NZ is the little white Telecom point of entry boxes on houses.Reasonably common these days Pete.If you need one in a hurry hook by and borrow mine.

author: Nusa
author_rank: Super Contributor
timestamp: July 09, 2018, 02:09:04 am
content: Cases like this I'd be temped to just remove it with a screw extractor and replace it with a standard screw when it goes back together.

author: clucas
author_rank: Contributor
timestamp: July 09, 2018, 05:26:47 am
content: Quote from: peteb2 on July 08, 2018, 10:13:50 pmLOLit's just another type of torx screw, nothing special, and there are readily available screwdrivers hiding in plain sight.

author: alsetalokin4017
author_rank: Super Contributor
timestamp: July 09, 2018, 06:04:31 am
content: "Security Fastening" is just an excuse to buy more tools. The ones that get me are the ones that are recessed very deeply in close fitting holes so you can't get a replaceable-bit screwdriver to reach them, you have to buy an extralong dedicated screwdriver with the appropriate head on it. Or resort to welding a bit from the replaceable set onto a length of rod stock.Or...https://www.ebay.com/itm/Extra-Long-6-Security-Bit-32pc-Set-Tamper-Proof-Hex-Torx-Star-Pozi-Tri-Wing/111824191857?epid=10011376054&hash=item1a093dc171:g:svgAAOSwqfNXn9rv:sc:USPSPriority!78237!US!-1

author: TERRA Operative
author_rank: Super Contributor
timestamp: July 09, 2018, 07:36:59 am
content: You want a 'Universal screwdriver' like this one:https://www.amazon.com/Damaged-Screw-Extractor-Set-Stripped/dp/B014SH8F3E

author: Stray Electron
author_rank: Super Contributor
timestamp: July 09, 2018, 11:11:59 pm
content: The best thing for security screws is a few left handed drill bits. They'll fit any head type and work fine even in deep holes. LH drill bits will either back the screw out out of the hole or drill it out. Security screws are a joke! You can buy a full set of bits to fit them for about $5 from Harbor Freight.

author: Samogon
author_rank: Frequent Contributor
timestamp: July 09, 2018, 11:23:34 pm
content: Harbor freight is a joke.

author: amyk
author_rank: Super Contributor
timestamp: July 10, 2018, 12:49:34 am
content: I'd use a so-called "universal screwdriver" --- a flat-bladed one with the sides ground slightly to form a wedge shape, which fits thus:

author: martinr33
author_rank: Frequent Contributor
timestamp: July 10, 2018, 03:25:10 am
content: Tri Wing was a mystery 20 years ago, but the low cost security bit sets usually include it. However, the quality can be junk, or OK.

author: ChunkyPastaSauce
author_rank: Unknown
timestamp: July 10, 2018, 07:06:49 am
content: http://pdfpiw.uspto.gov/.piw?PageNum=0&docid=02847894http://www.dtic.mil/dtic/tr/fulltext/u2/a059171.pdf

author: peteb2
author_rank: Regular Contributor
timestamp: July 10, 2018, 07:47:58 am
content: Hi tautech.... yes i do remember the old Telecom white copper-line boxes having the things. At this stage looks like i might be able to use one from Work so thanks for the offer for now.I hate to use a person's tools as i know how i feel when someone helps themselves to mine. The number of times i discover my expensive Lindstroms aren't now doing their usual perfect snip and i have a good look to discover that a self-helper took it upon themselves to access my toolbox & has been cutting "just this little spring" ! The fact they never actually replace the tool should i have been lucky enough to catch the bugger red handed and the massive apology with lots of conveniently forgotten promises makes it all the more awkward....Quote from: tautech on July 09, 2018, 12:49:29 am

author: ChunkyPastaSauce
author_rank: Unknown
timestamp: July 10, 2018, 09:41:57 am
content: http://nz.element14.com/duratool/d00391/bit-set-security-33pc/dp/134114001tw1 thru 4http://nz.element14.com/wiha/284-tw0-tw1/reversible-blade-triwing-0-1/dp/1200648tw0 and tw1

author: peteb2
author_rank: Regular Contributor
timestamp: July 10, 2018, 07:56:03 pm
content: Quote from: ChunkyPastaSauce on July 10, 2018, 09:41:57 amThanks CPS. I have the 'fullhouse' kit from Element 14 (1st link) and the version/series of 'TriWing' drives are not the proper stuff.... They just do not fit end of story!I'll give the next link a shot though just to stock my toolbox.... if anything.

author: tautech
author_rank: Super Contributor
timestamp: July 10, 2018, 08:04:12 pm
content: FYIAnother not too long ago thread on this subject:https://www.eevblog.com/forum/repair/properly-made-tp3-(-tri-lobelobular-)-screwdriver-bits/

author: ChunkyPastaSauce
author_rank: Unknown
timestamp: July 11, 2018, 02:51:23 am
content: Quote from: peteb2 on July 10, 2018, 07:56:03 pmOne of the original design goals of the triwing/torqset (see patent) was to make it so the fastener will reject slightly oversized drivers, to reduce assembly faults damaging the fastener head. If it seem close to the right size yet it doesn't engage, assuming its a standard triwing, it's likely tw-0 (or smaller) (the smallest bit in the 'fullhouse' kit is tw-1)... you can get these down to 000 size (http://eclipsetools.com/products/4-pc-precision-screwdriver-set/), but don't know where in nz.Quote from: tautech on July 10, 2018, 08:04:12 pmfor clarification; tp is for tripoint, the faces are off-center for triwing

author: Stray Electron
author_rank: Super Contributor
timestamp: July 11, 2018, 02:57:16 am
content: Quote from: Samogon on July 09, 2018, 11:23:34 pmFor $5 I can afford to risk it. And FYI I've been using the same set of bits from them for over 10 years. No complaints yet.

author: boffin
author_rank: Unknown
timestamp: July 11, 2018, 03:14:09 am
content: Quote from: Stray Electron on July 11, 2018, 02:57:16 amWe have a similar company here in Canada called Princess Auto, and they too sell a nice handy set of security bits for  under $10https://www.princessauto.com/en/detail/33-pc-security-bit-set/A-p8583023e

author: tautech
author_rank: Super Contributor
timestamp: July 11, 2018, 03:28:11 am
content: Just had a look at a Auckland company I used to get tools from when I was on the tools full time.Tips:http://www.sulco.co.nz/s.nl/sc.16/category.969376/.fThey have some drivers toohttp://www.sulco.co.nz/Tools/TRI-Wing/Maxxpro-Triwing-Screwdriver-Witte.html

author: Raj
author_rank: Frequent Contributor
timestamp: July 11, 2018, 05:11:35 am
content: Should get a die grinder.If you have some spare screws of same type,you can always chuck it up in a vice and just melt and stick an aluminium rod onto it to make a makeshift temporary screwdriver.also try getting a hold of the screwdriver who's photos i've attached.They are pretty much universalalso here's a link to sets that has it all (both notched flat and tri bit)-https://www.ebay.com/itm/100-PC-SCREW-DRIVER-BIT-SECURITY-BITS-SET-TORX-STAR-POZI-PHILLIPS/171967303742?epid=1566224844&hash=item280a0cd03e:g:ubEAAOSw5VFWG2VRhttps://www.ebay.com/itm/Bit-Driver-Security-Screwdriver-33-Piece-Set-Used-For-Tamper-Proof-Screws/221477455568?hash=item339115c6d0:g:IrkAAOSwoQ1TmQygAlso,if the screw is a bit loose,sometimes,sticking a rod with m-seal helps make a makeshift screwdriver