Talk:Torx

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[edit] Dead Links?

The first two links on the page are dead. Are we to replace them, or omit them? Rny2

[edit] Cam-out

What is cam-out? Mathiastck 21:05, 18 August 2006 (UTC)

Phillips screwdrivers and screw heads have internal mating faces engineered slightly off parallel rather than parallel to the driver shaft as in the case of a competing GKN-Sankey(c) Posidriv design. Cam-out occurs when the force required to turn the screw head further has exceeded that required to force the screwdriver's pressure faces to rise up the corresponding sloping cams of the screw head's internal surfaces and emerge. Variable factors - the hardness of the screwdriver's point and screw head, existing wear in the mating surfaces, lubricant contamination, and the proportional relationship of the downward pressure applied to the torque applied, etc. - mean the point at which cam-out will occur may be considerably lower than in a perfect-case scenario.81.77.2.217 (talk) 17:24, 29 May 2008 (UTC)

[edit] TORX Stripping?

"They are generally disliked by the do-it-yourself community due to being much harder to remove compared to their hex head counterparts, as the torx head/bit are much more prone to being stripped/broken." One of the claimed advantages of the TORX drive system is resistance to stripping/breaking. Is there any proof for this statement? —The preceding unsigned comment was added by 128.61.100.16 (talk • contribs) 04:12, 27 October 2006 (UTC).

I know this is anecdotal evidence as well as original research but pretty much every Jeep owner that I know who modifies their Jeep (lift kits, bumpers, etc.) and I know quite a few, takes the time to replace the torx bolts with hex bolts whenever they need to remove a torx for a modification. Some even go so far as to replace every torx bolt, from front to back, inside and out, with a hex bolt, allen head, or machine screw whenever they buy a new (or used) Jeep. Every one. Just so that they don't have to deal with another torx on that vehicle ever again. Just a few links to prove my point... [1], I've removed almost every last torx bolt from my Jeep, been replacing them with stainless bolts and washers, i myself have ran into that damn torx problem. What works the best is drilling out the torx head, and using vise grips to unscrew the rest of the bolt. Usually, it unscrews very easily. Dismas|(talk) 04:28, 27 October 2006 (UTC)
The statement is specious and should be removed. Thousands of mechanical and manufacturing engineers who've put Torx fasteners into hundreds of industrial and consumer products by the millions over recent decades aren't wrong. Not only the originator of the Torx drive system, but hundreds of manufacturers have proven that Torx drivers last 10 to 20 times longer than competing tools in high volume assembly. Head stripping by do-it-yourselfers can invariably be traced to using damaged tools, using the wrong size Torx bit for the fastener, or attempting to force frozen fasteners. On that basis, NO fastener system could be considered adequate. —QuicksilverT @ 21:59, 20 November 2006 (UTC)
Agree this should be removed, I have read the spec sheats and worked with both hex and Torx fasteners for years in many industries and have striped the head and many, many more hex fasteners then Torx (on a percentage basis). Acctualy it's be a month I'm pulling it and the neutrality warning.Raelx 04:53, 23 November 2006 (UTC)
While I do agree that Torx is typically less prone to stripping than Phillips or internal hex, in my anecdotal experience external hex bolts are less prone to stripping when they are aged (rusty) and require a lot of force to loosen. Hydrargyrum's point about engineers is true, but you have to be careful to distinguish between what works well for initial construction and what works well on a machine subject to years of hard use and corrosion like a vehicle. Also keep in mind that engineers and manufacturers work to save costs and simplify build but don't always take long-term maintenance into account, especially with something like a vehicle where it might be in service for far longer than the expected equipment lifetime. While a Torx drive screw in a computer might be perfect and last the lifetime of the equipment, one on the exhaust system or suspension of a vehicle would rust in both the threads and the drive head, potentially causing a stripped and frozen connector. I wouldn't consider the statement "specious" but would advocate clarification or expansion of the statement, hopefully with some well founded sources.Dculberson 15:25, 2 May 2007 (UTC)

[edit] T0.5, T1.0 notation?

Some Torx screwdrivers are referred to by another notation, T0.5, T0.6, T1.0, etc. Such as these. How does this relate to the T4, T10, T20 etc notation? Caliston 19:26, 27 March 2007 (UTC)

[edit] TTAP

I don't think this deserves mention in this article. It is not a Torx design, just one of several 6-lobe drives unrelated to Torx. —Preceding unsigned comment added by 141.154.40.123 (talk) 02:19, 10 September 2007 (UTC)

[edit] Torx sizes

The Wiha reference for Torx sizes is out of date. There are now T35 and T47 bits, and presumably Torx fasteners that they fit. —Preceding unsigned comment added by 72.72.89.203 (talk) 19:30, 29 December 2007 (UTC)

I wanted to find a table relating torx sizes to screw sizes; eventually I found one on www.torp-fasteners.no/style/documents/torx.pdf. Is this something which should be added to the page? —Preceding unsigned comment added by 213.53.148.66 (talk) 15:03, 21 January 2008 (UTC)

[edit] 5-pointed star Torx Variant?

Apparently some manufacturers are now using a 5-pointed star Torx variant that seems to be distinct from Torx Plus (with smaller cutouts for the points, giving the appearance of a "fatter" star), Security Torx (with the pin in the middle that prevents placing a standard driver in the screw), 5-lobed "Security Torx Plus" (which looks like a 5-lobed combination of the previous two variations), and TTAP (where the screws have a recessed round hole in the middle). These screw have a hole that looks like a plain 5-pointed star and are easy to mistake for a standard TORX screw. I came across these on Toshiba-manufactured iPod hard drives, and found other people griping about them on car parts and consumer electronics hard drive cases. The screws on the hard drive in question are approximately the same size as a standard Torx T4, but the 6-pointed star of a T4 driver head won't. It is possible to turn them with a flat-head screwdriver of approximately the right width but because the fit is not precise, damaging screw and/or driver is likely.

Really a pain; if anyone has authoritative info (like a canonical name for these) it would be welcome. I hate the idea of proprietary fasteners you can't buy tools for!Paul R. Potts (talk) 19:54, 14 February 2008 (UTC)

[edit] Driver control

"Drivers for the tamper-resistant version are tightly controlled by Camcar, and are sold only to OEMs (along with the fasteners), or OEM-authorized repair facilities."

This isnt true, and hasnt been for quite some time. These drivers are widely available at sears, auto parts stores, tool mfgs. like snap-on, etc. Furthermore, you can make your own tamperproof bit by drilling the center of a conventional torx.

http://www.google.com/products?hl=en&q=TAMPER-PROOF+TORX+SET&um=1&ie=UTF-8 —Preceding unsigned comment added by 65.208.85.194 (talk) 19:37, 26 February 2008 (UTC)

[edit] Measure of Torque

Shouldn't the measure in the table be in Nm-1 instead of Nm? —Preceding unsigned comment added by Simonalexander2005 (talk • contribs) 17:26, 29 February 2008 (UTC)

No, because Nm-1 is Newtons per metre, while Nm is Newton-metres. torque = force * distance, so we have Newton-metres. For example, if you apply a force of 20 N to a 250 mm-long spanner, you are applying a torque of 5 Nm (20 * 0.25).

203.122.103.131 (talk) 10:38, 6 March 2008 (UTC)

[edit] Pronounciation

Is torx properly pronounced "torks" so that it rhymes with "forks" or is it pronounced "torrex" or "torr-X"? And while we're on the topic, is the "driv" in pozidriv pronounced as "drive"?

203.122.103.131 (talk) 10:52, 6 March 2008 (UTC)

>Is torx properly pronounced "torks" so that it rhymes with "forks"[?]
Yes, correct.
>is the "driv" in pozidriv pronounced as "drive"?
Yup.
— ¾-10 00:33, 7 March 2008 (UTC)

[edit] Inch vs. Metric=

There are dimensional discrepency's on the Whiha charts between inch and metric. Some large enough to prevent interchange. I currently have equipment that should take T6 per instructions, however a T6 is too small, T8 too large. What's up with that? Per the article, Torx should have only one specification to avoid the inch vs. metric tool hassles. —Preceding unsigned comment added by 64.199.137.42 (talk) 18:52, 22 May 2008 (UTC)