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Encyclopedia > Torx
Part of the series on
Screw drive types
Slotted ("Flathead")
Phillips
Pozidriv
Torx
Hex
Robertson
Tri-Wing
Torq-Set
Spanner Head
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TORX, developed by Camcar LLC of Acument Global Technologies (formerly Camcar Textron), is the trademark for a type of screw head characterized by a 6-point star-shaped pattern (in the same way that slotted heads, Phillips, Hex, and Robertson have flat, ×-shaped, hexagonal, and square tips, respectively). People unfamiliar with the trademark generally use the term star, as in "star screwdriver" or "star bits". The generic name is hexalobular internal driving feature and is standardised by the International Organization for Standardization as ISO 10664. Screws come in a variety of shapes and sizes for different purposes. ... Image File history File links This is a lossless scalable vector image. ... Image File history File links This is a lossless scalable vector image. ... Henry F. Phillips (1890 - 1958) was a businessman from Portland, Oregon and inventor of the Phillips-head screw and screwdriver. ... Image File history File links This is a lossless scalable vector image. ... The Pozidriv screw type is patented, similar to cross-head but designed not to slip, or cam out. ... Image File history File links This is a lossless scalable vector image. ... Image File history File links This is a lossless scalable vector image. ... Hex keys of various sizes. ... Image File history File links This is a lossless scalable vector image. ... Robertson screwdrivers A Robertson screwdriver is a type of screwdriver with a square-shaped tip with a slight taper (in the same way that flatheads, Phillips, Allen, and Torx have flat, ×-shaped, hexagonal, and hexagrammal tips, respectively). ... Image File history File links This is a lossless scalable vector image. ... The Tri-Wing is a type of screw and screw head. ... Image File history File links This is a lossless scalable vector image. ... Image File history File links This is a lossless scalable vector image. ... Screws come in a variety of shapes and sizes for different purposes. ... Phillips Head refers to the shape of the head of the screw as a plus sign. ... Hex keys of various sizes. ... Robertson screwdrivers A Robertson screwdriver is a type of screwdriver with a square-shaped tip with a slight taper (in the same way that flatheads, Phillips, Allen, and Torx have flat, ×-shaped, hexagonal, and hexagrammal tips, respectively). ... For other uses, see Hexagon (disambiguation). ... For other uses, see Square. ... “ISO” redirects here. ...


By design, TORX head screws resist cam-out better than Phillips head or slot head screws. Where Phillips heads were designed to cause the driver to cam out, to prevent over-tightening, TORX heads were designed to prevent it. The reason for this was the development of better torque-limiting automatic screwdrivers for use in factories. Rather than relying on the tool slipping out of the screw head when a torque level is reached, and thereby risking damage to the driver tip, screw head and workpiece, the drivers were designed to consistently achieve a desired torque. Camcar LLC claims this can increase tool bit life by ten times or more. To cam out (or cam-out) is a process by which a screwdriver slips out of the head of a screw being driven once the torque required to turn the screw exceeds a certain amount. ... Screws come in a variety of shapes and sizes for different purposes. ... Screws come in a variety of shapes and sizes for different purposes. ...


The TORX drive system was developed in the Camcar Technical center, located in Rockford, Illinois.


TORX screws are commonly found on automobiles, computer systems (Compaq uses almost exclusively T15 screws) and consumer electronics, but are also becoming increasingly popular in construction. Do-it-yourself mechanics will often remove the TORX screws on a vehicle and replace them with more common screws and bolts such as hex head bolts, because it is easier to carry an adjustable wrench (or a set of hex sockets) to fit many different sizes of hex heads, rather than carrying several different sizes of TORX screwdrivers or bits. Another reason is that larger Torx bolts are more prone to stripped head when manually removed compared to same sized hex bolts. “Car” and “Cars” redirect here. ... This article is about the machine. ... Compaq Computer Corporation is an American personal computer company founded in 1982, and now a brand name of Hewlett-Packard. ... Consumer electronics is a term used to describe the category of electronic equipment intended for everyday use by people, the consumers. ... A bolt may be one of the following things: For bolts and capscrews, see Bolted joint. ... There are three kinds of fastener given the name bolt. ...


Camcar LLC developed an improved profile , designated TORX PLUS.


Sizing

TORX head sizes are described using the capital letter "T", followed by a number. A smaller number corresponds to a smaller point-to-point dimension of the screw head. Common sizes include T10, T15 and T25, although they reach as high as T100. Only the proper driver can drive a specific head size without risk of ruining the driver or screw. The same series of TORX drivers is used to drive SAE, metric and other thread system fasteners, reducing the number of bit sizes required. The Society of Automotive Engineers is a professional organisation and standards body for the engineering of powered vehicles of all kinds - cars, trucks, boats, aircraft and more. ... The metric ISO screw threads are the world-wide most commonly used type of general-purpose screw thread. ...


Variants

Security TORX driver
Security TORX driver
  • A version known as Security TORX or Tamper Resistant TORX (often shortened by Torx TR) contains a post in the center of the head that prevents a standard TORX driver from being inserted. Additionally, while a standard TORX screw may if necessary be used with a slotted screwdriver of appropriate size, this is not possible with a Security TORX.
  • An external TORX version exists, where the screw head has the shape of a TORX screwdriver bit, and a special TORX socket is used to drive it. These are found primarily on automobile engines.
  • A TORX variant, TORX PLUS, is designed to allow greater torque, and to minimize wear. Currently, TORX PLUS heads and drivers are patented, slowing adoption in the marketplace. Standard TORX drivers can be used to drive TORX PLUS screws, but TORX PLUS drivers will not fit standard TORX screws. There is also a tamper resistant version of TORX PLUS, having five lobes and solid post in the center. 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.
  • A hex-lob variant, TTAP, is designed to allow greater stick-fit, and to minimize the wobbling. Currently, TTAP heads and drivers are patented, slowing adoption in the marketplace. Standard TORX drivers can be used to drive TTAP screws, but TTAP drivers will not fit standard TORX screws. There is also a tamper resistant version of TTAP.

Wikipedia does not have an article with this exact name. ... Wikipedia does not have an article with this exact name. ...

External links

  • Standard TORX Dimensions (WIHA)

  Results from FactBites:
 
Torx screws, machine screws, security, metric, self-tapping fasteners (572 words)
Torx screws, machine screws, cap screws, thread forming screws, self-tapping screws, thread cutting screws, pan head, flat head, button head, high round socket head screws can be purchased on this web site.
In this regard we have provided a page on this web site where you can go to find more information about Torx screws.
It will be updated quite frequently to respond to questions that we receive as the web site matures.
Torx - Wikipedia, the free encyclopedia (360 words)
Torx is the trademark for a type of screw head characterized by a 6-point star-shaped pattern (in the same way that flatheads, Phillips, Allen, and Robertson have flat, ×-shaped, hexagonal, and square tips, respectively).
Torx screws are commonly found on computer systems and consumer electronics, but are also becoming increasingly popular in construction.
Torx head size is described using the capital letter "T" followed by a number.
  More results at FactBites »

 
 

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