The green circle, passing through the six points of contact between the two components, represents the direction of the rotational force being exerted at each of those points. The clearance between the components is exaggerated for clarity. The diagram depicts the interaction between the male and female components of a conventional hex drive and a Torx drive. The Torx design allows for a higher torque to be exerted than a similarly sized conventional hex socket head without damaging the head or the tool.
T50 torx driver#
Rather than rely on the tool to slip out of the screw head when a desired torque level is reached (which risks damage to the driver tip, screw head, or workpiece), torque-limiting driver designs achieve a desired torque consistently.
The development of better torque-limiting automatic screwdrivers for use in factories allowed this change.
T50 torx drivers#
Whereas the tendency of Phillips drivers to cam out under excessive torque has been listed as a feature preventing damage to the screw-head or driver, Torx heads were designed to prevent cam-out. (Exaggerated for illustrational purposes)īy design, Torx head screws resist cam out better than Phillips head or slot head screws. The angle between the plane of contact between tool and fastener and the circumferentially directed force is much closer to 90° in a Torx type of head (lower) than in a conventional hex head (upper). Torx screws are also becoming increasingly popular in construction industries. Initially, they were sometimes used in applications requiring tamper resistance, since the drive systems and screwdrivers were not widely available as drivers became more common, tamper-resistant variants, as described below, were developed. Torx screws are commonly found on automobiles, motorcycles, bicycle brake systems ( disc brakes), hard disk drives, computer systems and consumer electronics. Torx Plus, Torx Paralobe and Torx ttap are improved head profiles. This is sometimes abbreviated in databases and catalogs as 6lobe (starting with the numeral 6, not the capital letter G). The official generic name, standardized by the International Organization for Standardization as ISO 10664, is hexalobular internal. A popular generic name for the drive is star, as in star screwdriver or star bits. Torx (pronounced / t ɔːr k s/) is a trademark for a type of screw drive characterized by a 6-point star-shaped pattern, developed in 1967 by Camcar Textron.
A Torx T8 screw head on a hard disk drive.
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