What is a Torx Screwdriver?
Called Torx, 6 points, and star, Torx is a 6 pointed star-shaped screwdriver. Originally designed in the 60’s to outperform hex screws, Torx is a trademarked name for a screwdriver that fits Torx screws, commonly seen in sizes Torx 6 to Torx 40 (or T6 to T40).
Torx drivers come in a variety of shapes including regular straight Torx drivers, Torx keys or Torx L keys, and Torx screwdriver bits.
There are specialty variations of the Torx 6 pointed star shape such as Torx Plus, Security Torx, TX Tap but they are uncommon and typically only used in security applications.
Torx brand is a licensed product meaning that manufacturers need to manufacture to Torx licensed prints and specifications. To make an analogy, only Kleenex can make a product called Kleenex, but many manufacturers make facial tissues.
Chapman Star bits are precision manufactured to fit Torx screws, but we cannot call them Torx bits because we’ve added improvements that don’t qualify under official Torx licensing.
Unlike Torx screwdriver bits, Chapman Star screwdriver bits have a ball detent that lock into our tools without the use of magnets. This is essential for working on sensitive electronics where magnets can short out a PC board. They also feature our signature knurled end that provides good grip to finger tighten small and delicate fasteners. We manufacture the most common sizes S6, S8, S10, S15, S20, S25, S27, S30, S40 that fit screws T6, T8, T10, T15, T20, T25, T27, T30, T40. In summary, our Star bits are precision milled to fit Torx screws, but are an improvement over typical Torx screwdriver bits.
What is a Security Torx Screwdriver?
Security Torx or tamper-proof Torx screwdriver bits have the exact same exterior shape as regular Torx or Star screwdriver bits, but have a small hole drilled in the end to accept the small pin located in the center of security Torx screws. Security Torx drivers and screws were invented to use in applications where the manufacturer doesn’t want the typical person to have the tools to adjust or remove the screw. Unfortunately, they’re often used to try to prevent people from fixing their own appliances and equipment! That’s why Chapman manufactures the most commonly used security Torx driver bits in the following sizes: T8, T10, T15, T20, T25, T27, T30.
Torx Screw-Size Table
As noted, it’s important to match the size of the Torx screw or bolt socket head with the correct size of Torx screwdriver. Here’s a chart showing the standard Torx sizes.
Torx Size | Imperial Point to Point (inches) | Metric Point to Point | Max Torque Range |
T1 | .031" | .81mm | .02 to .03 Nm |
T2 | .036" | .93mm | .07 to .09 Nm |
T3 | .046" | 1.10mm | .14 to .18 Nm |
T4 | .050" | 1.28mm | .22 to .28 Nm |
T5 | .055" | 1.42 mm | .43 to .51 Nm |
T6 | .066" | 1.70 mm | .75 to .9 Nm |
T7 | .078" | 1.99 mm | 1.4 to 1.7 Nm |
T8 | .090" | 2.31 mm | 2.2 to 2.6 Nm |
T9 | .098" | 2.50 mm | 2.8 to 3.4 Nm |
T10 | .107" | 2.74 mm | 3.7 to 4.5 Nm |
T15 | .128" | 3.27 mm | 6.4 to 7.7 Nm |
T20 | .151" | 3.86 mm | 10.5 to 12.7 Nm |
T25 | .173" | 4.43 mm | 15.9 to 19 Nm |
T27 | .195" | 4.99 mm | 22.5 to 26.9 Nm |
T30 | .216" | 5.52 mm | 31.1 to 37.4 Nm |
T40 | .260" | 6.65 mm | 54.1 to 65.1 Nm |
T45 | .306" | 7.82 mm | 86 to 103.2 Nm |
T50 | .346" | 8.83 mm | 132 to 158 Nm |
T55 | .440" | 11.22 mm | 218 to 256 Nm |
T60 | .519 | 13.25 mm | 379 to 445 Nm |
T70 | .610 | 15.51 mm | 630 t0 700 Nm |
T80 | .690 | 17.54 mm | 943 to 1048 Nm |
T90 | .784 | 19.92 mm | 1334 to 1483 Nm |
T100 | .871 | 22.13 mm | 1843 to 2048 Nm |
Torx Sizes Chart
Torx screwdriver tool Recommended
For extra heads and accessories, you’ll want to take a peek precision screwdriver set. 40 The tips are made of S2 steel and even after a year of use, with proper care, they won’t show signs of wear and tear. Whether you need to crack into toys, fix a Play Station, or adjust a necklace, this kit can handle it.
“This set is complete enough to have the bits I need to open Macs and just about everything else,” wrote one reviewer who has a career in IT. “I like the hardness of the bits and the extensiveness of this set. It is cool that it even comes with a magnetizer and demagnetizer.”
Kingsdun is a precision screwdriver manufacturer, if you are looking for a Chinese screwdriver manufacturer, please contact us, we will give you the most sincere advice, thank you