Whether you are buying a new set of Torx tools or replacing a broken one, you will need to make sure you buy the right size. There are three standard sizes of Torx, and each one can be distinguished by the T before a number. In addition to these, there are also specialized sizes that are designed for specific uses. You can browse the chart below to find the right tool for your project. While it’s common to use the terms Torx and star interchangeably, there’s actually a bit of a difference between the two. Much like the Allen wrench, Torx is a trademarked name and refers to a specific brand, whereas star is the generic name (much like hex keys). However, there is a difference beyond just licensing. Another bit of terminology that can be confusing is when referencing internal Torx vs external Torx. When talking Torx bits, we’re actually referring to an internal Torx head. In other words, the bit is inserted into the head of the fitting.

Many consumers feel that star bits are better than Torx because the latter uses a restricted manufacturing license to use the patterns. Yet star bits are so closely matched to the shape of Torx that they can easily be used as a substitute. The Torx screwdriver was invented by Camcar Textron in 1967. It is considered one of the most efficient fastening systems. The design has six points and a center pin. This design allows for more torque and minimizes wear.

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Thus, while Torx offers tremendous advantages over traditional fasteners hex, the Torx Plus is a better option for assemblies that need a tighter grip. Advantages of Torx Plus The metric system is a good fit for larger distances. It is not as accurate for smaller distances. Tamper-Proof The metric system is also the standard for airplanes and boats. To make the process of repairing vehicles easier, the SAE standardized the measuring system. It's also been adopted by major vehicle manufacturing hubs in other countries. A key advantage of the Torx system is that is allows higher torque transmission than other drive systems enabling fastenings to be tighter and therefore more secure. could happen on cheap fasteners. Motorcyclists have been using them for years, as the exterior of many bike have Phillip head fasteners, and one likes to keep them looking good. As both a motorcyclist and an avid classic car collector, these or the only tools I use on my machines for Phillip head fasteners.

The Torx Plus Drive system was developed to improve assembly line performance. Alignment difficulties between drive bits and recesses can slow down production lines. The Torx Autosert feature guides the driver bit accurately into the recess creating a self-centering engagement action.

The Torx Ttap drive is compatible with the standard Torx drive. However, if you’d like the advantages the Torx Ttap offers, you have to use it with the Ttap drive. The geometries of these drives are exactly the same, except for the additional recess in the screw head’s center. Uses of Torx Ttap Another advantage is that the Ttap drive doesn’t wobble since the geometry stabilizes the drive. Torx Ttap vs. Torx screws Some versions of the Polydrive systems have more lobes in the fastener heads, although this isn’t common. Torx vs. Polydrive (RIBE) Screws There are also a lot of emergency DIY methods out there, such as softening a piece of plastic and shaping it to fit. However, these other methods are just as prone to failure. In the end, it’s usually much cheaper to simply buy an actual star bit set. Torx Bit Sizes Charts Internal Star Bit Sizes Size Torx is an innovative fastener system designed to overcome the shortcomings of traditional screw fasteners.

These fasteners also don’t wobble, so they’re suitable for applications that require high accuracy, like electronics and automobile industries. Polydrive (RIBE) What is a Polydrive Screw? The main purpose of the tamper-proof design is to restrict unauthorized access to equipment or devices, especially in places where tampering could be harmful or costly. Torx Ttap What is Ttap Torx? The modified geometry improves durability and maximizes the torque available to the fastener. This increased torque allows the fastener to be fastened more securely without stripping the screw head. Sidewall Difference Its dimension also facilitates a secure fit between the drive and fastener head, allowing even greater torque transmission. Tamper Proof vs. Standard Torx ScrewsAs previously noted - the original Torx drive system was developed by Camcar Textron in 1967. But this early specification has undergone some beneficial development and improvement highlighted in this post. Drive System Issues in Production Here’s a summary of just some of the issues associated with various typical, commonly used drive systems. Hex Drive A tamper-proof Torx screw requires a specialized wrench or driver bit with a central hole to accommodate the screw’s center post, deterring unauthorized removal.