The drive is directly related to how the screw attaches to a surface. Some drives are better at avoiding stripping, which renders a screw useless, than others, but may also cost more money and be more difficult to find tools for.
External hex screws have a hexagonal head shape that protrudes from the surface. Some have built-in flanges, whereas others only have the hexagon shape as the full head. You can get good leverage on these screws since you turn the full head, rather than just an internal portion of the head. See more about hex bolts here. A Phillips screw is one of the most common. This screw has a cross-shape that helps self-center the screw to avoid it drilling at odd angles.
You can also use a drill with a Phillips screw because its self-centering design allows it to remain in place when you apply force from a drill.
However, too much force can strip the head quickly. Pizodrive screws look similar to the Phillips shape, except that they have a few more grooves in them that create a shape resembling a star. You can tell the difference between a Pozidrive and Phillips screw by looking at them from the side. The Quadrex head drive, also known as a Phillips square drive, is a combination of Phillips and square recess. It looks much like the Phillips design, except that the middle of the cross shape is squared rather than pointed, which can help prevent stripping when you apply more force.
Slotted head screws are what most people refer to as flathead screws, because they have one narrow opening for a flat screwdriver. In fact, slotted screws are supposed to strip , by design, to prevent you from overtightening them.
Slotted screws are best for projects that require a few screws that you can screw manually, rather than with a powered drill, which will often cause the screw to strip or cam out. These have a square center point that prevents cam outs. Triple squares are most commonly used when you need a high level of force without stripping the screw.
TORX screws have a 6-point star shape in the middle and are often used on electronics items , like computers and DVD players. One of the reasons these screws are becoming more popular in recent years is because of their ability to prevent cam out, which is especially helpful when building electronics.
Source: OEM Fast. TORX Plus screws have shallower grooves between the star points to allow a screwdriver or bit to have more contact with the screwhead, which will enable you to put more force on it.
Source: Global Industrial. Tri-Wing screws are a somewhat recent invention of the Phillips Screw Company, which offer both the ability to apply more force than you could to a regular Phillips screw and more security than other screws.
The Tri-Wing design needs a special driver to install and remove it, and its deep grooves allow for more torque from a drill. These screws are beneficial for use in public places that might fall victim to theft, like public restrooms, where expensive fixtures can be tempting for some. There are various types of tamper-resistant screws, all of which offer multiple levels of security:.
The most common type of tamper-resistant screw, the pin screw will have the same design as what their regular versions have, such as a cross-shape for a Phillips screw, but with an additional layer of security to prevent easy removal. Each head will have an additional pin in the design that requires a special tool to install and remove them. A Phillips screwdriver will not work to install or remove a tamper-resistant Phillips screw. Source: Toolstop. Sentinel screws offer high-level protection because you can only drive them one way.
They have a flat head with two small holes that require a special tool to install and remove them. There are a few more important things to note about different screwheads before you make a purchase:. We mentioned that quite a few screws are designed to prevent cam outs, while the makers of the slotted screw specifically designed it to cam out to stop the screw from overtightening. Unlike Phillips or pozidriv screwdrivers, much higher torque can be transferred with the same amount of force with no chance of tool slipping, even at high driving speed power tools, which makes its more reliable to use.
Torx types of screwdrivers comes in variety of sizes and uses a number system to determine the size of the tip like T8, T10, T15, T25 etc. It has six straight lobes, like hexagon. These are used to fasten often bolts rather than screws. You must have seen these bits in your ratchet box for tightening up or loosing hex bolts, nuts and screws.
No slipping or cam- out effect takes place while driving this hence most of the power driver tools can be fitted with hex arrangement bits and thus makes the production fast and with less error. In this article we have learnt about 6 most commonly used types of screwdrivers with their images. If you find anything missing or incorrect than lets us remind through your valuable comments.
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Skip to content. Table of Contents. What is Heat Exchanger? Leave a Comment Cancel Reply Your email address will not be published. Since these screws have such a unique slot, they are impossible to remove without a tri-wing screwdriver. These screwdrivers were first manufactured to be used in aerospace engineering, but are now easily found used in home electronics.
Tri-wing screwdrivers are expensive and not as easily available as other types of screwdrivers. However, their biggest benefit is that the can tighten to extremely high torque values. Also known as TAs, tri-angle screwdrivers have a triangle shaped tip for slotting into place on screw heads with triangular depressions. These screwdrivers are often used in the toys, electronics and appliances industry for increased security.
However, a hex screwdriver can also grip TA screws, so not many DIY or home tool kits contain tri-angle screwdrivers. Also known as three-prong or Y-tip drivers, the tri-point driver features a tip with three blades set at degree angles, making a Y shape. The screws made to work with these screwdrivers are quite popular in the electronic industry.
Tech giants like Nintendo and Apple use them in their phones, gaming systems, and other devices. Tri-point screwdrivers also address the security issues that accompany tri-angle screwdrivers compatibility with hex screwdrivers. Tri-point screws can only be worked with tri-point drivers. Not to be confused with the British term for a wrench, the spanner is also known as the Snake-Eyes screwdriver , pig-nose screwdriver, and drilled head screwdriver.
These strange screwdrivers are equipped with a two-prong tip — much like a barbecue fork — which is used to work flat-head screws with two tiny rounded depressions on either side of the head. This makes it virtually impossible to remove these types of screws without a spanner.
Since they are quite secure, these screwdrivers are usually used by maintenance workers on bus terminals, elevators, restrooms, and subways. Spanners are available in a size range of four to Also known as a bow tie screwdriver, these tools are used to work screws that have a bow-tie-shaped slot.
These screwdrivers are used throughout the automobile industry and were popularly used in old General Motors GM vehicles. A clutch screwdriver comes with improved torque and can withstand more turning force than others. However, the matching screws can also be loosened and tightened with slotted drivers. There is another, more secure, version that can be screwed by a slotted driver but cannot be loosened by one.
A bolster screwdriver consists of a type of nut welded to the top of the shaft beneath the handle. If a screw is stuck tight to a surface, you can loosen it by exerting extra torque, turning the welded nut with the help of a wrench. This allows this tool to withstand maximum pressure. The Frearson screwdriver, also known as the Reed and Prince screwdriver, is quite similar in design to the Phillips screwdriver with some subtle changes.
The tip of this screwdriver is equipped with a sharp point, unlike the Phillips screwdriver, which has bluntly rounded points. Moreover, the angle of the tip of a Frearson screwdriver is closer to 45 degrees than that of Phillips head screwdrivers. The unique shape of the Frearson allows the screwdriver to exert more torque than a Phillips head screwdriver. It also gives the Frearson screwdriver the ability to work on Frearson screws of all sizes, as well as a large number of Phillips head screws.
Because of this, the Frearson screwdriver is often used on nautical equipment. These screwdrivers, also referred to as JIS screwdrivers, have a cruciform shape like Phillips head screwdriver, but are designed to resist camming out. JIS screws can be found on many quality products imported from Japan. Even though JIS screws can be opened by Phillips and Frearson drivers, the process is not easy and can damage or split the head.
JIS-compatible screws have a small dot near the slot which distinguishes them from other types of screws. The above screwdrivers were classified based on the screws they worked with; however, many of these types of screwdrivers also come with variations in their handles and shank.
The alternative designs can help exert more torque and offer better clearance. Electric screwdrivers are also known as power screwdrivers or screw guns, and can easily and quickly work a screw, especially those with broken heads. These screwdrivers are run with small batteries, so they can be made in compact designs. Although not as powerful as other types of screwdrivers, they can easily fit in a tool belt.
Corded screwdrivers come with an electric cord. These types of screwdrivers are not popular, as they must be tethered to a nearby power source. However, corded screwdrivers give out a constant power supply and are extremely efficient. These screwdrivers are equipped with a rechargeable battery, which means they come with the benefits of both electrical and battery-powered screwdrivers.
Unfortunately, this also makes them bulkier and heavier, and as battery charge wears down, cordless screwdrivers lose torque as well. Magnetic screwdrivers have a magnetic tip that holds the screw in place, allowing users to put in or pull out the screw with one hand. More and more manual screwdrivers are being built with magnetic tips.
Also known as watch or eyeglass screwdriver, these are precision devices that work the tiny screws on pocket watches and eyeglasses. A ratchet screwdriver allows you torque to be applied in one direction.
Turning the torque in the opposite direction will allow the ratchet to disengage, allowing free rotation. This type of screwdriver allows the user to keep hold of the screwdriver while turning it until the wrist reaches its maximum twist.
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