In this article, we will discuss the common types of screwdrivers that are used in almost every industry.
Screwdriver is used for tightening or loosening the screw. A round rod with a flat end, having a handle at the other end is called a screwdriver. Length of a screwdriver is measured excluding handle. The length of a screwdriver varies from 50 millimetre i.e. 2” to 18”. A screwdriver has three main parts, as shown in the figure.
Parts of Screwdriver
Following are the main parts of a screwdriver:
Handle, generally wooden or plastic handles are fixed to the screwdrivers. In order to save the wooden handle from being broken, an iron is fixed to the handle.
The middle part between the balde and the handle is called shank. On its lower part tip or blade is made.
On the upper part either there is a hole through which a wire is passed or this end is made flat so that when this part is fixed to handle it does not allow the shank to move separately. These are generally made of carbon steel.
Blade is the lower part of the shank. It is alo known as tip. This part is hardened and tempered.
Types of Screwdrivers
Following are the types of screwdrivers, which are described below,
- Flat Head screwdriver
- Philips screwdriver
- Torx screwdriver
- Robertson screwdriver or square screwdriver
- Pozidriv screwdriver
- Hex screwdriver or hexagonal screwdriver
- Offset screwdriver
- Watchmaker screwdriver
- Clutch head screwdriver
- Frearson screwdriver
- Tri-point screwdriver
- Tri-angle screwdriver
- Tri-wing screwdriver
- Carpenter screwdriver
- Bolster screwdriver
- Multipurpose screwdriver
- Special types of screwdrivers
- Electrical screwdriver
- Torque screwdriver
- Corded screwdriver
- Cordless screwdriver
- Magnetic screwdriver
- Jeweler’s screwdriver
- Battery screwdriver
- Ratchet screwdriver
1. Flat Head Screwdriver
As its name indicates these types of screwdrivers are used for tightening or loosening different types of screws. These are available in small as well as larger sizes.
Flathead screwdrivers have a handle of wood or plastic fixed to them. According to needs, there are light-duty screwdrivers or heavy-duty screwdrivers. They have a flat tip.
2. Philips Screwdriver
Tip of these types of screwdrivers is different from that of others. This tip is pointed and is made after cutting four flutes. Philips screwdrivers are used where the screw have T cross-shaped groove at their heads. These screws are available in varying number measurements.
3. Torx Screwdriver
Torx screwdrivers are very common and are often used by automotive engineers. Sometimes they are also called star tips by an engineer. This driver has a star-shaped tip with 6 round lobes.
A Torx screwdriver has a low radial force due to the spherical geometry of the lobes, which improves the life of the screw and the screwdriver bit. Unlike Philips or Pozidriv screwdrivers, even on power devices with high driving speeds, too much torque can be transferred with no chance of equipment slipping, which makes it safer to use.
Torx type screwdrivers come in a variety of sizes and use a numbering system such as T8, T10, T15, T25, etc. to determine the tip size. As the number increases, the tooltip size increases.
4. Robertson or Square Screwdriver
The square screwdriver is also known as the Robertson screwdriver. A Canadian invented this screwdriver. Engagement of a fairly tapered square-shaped opening screw with a square projection, which involves no angle, neglects the cam-out effect, thus improving centralization.
A slight taper shape in front of the tool that provides a good locking with screws and hence makes it more suitable for use. These types of screwdrivers were first used by the Ford Motor Company for industrial purposes, as these drivers speed up production, reduce losses, and are highly reliable.
5. Pozidriv Screwdriver
Unlike the Phillips screwdriver, the pozidriv screwdriver has two cross marks that are offset at an angle of 45 degrees. These are widely used in European countries.
This shape does not completely overcome the cam-out effect but gives better resistance to slipping and provides more stability than Phillip screwdriver. So, it is used for use that requires huge torque for tightening of the screw.
6. Hex or Hexagonal Screwdriver
There is no sliding or cam-out effect when driving it, so most powerful driver tools can be fitted with hex arranging bits and thus, it produces faster and with less error.
7. Offset Screwdriver
The Offset screwdrivers have also flat blade. But no handle is used in these screwdrivers. Their shank is turned at 90 angle at both the ends and bits are made on both the ends. In cases of narrow or slanting spaces, where ordinary flat screwdriver cannot work, this offset screwdriver is used. It is shown in figure.
8. Watchmaker Screwdriver
Watchmaker screwdrivers are available in sets. In a set there are six screwdrivers, having number markings from 0 to 5. The smaller the number of the screwdriver, the smaller and thinner is its bit. In place of handle, a cap is fixed to the shank.
The cap is fixed to the shank in such a way that both cap and the shank can be moved independently. For tightening or loosening a screw, tip is placed at the head of the screw and cap is pressed with one finger, while with other fingers shank is rotated. Watchmaker screwdriver can be used in all kinds of instruments and watches. In appearance, it looks as shown in the figure.
9. Clutch Head Screwdriver
These types of screwdrivers are used throughout the automobile industry and are commonly used in older GM vehicles. The clutch head screwdriver is also known as bow tie drivers, these drivers are used to work screws that have a bow-tie shaped slot.
The clutch screwdriver begins with higher torque and can resist greater turning force. But, this type of screw can also be tight and loose slotted drivers. There is another safety way that it can be screwed by a slotted driver but not loosened.
10. Frearson Screwdriver
The tip of these types of screwdrivers is provided with a sharp point, unlike Philip Driver, it has bluntly rounded points. In addition, the angle of the tip is more like to 45 degrees than the Phillip drivers. This driver is used on nautical equipment.
The Frearson driver, also known as Reed or Prince, is pretty similar to the Philippe screwdriver in design, with some changes. The different shape allows the driver to take out higher torque than the Phillips and to operate on Frearson screws of all sizes as well as a large number of Phillip screws.
11. Tri-point Screwdriver
These types of screwdrivers are very familiar in the electronic industry and tech giants such as Nintendo and Apple apply them in their phones, gaming systems, and other devices.
The tri-point driver makes a tip that has three blades set at an angle of 120 degrees, which is Y-shaped. So, It is also known as 3-prong or Y-tip drivers. Tri-point drivers also has safety issues only that come with tri-angle driver compatibility with hex drivers.
12. Tri-angle Screwdriver
These types of screwdrivers were mostly used in the toy, electronics, and appliance industries and were added to improve safety. But, a hex screwdriver can also hold TA screws, so many DIY kits do not have tri-angle drivers.
It is also known as three-angle screwdrivers. It have a triangle-shaped tip for slotting on the screw head with a triangle shape.
13. Tri-wing Screwdriver
The tip of the tri-wing drivers resembles that of some pinwheels and is used to operate on screws that have triangular sockets with three wing sizes. Because, these screws have such a different slot, it is difficult to remove them without a tri-wing driver.
Tri-wing screwdrivers are costly and not easily available like other drivers. These drivers were previously manufactured for use in aerospace engineering, but now you can easily found it in home electronics.
14. Carpenter Screwdriver
The carpenter screwdriver is made of a round rod and flat tip. Its handle is made flat from two sides (as shown in figure). This enables the worker to exert full forces or the screwdriver.
15. Bolster Screwdriver
The bolster screwdriver has a type of nut, which is welded to the top of the shaft under the handle. If a screw is tightened on a surface, you can loosen it by applying additional torque by turning the welded nut with the help of a wrench.
The bolster screwdriver are able to withstand maximum pressure loads in any conditions.
16. Multipurpose Screwdriver
Multipurpose screwdriver has a shank with a hexagonal hole at the end where it can fit a variety of drivers on both sides, with drivers or depending on the use of the set. Because they offer more versatility and economy of space, they are a very common toolset among who have only basic requirements.
17. Special Types of Screwdrivers
Many of screwdrivers also come with changes to their handles and shanks. The optional design helps to eject more torque and offer enough clearance.
Following are the some of special types of screwdrivers:
1. Electrical Type Screwdriver
These types of screwdrivers are charged by electricity, which means that you do not need to use your muscles to exert torque. It can work a screw easily and quickly, especially those with a broken head. Therefore, it is also known as power screwdrivers or screw guns.
2. Torque Type Screwdriver
Torque is generally known for its application on cars, but the thing that pressure requires equipment. Torque type screwdrivers can offer highly specific uses including everything from military repairs to aircraft.
3. Corded Type Screwdriver
Corded type screwdrivers come with an electric cord. But, they are not very common as they need to be transported to a nearby power source. Still, they provide a constant power supply and are highly efficient.
4. Cordless Type Screwdriver
Cordless type screwdrivers are provided with a rechargeable battery which means that they come with the advantages of both electrical and battery-powered screwdrivers.
Accidentally, this makes them heavier and as the battery charge decreases, they also lose torque.
5. Magnetic Type Screwdriver
It has a magnetic tip that holds the screw, allowing you to insert the screw in or out with just one hand. More and more manual screwdrivers are now being manufactured with magnetic tips.
6. Jeweller’s Type Screwdriver
They are precision instruments that employ small screws on pocket watches and eyeglasses. It is also known as watch or eyeglass driver. They are of usually Philips and flat head screwdrivers.
7. Battery Type Screwdriver
Battery type screwdriver is operated with small batteries, which means they come in a compact design. Although it is not as powerful as other screwdrivers, they can easily fit into your toolbox.
8. Ratchet Type Screwdriver
In these types of screwdrivers, a spring or ratchet is fitted in the handle. There is a button at its handle. When this button is pressed, shank of the ratchet screw starts revolving through the spring.
When the button is left free, again the shank comes to its original position. With its help screws can be quickly tightening or loosened.
As you know now, A typical simple screwdriver has a handle and shaft that the user attaches to the screw head before turning the handle used for tightening or loosening of screws. If you want to buy a screwdriver, just checkout out image resources.
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