What is Screwdriver?
A 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. The length of a screwdriver is measured excluding the handle. The length of a screwdriver varies from 50 millimeters i.e. 2” to 18”. A screwdriver has three main parts, as shown in the figure.
Parts of Screwdriver
The following are the main parts of a screwdriver:
Handle
Shank
Blade
1. Handle
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.
2. Shank
The middle part between the blade and the handle is called the 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.
3. Blade
The blade is the lower part of the shank. It is also known as a tip. This part is hardened and tempered.
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Types of Screwdrivers
The following are the types of screwdrivers, are described below:
Flat Head
Philips
Torx
Robertson screwdriver or square screwdriver
Pozidriv
Hex screwdriver or hexagonal screwdriver
Offset
Watchmaker
Clutch head
Frearson
Tri-point
Tri-angle
Tri-wing
Carpenter
Bolster
Multipurpose screwdriver
Special types of screwdrivers
Electrical
Torque
Corded
Cordless
Magnetic
Jeweler’s
Battery
Ratchet
1. FlatHead
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 and heavy-duty screwdrivers. They have a flat tip.
2. Philips
Philips Screwdriver
The 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 has T cross-shaped groove at their heads. These screws are available in varying numbers and measurements.
3. Torx
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.
Torx Screwdriver
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. The 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.
Robertson Screwdriver or Square Screwdriver
A slight taper shape in front of the tool provides 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
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.
Pozidriv Screwdriver
This shape does not completely overcome the cam-out effect but gives better resistance to slipping and provides more stability than the Phillip screwdriver. So, it is used for use that requires huge torque for tightening the screw.
6. Hex or Hexagonal Screwdriver
It has six straight portions like a hexagon. These are often used to fasten bolts instead of screws. You may be seen these bits in your bitcoin box to tighten or lose hex bolts, nuts, and screws.
Hexagonal Screwdriver
There is no sliding or cam-out effect when driving it, so the most powerful driver tools can be fitted with hex arranging bits and thus, it produces faster and with less error.
7. Offset
Offset Screwdriver
The Offset screwdrivers have also a flat blade. But no handle is used in these screwdrivers. Their shank is turned at 90
angles at both ends and bits are made on both ends. In cases of narrow or slanting spaces, where an ordinary flat screwdriver cannot work, this offset screwdriver is used. It is shown in the figure.
8. Watchmaker
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 the handle, a cap is fixed to the shank.
Watchmaker Screwdriver
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, the tip is placed at the head of the screw, and the cap is pressed with one finger, while with the other fingers shank is rotated. A watchmaker screwdriver can be used in all kinds of instruments and watches. In appearance, it looks as shown in the figure.
9. Clutch Head
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 a bow-tie driver, these drivers are used to work screws that have a bow-tie-shaped slot.
Clutch Head Screwdriver
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 safe way that it can be screwed by a slotted driver but not loosened.
10. Frearson
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 45 degrees than the Phillip drivers. This driver is used on nautical equipment.
Frearson Screwdriver
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
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.
Tri-point Screwdriver
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 a 3-prong or Y-tip driver. Tri-point drivers also have safety issues only that come with tri-angle driver compatibility with hex drivers.
12. Tri-angle
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.
Triangle Screwdriver
It is also known as a three-angle screwdriver. It has a triangle-shaped tip for slotting on the screw head with a triangle shape.
13. Tri-wing
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 different slots, it is difficult to remove them without a tri-wing driver.
Tri-wing Screwdriver
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 find them in home electronics.
14. Carpenter
The carpenter screwdriver is made of a round rod and a flat tip. Its handle is made flat from two sides (as shown in the figure). This enables the worker to exert full force on the screwdriver.
15. Bolster
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 is able to withstand maximum pressure loads in any condition.
16. Multipurpose Screwdriver
Multipurpose Screwdriver
The 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 those who have only basic requirements.
17. Special Types of Screwdrivers
Many screwdrivers also come with changes to their handles and shanks. The optional design helps to eject more torque and offer enough clearance.
Following are some of the special types of screwdrivers:
1. Electrical Type
Electric 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 for those with a broken head. Therefore, it is also known as power screwdrivers or screw guns.
2. Torque Type
Torque Type Screwdriver
It is generally known for its application on cars, but the thing that pressure requires equipment. This type of screwdriver can offer highly specific uses including everything from military repairs to aircraft.
3. Corded Type
Corded Type Screwdriver
This type of screwdriver comes 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
This type of screwdriver is provided with a rechargeable battery which means that they come with the advantages of both electrical and battery-powered screwdrivers.
Cordless Type Screwdriver
Accidentally, this makes them heavier and as the battery charge decreases, they also lose torque.
5. Magnetic Type
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
Jeweler’s Screwdriver
They are precision instruments that employ small screws on pocket watches and eyeglasses. It is also known as a watch or eyeglass driver. They are usually Philips and flathead screwdrivers.
7. Battery Type
Battery Type Screwdriver
This type of screwdriver is operated with small batteries, which means they come in a compact design. Although it is not as powerful as other screwdrivers, it can easily fit into your toolbox.
8. Ratchet Type
Ratchet Screwdriver
In these types of screwdrivers, a spring or ratchet is fitted to the handle. There is a button on its handle. When this button is pressed, the 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 tightened or loosened.
Conclusion
As you know, 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 screws. If you want to buy a screwdriver, just checkout out the image resources.
So now, we hope that we have cleared all your doubts about the screwdrivers. If you have still any doubts about the “Types of Screwdrivers” you can contact us or ask in the comments.
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