The four types of screwdrivers are flathead screwdrivers, Phillips head screwdrivers, Torx screwdrivers, and hex head screwdrivers. Flathead screwdrivers have a single straight slot that is used to turn flathead screws.
Phillips head screwdrivers have a cross-shaped tip that fits into a similarly-shaped hole in Phillips screws. Torx screwdrivers have a star-shaped tip that is used to turn Torx screws. Finally, hex head screwdrivers have an Allen-wrench shape and are designed for turning hex head screws.
Why is it called Phillips head?
The Phillips head screw was invented by Henry F. Phillips in the 1930s. He wanted to create a screw that would be easier to drive using a screwdriver than traditional slotted screws. He designed the head of the screw to be subtle, with a rounded edge that would allow for better torque when using a screwdriver.
It also had a slightly tapered shape, with indentations on the sides so that the screwdriver would have more grip. His design was so successful that it was patented in 1932 and became known as the Phillips head screw.
The name “Phillips head” is derived from Henry Phillips and his invention, used to describe the now-common screwhead.
What tool is used to loose and tight different screws?
A tool used to loosen and tighten different screws is a screwdriver. A screwdriver is a handheld tool used to drive screws and you can use it to fasten and loosen screws. Screwdrivers come in various sizes and shapes to fit a variety of screws, and they also come in a variety of handle lengths.
Different types of screwdrivers include Phillips head, flathead, Torx head and hex head. It is important to choose the correct size and shape of screwdriver for the job to ensure that it does not strip the head of the screws.
Many screwdrivers have a built-in tip that is reversible, allowing for the loosening and tightening of screws with a single tool.
How many types of screwdrivers are there?
And the exact number can vary depending on who you ask. Generally, the three main categories are flat head screwdrivers, Phillips head screwdrivers, and Torx screwdrivers.
Flat head screwdrivers have a flat and straight blade which fits into the groove of the screw head and is used to drive in screws with a standard slot. Phillips head screwdrivers often look like a cross and are commonly used in furniture and appliances.
They are a great choice for materials like metal, as the angles of the head fit into the indentation of the screw to provide leverage.
Torx screwdrivers are designed specifically for screws with Torx heads, which are generally found in computers, electronics, and precision machines. These screwdriver heads have star-shaped indents and are usually used in situations where a high level of precision is required.
In addition to those three main types, there are other specialty screwdrivers such as tri-wing, spanner, and hex head, which are all designed for specific applications. Depending on the job, you may also need to have an extra long screwdriver or an offset screwdriver.
Why do they call it Phillips screwdriver?
The Phillips screwdriver is named after its inventor, Henry F. Phillips (February 1, 1889 – December 5, 1958). Phillips patented his invention in 1934 and it quickly became an industry standard in the United States.
Phillips developed the unique shape of the screwdriver as a way to reduce slippage and make driving screws easier and more secure. The Phillips screwdriver has a cross-shaped blade which fits into a four-lobed recess in the screw head and creates an evenly distributed contact force between the mating surfaces, helping to reduce stripping of the screw head and the screwdriver itself.
This allows a user to apply more torque to the screw and makes the process of driving screws much less labor-intensive, particularly when working with hard materials such as metals.
How do you use a ratchet offset screwdriver?
Using a ratchet offset screwdriver is relatively simple. First, make sure the screwdriver bit is locked in place firmly. Next, align the blade of the screwdriver with the screw head you will be working on.
Ensure the offset feature of the screwdriver is set in the position you need. After that, simply use the ratcheting mechanism to turn the screwdriver. Push the handle forwards to turn the screw clockwise and pull the handle back to turn it counter-clockwise.
You can control the speed of the ratcheting mechanism by pressing the lever located in the handle. You can also tighten or loosen the screw by pressing and holding the lever located in the handle to Engage the Quick-Lock function.
When finished, release the lever so the screwdriver mechanism will stop.
How do I know which screwdriver to use?
The most important factor in determining which screwdriver to use is the type of screw that you’re dealing with. Different types of screws require different types of screwdrivers. Flat-head screws, for example, are best for installing cabinets, door frames and furniture and require a flat-head screwdriver.
Philips head screws, on the other hand, are commonly used in electrical applications, and require a Philips head screwdriver.
It’s also important to consider the size of the screw you have. If you have a small screw, you’ll likely need to use a screwdriver with a small head to ensure that the head of the screwdriver fits snugly into the head of the screw.
Additionally, depending on the material you’re working with, you may need to use an impact screwdriver. Impact screwdrivers exert more power than regular screwdrivers, making it easier to drive screws into harder materials such as concrete and metal.
Finally, if you’re having trouble with a particularly stubborn screw, you can also invest in an adjustable screwdriver, which will allow you to adjust the torque of the screwdriver to suit your needs.
Ultimately, choosing the right screwdriver depends on the type and size of the screw and the material you’re working with. With the right information, you should be able to easily find the right screwdriver for the job.
Why are there no Robertson screws in America?
Robertson screws are an older type of screw developed in 1908 by Canadian inventor and toolmaker, P. L. Robertson. The unique shape of the screws—resembling a square with slightly rounded corners—is designed to resist cam out, meaning that the head of the screw won’t slip or strip from the screwdriver when being driven.
These screws have a much higher torque than the typical Phillips head screw, allowing them to be driven faster and be used in more applications. Popular at one time in Canada, Robertson screws are still found in vehicles, appliances, and furniture in Canada, but they are hard to find in the United States.
The main reason that Robertson screws are not as common in the US is due to their dominance of the Phillips head screw, which were developed and patented by Henry F. Phillips in 1932. The Phillips head has become the dominant screw type in the U. S.
due to the mass production capabilities and general availability of the screws. Phillips-head screws are much easier to mass produce, as the shape only requires one mold, whereas Robertson screws require four molds, thus making them considerably more expensive.
In addition, Phillips-head screws can be used in many modified forms with hardly any change in function.
Today, almost all fasteners in the US have replaced Robertson screws with Phillips-head screws, although Robertson screws can still be found in many of the same applications they were used in when they were first developed.
Robertson screws are slowly making a comeback in the US, however, as they are becoming increasingly popular among hobbyists, crafters, and custom auto shops due to their greater strength, efficiency, and one-of-a-kind shape.
How do you unscrew a tri head screw?
To unscrew a tri head screw you will need to use a tri head screwdriver. An ordinary screwdriver is not compatible with a tri head screw. To begin, select the right size and shape tri head screwdriver that fits into the slots of the screw head.
Make sure that the screwdriver is inserted all the way into the screw head to ensure a secure fit. The upper and lower edges of the screwdriver should fit in slots of the screw head. Once properly secured, apply pressure counterclockwise to begin unscrewing the screw.
You may want to use a pair of needle-nose pliers to help grip and turn the tri head screwdriver if necessary. If the screw is particularly tight and hard to turn, try using a penetrating lubricant such as WD-40 first to help loosen it.
Just be sure to give the lubricant enough time to seep in before attempting to unscrew the tri head screw. With patience and the right tools, the tri head screw can be easily removed.