What it consists of a screwdriver: screwdriver, which are, their labeling

Every professional repairman or a regular handyman has in its set screwdriver tools. This is an important device, since the range of tasks that it can solve quite broad. Normal and even a little primitive tool greatly simplifies the workflow when unscrewing and screwing of different fasteners.

Sometimes a screwdriver is used not for its intended purpose. Therefore, it is very helps any employee. It should be noted that there are several kinds of screwdrivers and, if necessary to carry out any repairs need to pick the right tool. This will help avoid various inconveniences when performing tasks.

Today we will talk about what it consists of a tool, the principle of its operation, as well as what it is.

What is a screwdriver, which elements are included in it

Screwdriver - a special hand tool. Purpose it - tightening and unscrewing the fasteners with thread (most often bolts and screws).

At the head of fastener has a slot (slot), depending on its type and the selected tool.

In most cases, a screwdriver is a metal rod with a head and a handle which may be made of various materials: plastic, rubber and others. In GOST 2938-92 can find information that can be attributed to a screwdriver, some kinds of keys, for example, face, and the keys to the ring nuts.

As already mentioned, a simple screwdriver is composed of the following elements:

1. Lever. It provides the most convenient use of the tool. The handle is made of various kinds: pentagonal, hexagonal, etc.. An important parameter - the size of the handle.
2. Kernel. It is made of metal, mostly from chrome vanadium alloy. The thickness and length of the rod is selected according to the hole size.
3. Sting. This tip of the rod. Sting is chosen according to the shape of the slot on the holder.

However, there are special screwdriver, which, by their appearance and structure are different from the classical instrument. For example, the reverse has on the rod a special mechanism that allows you to tighten or loosen the fastener, without taking away the slot.

There are a screwdriver, which are not at the end of the tip. Usually such a tool a set of removable terminals, so just buy one set, and do not keep in the garage the whole lots of different options.

There is another kind of screwdriver - shock. She is hidden in the handle of a rotary mechanism, which upon striking the arm unscrews fastener.

Operating principle

In order to perform loosening or tightening fasteners, perform the following steps:

• insert slot exactly Risk fasteners;
• screw it clockwise or unscrew counterclockwise.

If the handle has a button to activate the various functions, you can use them.

What are screwdriver

There are many varieties of screwdrivers, and each of them performs a variety of tasks.

We will not write a lot of the usual variations, since with them everything is clear: Phillips allows you to manipulation of the screws, in which recesses in the form of a cross on the head, and the flat unscrews screws and tightening the one a straight groove.

Now let's Let us examine in more detail screwdriver special purpose:

1. Dielectric. It allows you to work with elements of electrical and power equipment. Feature - withstand a lot of stress.
2. Reversible. Thanks to a special mechanism in the handle allow to carry out the work with fasteners without leaving a sting.
3. Hex. They torque is 10 times higher than the standard tool. Most often they are used to working with the equipment, electrical appliances.
4. Zvozdoobraznye. They are equipped with an asterisk at the end of the rod. Use this tool to work with electrical engineering. With this type of grooves are cut in the tip not fasteners.
5. Square. Equipped with a square tip.
6. The U-shaped. Made for fasteners with two holes in the cap. They can do it yourself by cutting a classic flat tip.
7. Triquetrous. Have a triangular tip.
8. One-way. This fixture is used where it is necessary to fix additional protection. Unlike fasteners such that it can only spin, but you can not unscrew.
9. Drums. It allows you to unscrew the fastener, which is covered with rust. It is used in cases where it is impossible to unscrew the fastener classic screwdriver.
10. With flexible shaft. They allow you to work with fasteners in tight conditions. It is used when working with cars or furniture assembly.

marking screwdrivers

To screwdriver exactly came under a particular fixture, you must pay attention to its labeling. In accordance with the GOST labeling "encrypted" type of slot, the length of the rod and numbering fasteners.

Let's take a closer look at the labeling:

1. SL. Flat.
2. PH. Phillips.
3. PZ. Phillips with a guide.
4. HEX. Hexagon.
5. TORX. A star.

More detail all markings are listed in the table.

Also marking can contain digits. For example, a screwdriver PH3x150. This set of numbers and letters mean she Phillips, fit fasteners No. 3 (5-7 mm), and the length of its shaft 15 centimeters.