What are the types and types of screwdrivers?
Various types of bolts and screws are used to fasten or connect elements, which differ in shape and size. In order not to damage them when screwing, we need to use a screwdriver with the correct tip .
For every task, which we intend to perform, e.g.. in carpentry or electrical work, we have to use a different type of screwdriver. They differ in size, shape and tip, which must match the type of screw you are removing or tightening. Even a basic set, usually used for daily work, should contain several screwdrivers of different sizes and shapes, e.g.. straight screwdriver and curved for hard-to-reach places, as well as some specialized ones, e.g.. insulated electric, cross, or the key
with hexagonal tip.
Ordinary screwdrivers have an ergonomically shaped handle that is permanently attached to the steel blade, the tip of which is adapted to the cut or cross head of the screw or bolt. Two types of handles are most commonly used: for carpenters and for mechanics. Carpentry-type handles were made of wood, but now they have been replaced with plastic. They have the shape of a flattened pear, which allows you to firmly grasp the tool and easily manipulate it, and when loosening or tightening the screws, it also allows for a better torque and contact with the screw. Mechanic screwdrivers have a serrated handle, which in turn allows for efficient grip with oil-soiled hands. Both of the above-mentioned types of screwdrivers are available with different blade lengths and bits of different sizes. It is good to have several screwdrivers to tighten screws of different dimensions. A screwdriver with a stubby handle and a very short blade is very useful. Suitable for screwing loosening gaps in hard-to-reach places.
If we screw in a large number of screws, using an ordinary screwdriver is not convenient – you can get calluses on your hands.
When using a ratchet screwdriver, the so-called. "rattle”, there is no need to release the handle grip. The ratchet mechanism allows the screw to be guided in a series of turns, ;during which the handle returns to its original position, in preparation for the next turn. A screwdriver with a spiral ratchet works similarly, but we turn it by pressing the handle down. Most screwdrivers of this type have interchangeable blades.
Phillips screwdrivers and others
You will need a Phillips screwdriver for screwing in or out of screws with a cross cut in the head. Although they look similar, keep in mind, that there are several types of Phillips screwdrivers. The variations in the tip profile are subtle, but for larger jobs, a good screw head fit can be important. It is best to have one of each type of screwdriver; Size No. 2 should fit the most common bolt sizes. Suitable Phillips sockets for ratchet and spiral screwdrivers are also available. With specialist screwdrivers, a small narrow one is most often needed for electrical work (preferably with a voltage tester), as well as a few for unscrewing screws with a hexagonal socket head, the so-called. Allen's key), which are often used in the assembly of furniture.
For very tight screws, especially in metal, you can use an impact screwdriver, the tip of which rotates under the impact of the hammer on the handle.