A hand drill has the same functions as an electric drill. The article considers the advantages and disadvantages of the samples.
Kolovorot
It functions without batteries, electricity, performs the main function with the help of muscular strength. Simple arranged. The design includes a frame and a chuck holding a drill. The broken frame configuration provides a convenient grip of the handle, the ability to easily rotate the tool around the axis.
For convenience, when performing drilling with a rotary collar, another handle is provided at the top of the tool axis. It remains stationary during rotation.
The cartridge on one side is connected to the frame. Its other edge serves as a clamp for the drill. The most primitive samples do not have a cartridge; its functions are performed by a metal hollow part holding the drill shank.
Sometimes, conventional fittings, a curved metal pin sharpened at one end, were used as a rotor.
Hand tools allow you to drill a hole of the desired diameter. It can serve as a powerful screwdriver. To do this, you need to make a sting, the configuration corresponding to the fastener. It must be screwed or unscrewed. Advantages of the device: the ability to work without energy, the ability to operate at ultra-low speeds where you can not use a power tool.
Kolovorot reliable, almost never out of order.
Mechanical drill
The device consists of a housing with gears necessary to increase the speed of the drill. There is a handle for rotation, a support handle for holding the tool securely. The device includes a top stop and a chuck for fixing the drill. The working speed of drilling is greater than that of the rotor.
A hand drill can have 1–2 speeds. The drilling mode is selected by switching from one shaft to another by moving the handle.
A two-speed manual drill is capable of gaining high speed. This differs from the one-speed model.
If you need to drill at high speed, you need to switch from lower to upper shaft.
Using manual equipment, holes are made in the blanks of wood, its derivatives, plastic, metals, and other materials. If necessary, the tool will cope with the tasks of a screwdriver. To do this, it is enough to equip the cartridge with a bat.
For the first time a hand drill with the ability to switch speeds was released in the XX century.
Mechanical drills from the USSR are used today, but they are becoming less and less.
KRAFTOOL 29025 hand drill is suitable for drilling holes. The compact alloy steel tool is equipped with a chuck that allows you to set drills of various diameters (maximum - 6 mm). The drilling device of the Soviet model had impressive dimensions. This drill is more ergonomic and comfortable.
As a rule, a mechanical tool serves for a long time because of a simple design, practically does not break. Another advantage of the models is their low price.