Electric tools play a significant role in modern industry and household maintenance. They come in a wide variety and have different functions. According to different classification criteria, power tools can be divided into the following categories:
First, classification by power supply mode
(1) Communication Tools (Rope)
Ac tools rely on external power sources and can meet the demands of various working environments, making them the mainstream in the field of power tools. However, their disadvantage lies in the need to connect power cords, which may be limited in some scenarios.
(2) Lithium Battery Tools (Cordless)
Cordless tools are renowned for their convenience and represent the future development trend of power tools. They are free from the constraints of power cords, making operation more flexible and especially suitable for use in situations without power sockets or where frequent movement is required.
Sencond. Classification by Tool Function
(1) Drilling type
Electric drill: It is suitable for drilling holes in materials such as wood, metal, brick and tile. It is a common product among power tools and also the category with the largest demand.
Impact drill: Based on the electric drill, it adds the impact function. Besides wood, metal and other materials, it can also be used for drilling holes in stone.
Electric hammer: An electric rotary hammer drill equipped with a pneumatic hammering mechanism and a safety clutch, suitable for drilling holes in hard materials such as concrete, brick, and stone.
(2) Cutting category
Curve saw: An electric saw that can cut along a curve and is suitable for cutting materials such as steel, wood, and plastic.
Angle grinder: It is mainly used for grinding steel, stone, etc. The commonly used grinding disc diameters are 100mm, 125mm, 180mm, and 230mm.
Marble machine: Generally used for cutting stone materials, it can be selected as either dry or wet cutting type.
(3) Assembly category
Electric wrench: It is a tool for tightening high-strength bolts, and its transmission mechanism is composed of planetary gears and ball helical groove impact mechanisms.
Electric screwdriver: It adopts a toothed clutch transmission mechanism or gear transmission mechanism and is used for loading and unloading threaded connection parts.
(4) Grinding category
Sanding machine: It is used to process some materials and objects that are uneven, have uneven thickness, or do not meet the process requirements, making them smoother and flatter.
Direct grinding mill: Applied in fields such as mining and metallurgy, building materials, chemical engineering, and metallurgy, it is used for processing cavity molds and fixtures.
(5) Others
Edge trimming machine: Mostly used for wood chamfering, metal edge trimming, strip edge grinding, etc., it is a motor-type edge trimming equipment with strong mobility.
Bakelite milling machine: It can be used for carving, trimming and grooving wood.
Car wash machine: It is used for cleaning vehicles and is a commonly used electric tool in car maintenance.
Garden tools: including hair dryers, chain saws, lawn mowers/brush cutters, hedge trimmers, etc., suitable for garden and outdoor environments.
Third, classification by insulation grade
(1) Class I tools
It is equipped with a grounding device, and all or most parts of the insulation structure have basic insulation. If the insulation is damaged, since the accessible metal parts are connected to the protective grounding or protective neutral wire installed in the fixed circuit through the grounding device, they will not become live parts and can prevent the operator from getting an electric shock.
(2) Class II tools
The insulation structure of this type of tool is composed of double insulation or reinforced insulation made up of basic insulation and additional insulation. When the basic insulation is damaged, the operator is separated from the live body by additional insulation to avoid electric shock. Class II tools must use non-replaceable power plugs and are not allowed to be grounded.
(3) Class III Tools
Powered by a safe voltage power supply. The effective value of the no-load voltage between the safety voltage guidance bodies or between any conductor and the ground shall not exceed 50V. For three-phase power supply, the effective value of the no-load voltage between the conductor and the neutral line does not exceed 29V. The safety voltage is usually supplied by a safety isolation transformer or a converter with independent windings. Protective grounding devices are not allowed to be installed on Class III tools.
Fourth, classify by usage scenarios
(1) Handheld power tools
These tools are portable and easy to operate, and are suitable for various working scenarios, such as electric drills, electric hammers, impact drills, curve saws, Angle grinders, etc.
(2) Desktop power tools
These tools are usually fixed on the workbench for use and are suitable for scenarios that require stable operation, such as electric planers and sanding machines.
The classification of power tools is diverse and can be divided according to power supply methods, functions, insulation grades, application scenarios and brand levels. Understanding these classifications helps users choose the appropriate power tools based on their own needs, improving work efficiency and safety.