Basic knowledge of power tools

Definition: A general term for tools and equipment powered by DC or AC motors.

Second, the characteristics of power tools: light, easy to carry, high work efficiency, low energy consumption.

Use and classification

one Industrial use: drilling, tapping, sawing, rust removal, polishing; Most of these tools are professional tools with high technical content and high cost.

Household tools: decoration, repair, installation, garden; This kind of tool is not too technical, but it looks good.
Other methods of power tools classification:

Sanding category: flat sand, triangular sand, round sand, waxing machine, Angle grinding

Cutting class: electric planer, gun drill, curve saw four, classification of power tools

Metal cutting: profile cutting machine, steel pipe saw, electric scissors

Sanding: grinding wheel, Angle grinding, electric grinding, waxing machine, sanding machine

Assembly: Screw batch, electric wrench, electric riveting gun

Divided by use

Building road category: vibrator, agitator, electric hammer, slotting machine

Mining: rock drill, coal electric drill

Garden category: pruning machine, micro-cultivator, soil ripper, lawn mower

Woodworking: woodworking electric drill, bakelite milling, electric circular saw, electric planer

Other: such as dental drill for medical equipment, sternum saw

5, according to the electrical safety protection method (grounding, double insulation, safety voltage)

Class I tools: More metal shell, only basic insulation, voltage greater than 50V, grounded.

Class II tools: double insulation, voltage greater than 50V, no ground.

Class III tools: Use extremely low safety voltage.

Five, the structure of power tools: there are mainly six parts

Housing: Support and protection

Motor: There are mainly DC, series excitation, asynchronous three

Transmission mechanism: change speed and direction (belt drive, gear drive, coupling)

Working head: working part, the mode of rotation, reciprocation, vibration, impact

Switch and internal line: there are many types of switches, and the internal line has the effect of inhibiting magnetic interference

Handle: Hold and install the switch

Six, the main parameters of power tools

Voltage, current, frequency, speed, power, weight, shape and size, as well as a variety of power tools proprietary parameters, such as the thickness of the curve saw.