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In a broad sense, pneumatic tools are devices that utilize compressed air to drive pneumatic motors in order to generate mechanical energy. Based on their basic working principles, they can be classified into: 1) rotary type (with eccentric movable blades), and 2) reciprocating type (with volume pistons). Generally, pneumatic tools consist of main components such as the power output section, the mechanism for converting the mode of operation, the air intake and exhaust systems, the controls for starting and stopping the tool, and the tool housing. Of course, for these tools to function properly, there is also a need for an energy supply system, air filtration and pressure regulation mechanisms, as well as various accessories (such as pneumatic triple units). The power output section is one of the main components of pneumatic tools; it consists primarily of a pneumatic motor and power output gears. High-pressure compressed air is used to drive the motor blades, causing the motor rotor to rotate and thus generating rotational motion. The gears then transfer this motion to the rest of the tool’s components. Based on whether the stator and rotor are concentric, pneumatic motors can be divided into concentric motors and eccentric motors. According to the number of air inlet ports, they can be classified as single-air-inlet-port motors, double-air-inlet-port motors, and multi-air-inlet-port motors, among others. Regardless of the type, a pneumatic motor relies on compressed air to push the motor blades and thus rotate the rotor. As these blades spin at high speeds, they are in constant friction with the inner wall of the stator; they are the most common wear-prone components within the motor. Therefore, high standards are required regarding the quality of the compressed air, as well as whether it contains lubricant molecules. The task conversion section is primarily responsible for converting the rotational motion generated by the motor into the appropriate form. In the automotive manufacturing industry, due to the frequent use of threaded connections, most movements are rotational; however, there are also linear reciprocating motions. For different types of pneumatic tools, the mechanisms for changing the mode of operation mainly include mechanical clutches and planetary gear sets, friction disc clutches and planetary gear sets, hydraulic cylinders, torsion bars, and hammer assemblies. All the components mentioned above are essential parts that rely on rotational motion; they determine important parameters such as the torque level, rotation speed, and tightening accuracy of the pneumatic tightening tool. Due to continuous engagement/disengagement, compression, or changes in torque, the components that make up these parts are prone to damage. Intake and exhaust pathway section: Obviously, the intake and exhaust pathway section is the channel through which compressed air enters and exits, and it serves as the energy supply system that ensures the proper operation of the motor. The control section for starting and stopping the motion, namely the pneumatic switch as commonly referred to, is in constant direct contact with operators and external objects, and being made of engineering plastics, it is prone to damage. In the energy supply section, compressed air is primarily generated by air compressors that compress atmospheric air; it is then delivered through compressed air pipelines to the devices that require it, in a pulsating manner. The air filtration and pressure regulation section: Since compressed air is usually transported through pipes made of seamless steel tubes, over time rust on the inner walls of these pipes, as well as moisture and dust present in the compressed air, will continue to accumulate. If such compressed air is fed directly into the pneumatic motor without any treatment, it will lead to a **reduction in the motor’s lifespan**. This results in insufficient and unstable power output from the tool, and it can also cause successive damage to components such as the motor. Therefore, a compressed air filtering and regulating device must be installed between the compressed air supplied through pipes and the pneumatic tool, and the pneumatic trio serves this purpose. A pneumatic triple unit mainly consists of a pressure gauge, filter, oil mister, regulator, and other components. The filter contains a filter element, which needs to be maintained and cleaned after being used for a certain period of time, as well as replaced regularly. Tool attachments: Here, tool attachments refer to the tools that are mounted on the pneumatic tool itself and come into direct contact with the workpiece; the pneumatic triple unit is responsible for this function. A pneumatic triple unit mainly consists of a pressure gauge, filter, oil mister, pressure regulator, and other components. The filter contains a filter element, which needs to be maintained and cleaned after being used for a certain period of time, as well as replaced regularly ； If compressed air of this kind is fed directly into the pneumatic motor without any treatment, it will lead to a **reduced lifespan of the motor**. This results in insufficient and unstable power output from the tool, and can cause successive damage to components such as the motor. Therefore, between the compressed air delivered through pipes and the pneumatic tool, compression air filtering and regulating devices must be installed, including various types of pneumatic sleeves, connectors, adapter fittings, cutting heads, etc. Other information: Electric heating constant-temperature forced-air drying oven, Hangzhou Southern Surveying and Mapping, knife-type gate valve, infrared tablet press