Pneumatic wrench is a torque wrench with high pressure air pump as power source. As a member of the pneumatic wrench, mini air wrench is a kind of pneumatic tool commonly used in the maintenance and decoration industry for dismantling and installing screws for a long time. Manufacturers are generally equipped with 12-24 sleeve, extension rod, direction section and other auxiliary accessories to apply to various types of screw removal and installation operations. Mini air wrench solves the difficulty of relying on pure physical manual wrench operation in traditional work. Because it is smaller than the general wrench, it reduces the fatigue of long-term operation. Greatly reduce people's work intensity. Mini air wrench is suitable for large factories, where the frequency of use is high and the air pressure is low, the customer needs large torque and small reaction force, and some auto production plants below M17 screw disassembly.

An air wrench is a torque multiplier with three or more layers of epicyclic gears driven by one or two powerful air motors. Torque is controlled by adjusting the gas pressure. To allow specific torque requirements to be set, each tool is equipped with a dedicated pneumatic torque control chart and correction report, and for further applications, the pneumatic torque wrench can be paired with a torque sensor for more accurate torque output. When the required torque is obtained, the air source can be turned off manually or automatically using a suitable loop system.

The pneumatic torque wrench is a hand-held rotary pneumatic tool that can accurately set the torque to complete the locking or removal of nuts and bolts. The control part is realized through the voltage regulator and power management system, and the mechanical part uses the planetary gear reduction mechanism [1] pneumatic torque wrench operation is quiet - less than 85dB(A), absolutely no impact, reducing the damage to the tool, the sleeve and the lock. These two factors can make the user of the tool comfortable operation, reduce fatigue, improve safety. Torque up to 300,000N.m.

The pneumatic torque wrench provides precise torque control - ±5% repeatability, with sensor + solenoid valve switch, repeatability up to ±2%. Pneumatic torque wrench with its small size, light weight, large output power per unit weight, can achieve large torque output, small reaction force, small environmental pollution, low cost advantages, widely used in aerospace, mining, petrochemical, railway, construction, heavy vehicle assembly and maintenance, heavy equipment loading and unloading and many other fields, especially in the product production assembly line has been widely used. Especially if you need a lot of torque.

Classification: Pneumatic wrench is generally divided into two categories, one is a conventional that is a very common impact wrench, one is a pulse pneumatic wrench, the difference between the two is that the former can not set torque, while the latter can. The pneumatic torque wrench belongs to the latter.