The difference between electric wrench, pneumatic wrench and torque wrench

An electric wrench is a power or battery powered wrench that is used to tighten bolts. Mainly used in steel structure installation industry, specially installed steel structure high-strength bolts. High strength bolts are used to connect steel structure joints, usually in the form of bolt groups.

Electric wrench features: 1. Easy to operate; 2. Save time and effort; 3. The price is high.

Pneumatic gripper, also known as the integration of ratchet gripper and power tool, is primarily a tool that provides high torque output with minimal consumption. It accelerates the rotation of an object with a certain mass through a continuous power source and then immediately hits the output shaft, thus obtaining a relatively large torque output. Compressed air is the most common power source, but electric or hydraulic power is also used. It is widely used in many industries such as automotive repair, heavy equipment maintenance, product assembly (often referred to as "pulse tools" for major construction projects, installation of wire screw sleeves, and anywhere else for high torque output.

Torque wrench also known as torque wrench or torque wrench or torque wrench. Torque is the product of force and distance. When tightening screws, bolts, nuts and other threaded fasteners, the applied torque should be controlled to ensure that the thread is tight and will not be damaged due to excessive torque, so the torque wrench should be used for operation. First, set the upper limit of the desired torque value. When the applied torque reaches the set value, the wrench will make a "stuck" sound or bend a little Angle at the wrench connection, which means that it has been tightened and no longer apply force.

Pneumatic plate hands are available in every standard ratchet socket driver size, ranging from small 1/4 "drive tool packs to 3.5".

Pneumatic wrench is generally not suitable for fastening the device body is ceramic. Tighten the plastic mounting parts.

Working principle of torque wrench

The principle of the torque wrench (torque wrench) producing the Kata sound is very simple and can be divided into the following steps:

1. The torque wrench is making a "Kata" sound, indicating that the torque value you require has been met;

2. Torque wrench issued 2. "Cata" It is generated by its internal torque release structure, divided into pressure springs. The torque release joint is composed of three structures.

3. First, set the desired torque value on the torque wrench (the spring sleeve on the top rod releases joint pressure to the torque), lock the torque wrench, and start tightening the bolts. When the bolt reaches the torque value (when the applied torque is greater than the spring pressure), there is an instantaneous disconnect effect. The joint knock produces a disjointed effect, and the metal housing of the wrench makes a "katta" sound. In order to confirm the reminder effect of the torque value (in fact, it is just like the principle that our arm joints are bent 15 degrees and will meet the steel pipe after being straightened in the iron pipe for a moment).

The above are the most commonly used manual torque wrenches, in addition to electric torque wrenches. Pneumatic torque wrench, etc.