Torque wrench specifications model, classification and use method

Torque wrenches are also commonly called torque wrenches, which are a type of wrenches, usually divided into two types: electric torque wrenches and manual torque wrenches. Torque is the product of force and distance. When tightening fasteners such as screws, bolts, and nuts, you need to control the amount of torque applied to ensure that the tightening of the thread does not damage the thread due to excessive torque. To operate. So what are the specific torque wrench specifications and models?

 

Torque wrench specifications

 

The type of torque wrench is generally determined according to its torque range, such as WEC4-340AN: that the maximum torque value is . 340N . m. The size of the square tenon is the same, with 1/4 ", 3/8", 1/2 ", 3/4", etc., as well as fractional display and mechanical type. Torque wrench specifications range is generally 1-5N, 5-25N, 10-50N, 20-100N, 40-200N, 70-350N. There are many brands of torque wrenches. Torque wrenches of different brands have different specifications and models.

 

Classification of torque wrenches :

 

　　 According to the display mode and working principle of torque instruments, torque instruments are divided into three categories :

1. Torque meter

According to the reaction of the force, the torque is applied to the force measuring point from the outside to drive the lever mechanism with a certain load inside the instrument. The transmission mechanical gear causes the pointer on the dial to rotate regularly under the force of the external force, thereby The torque value that appears

2. Torque batch

Torque screwdrivers are also called torque screwdrivers. According to the characteristics of the force, the action of applying force in the negative direction is adopted. When the externally applied torque reaches a set value and is equal to the internally set force value, the internal shift mechanism acts and a click sound can be heard. Indicates that the preset value has been reached.

3. Torque wrench

Also called torque wrench, the principle is similar to that of torque wrench. The lever principle is used in conjunction with the jump mechanism. When the externally applied torque is greater than the internally set force value, the internal jump mechanism acts and unloads, indicating that the preset force value has been reached, and at the same time you can hear the sound.

 

How to use torque wrench

 

1. When using a torque wrench, it is most appropriate when you hear a "snapping" sound .

2. In the use of torque wrenches , first of all, a moderate range should be selected according to the requirements of the measuring parts. The measured torque value should not be less than 20% of the range of the torquer in use. The too large range should not be used for small torque parts Reinforced, small range of torque can not be used over-range

3. When using a torque wrench , first connect the stress pawl to auxiliary accessories (such as sleeves , various types of mouths ) to ensure that the connection is no problem. Before reinforcing the torque, set the value of the force to be reinforced, lock the locking device, and then adjust the direction switch to the direction of the force.

The relevant content of the torque wrench specifications and models is introduced here for everyone. The torque wrench wrench is actually used to tighten the bolts, so the torque wrench is used in many industries, and we often see this tool during car maintenance. With this tool, the work efficiency of maintenance personnel has been improved.

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