大白屁股We tell you how to choose a high-precision tool
for tightening joints
Torque tool - a device with a mechanism for measuring the torque. The design of the key is a ratchet, in the drive of which a measuring mechanism is integrated. Using this tool, the fasteners are precisely tightened to the required torque. Often, a key with a built-in dynamometer is used for repair and maintenance of cars, industrial equipment, construction equipment and high-tech mechanisms. Strongly or slightly tightened fasteners can break, which will lead to significant damage to the mechanism. Torque wrenches are divided into three types:
Limit (snap or spring);
Indicator torque wrenches are divided into dial, dial and electronic. The latter type is considered the most accurate.
1. Torsion type
Torque wrench, torsion type. Measurement range from 0 to 20 kg.m. Drive size 1/2 “.
The torsion torque wrench works by bending the handle with a scale and a fixed arrow. The error of such keys is 5-20%. The torsion type of key works in both directions, so it is quite simple to use. In addition, the cost of this device is lower compared to other types of keys.
A significant drawback of torsion keys is the low accuracy of torque measurement. In addition, the key is inconvenient to use in hard-to-reach places, it requires control of the scale, which reduces the accuracy of the final tightening.
2. Limit type
The main feature of the torque limit wrench is considered to be the preset torque. The range of applied forces is from 0.5 to 150 kilograms, and the dimensions of the drive are 1/4 “, 3/8”, 1/2 “, 3/4”, 1 “. Some keys can work in both directions
Permissible error at the limit the wrench does not exceed 8%. We recommend checking the tool at the bench and adjusting it once a year. But you should not forget that in the extreme position, any torque wrench has an error. Therefore, so that the tool does not wear out, it should not be used at the maximum maximum values. such loads, the torque wrench will have to be checked and adjusted much more often than once a year.
3. Indicator type
Best Torque Wrench helps track fastener behavior. A scale with one or two arrows is built into the instrument design: installation and signaling. The first, setting arrow, is set to the required value of the tightening torque, and the second, signaling, arrow fixes the current value of the moment. When the arrows fit together, the tightening torque is reached. The indicator key can apply torque in both directions for working with both left and right threads.
Electronic torque wrenches guarantee an error of not more than 1%. The tool can be adjusted in several units of torque measurement: kg / m, kg / cm, Nm / m, Nm / cm, ft / lb. In addition, the electronic key is able to compensate for the temperature and remember the data of the last puff. Having reached the desired tightening torque, the key notifies you with a light and sound indication. It works in two-way mode