How to choose a good torque wrench, according to the different torque values, please choose a different torque wrench, we recommend that the user in the purchase of the best choice of torque value range in the middle of the torque wrench, that is, 1/3-2/3 torque range, for example, we use 100NM torque to lock the screws, we recommend that you choose ET-150 (42-210NM range) rather than ET-80 (19-110NM range), so that the spring structure inside will not often touch the critical point, better protection and long term. 210NM range) rather than ET-80 (19-110NM range), so that the spring structure inside will not often touch the critical point, better protection of torque wrenches, and can be used for a long time.
1. Why choose a torque wrench to lock the screws, rather than removing the screws
Torque wrench is not a tool, it is more appropriate to say that it is a gauge, the general screws we can use a ratchet wrench or an ordinary wrench to dismantle can be used to use the force is based on the size of the individual's power to determine the degree of screws locking, and mechanical equipment and other important parts of the screws, the need for a certain value of torque to achieve the most appropriate level of torque. The value of the torque to achieve the most suitable, that is, will not damage the screws and ensure that the use of the need; dismantle the screws, there will be instantaneous strong, even if the newly installed screws, and then dismantled, this loosening force is much greater than the maximum torque just installed, it is easy to cause damage to the torque wrench.
2. Torque wrenches accurate recalibration
Torque wrenches and cars are the same, driving a certain mileage, use for a period of time, all need to be maintained, torque wrenches in the use of up to a specified number of times or time, you need to carry out torque precision recalibration, the need for professional use of professional equipment by the professionals to adjust the calibration to prolong the life of torque wrenches must pay attention to: each time after the use of zero value, so as not to spring the spring to zero. Torque value to zero, so as to avoid long-term spring pressure, elastic fatigue, resulting in shortening the life of the torque wrench.
Torque wrench routine maintenance
If you reach the preset torque, and continue to apply pressure will cause damage to the workpiece.
Before setting the torque value, check whether the torque wrench is in LOCK or UNLOCK.
Torque wrench in the factory, has been calibrated and tested, the accuracy of different styles are different, any torque value point were ± 4%, ± 3%, ± 1%, which is a highly accurate measuring instrument, so only professionals can be maintained, do not soak in any liquid, otherwise it will affect its internal lubrication.