Because of the current global commerce, it is not very difficult to find high-strength materials. However, in order to improve the strength of a part, heat treatment and surface treatment are also necessary. It is also very important to hope that the strength of the parts will reach more than 1000MPa without disorder, and the average strength of the materials is also very high. At present, in China, heat treatment and surface treatment are required. It is difficult for enterprises to achieve the strength of the internal parts of hydraulic square-drive wrench more than 1000MPa, even if it can be achieved individually, it is also difficult to achieve the non-chaotic batch. We also need to learn more from similar products abroad, invest more manpower and capital in a long period of time, and try and experiment in material and heat treatment. The following small knitting will take you to understand the hydraulic wrench bar!
Generally, there are several specifications, such as M36, M42, M48. If you don't say how big the nut is, it's the opposite side of the matching barrel of the metric bolt nut pair. M36 is 55 on the hexagonal opposite side of the nut, M42 is 65, M48 is 75. If the span of bolt specification is too large and the span of torque is too large, two types of wrenches must be selected to pre-tighten these bolts. The specifications of bolts and the strength grade of bolts are the most critical parameters for the selection of hydraulic torque wrenches. Different bolts and different torques make different bolt strength grades and different torques. The same bolt strength grades and different working conditions have different torques. The bolt torques used in rolling mills and chemical equipment are different, general. The design drawings give the magnitude of the torque.