To make the work of mechanical parts , in the structure design of the equipment and the whole process must ensure the strength and stiffness of the part of the work to meet the requirements . In order to 1.5 ton Electric Chain Hoists improve the mechanical properties of the machine , you should note the following: avoid being too far away from the power point and anchor ; parts subject to vibration loads to avoid friction force transmission ; avoid considering only a single load transfer ; should not be ignored at work parts deformation force distribution affected ; under impact loading parts should be avoided just had great ; affected parts should avoid stress becomes too rough surface , as well as the residual tensile stress .