1. If it is necessary to straighten the trapezoidal screw, the best straightening method is to straighten it by hand. Put the trapezoidal lead screw directly on the U-shaped iron block, put the flat shovel that has been opened or rounded before directly on the most protruding position of the trapezoidal lead screw, beat it with a sledgehammer, align it with a dial indicator, and then repeat the process for many times to achieve the straightening effect.

Secondly, when the trapezoidal screw needs to be bent as a whole, Bian Xiao suggested that it can be straightened by a press. At the same time, the trapezoidal screw can be directly placed on two U-shaped iron blocks, and then the fixture with a ring can be placed on the trapezoidal screw. You can observe it with the naked eye and align it with a dial indicator.

Third, trapezoidal screws really need to be straightened. If there is overall or individual bending, or the bending size is different, you can choose to use manual straightening or press straightening according to the actual situation.