弯曲试验机专门试验插头引出线及电线之耐折强度。试法是将试样固定在夹具上，并加一定荷重，试验时夹具左右摆动，经一定次数后检视其断线率，或至全部断线无法通电时查看其总计摆动次数。弯曲试验机能自动计数，试样弯折至断线无法通电时，并能自动停止操作。
This tester is specialized in testing the flexing endurance between power cord and blades，and is capable of testing the flexibility resistance of the cord itself。Samples are to be secured in the jaws of the flexing apparatus，and cord is to hang vertically with the weight tied on the lower end of it。The rotating jaws are to be adjusted to rotate to the angle of 90 degree to each side of the centered position。After a certain cycles is reached or until specimen is broken，detect the breakage ratio or calcuate the total cycles。This machine is able to auto-count and auto-stop during specimen broken。