“Axial Force Sensor” which is designed, developed and tested by the Research, Development & Design Center and the Precision Locknut Inspection Lab. It’s especially designed for precision locknut which is installed on the spindle. The function is measuring how much axial force object gain after tightening the locknut and applying the tightening torque on it. Besides that, the user can check whether the quality of the spindle is stable or not during installing, and also can analyze the axial force data at the same time. Currently, we provide three specifications of the axial force sensor. It can cooperate with up and down specific washers to measure the axial force of locknuts from M40 to M170. And the maximum axial force it can measure is up to 4000kgf. For sure, the international and domestic patents have been also applied.