Can trapezoidal lead screw calculate its life?

Because the trapezoidal lead screw supports the load with the sliding surface during operation, it will generate friction and heat, and the sliding surface will also wear in this process. The PV curve defines the safe operating limits of load and speed. When the load increases, the speed must be reduced to prevent overheating and wear; Or conversely, it is the same from Dallas to the audience. When the load is small, the screw can reach a high speed, while when the load is large, the screw needs to run slowly. It should be noted that the linear speed of the screw can be improved by increasing the lead of the screw without increasing the rotational speed. This method can prolong the service life of the lead screw.

There is no reliable closed-form solution to calculate the service life of lead screw, because friction and wear may be nonlinear. A single wear coefficient is usually not enough to predict the performance of the lead screw assembly throughout its life cycle. Life estimation under controlled operating conditions is carried out through case studies. When the combination of load, speed and duty ratio exceeds a certain limit, the fault is foreseeable and will happen soon. For recommended applications with a design load greater than 500 RPM, check the lead screw supplier and the application engineering department. They can calculate the pressure velocity (PV) coefficient, which is a key design factor for proper size, and choose to use polymer nut and screw assemblies.