The lifespan and lubrication method of trapezoidal screw. In trapezoidal lead screws, the larger the shaft diameter, the greater the load. The load capacity that screws with different shaft diameters can withstand can be found in the manufacturer's sample book, and the relevant parameters are dynamic rated load and static rated load. Static rated load refers to the rated load that the screw can withstand in a stationary state, but we cannot keep it stationary with the screw, so here, we basically only need to focus on the rated load of the heart. Then, the smaller the ratio of actual load to rated load, the longer the theoretical life of the screw.
In general, when lubricating trapezoidal lead screws, oil is often used. This is also a very common lubrication method for trapezoidal screws. This method mainly includes the smoothing of the oil pool and the dripping of oil, and the smoothing effect of these two smoothing methods is also very good. The smoothness of the oil pool is much better than that of the dripping method, mainly because this smoothness method has more demanding requirements, such as high speed, external heat transfer, and heavy load, and can also allow the trapezoidal screw to cool down quickly. The dripping smoothness method is more suitable for use at medium to low speeds and light loads.