Sliding screw drives can be used in temperature ranges from -90 degrees to + 350 degrees. The selection of the right materials is of course crucial.
In addition to the temperature resistance of the material, the lubricant must also be suitable for the temperatures that occur.
For the function it is just as important to consider the temperature expansion coefficient as well as the temperature resistance. If, for example, the spindle and nut have completely different values, the nut may jam in the application. This can often be observed when combining a plastic nut with a steel spindle. The manufacture of a threaded nut with increased axial play could help here.
In addition to the ambient temperatures, the heat generated by friction must also be taken into account.
For applications in extreme temperatures, the strength values of the materials must also be taken into account. With plastics in particular, the permissible load on a threaded nut drops significantly with increasing temperature.
At temperatures well below zero degrees, in addition to the points mentioned above, an increased breakaway torque due to “freezing” of the nut on the spindle must be taken into account. Suitable lubrication is absolutely recommended here.
junaspin is happy to support you in the selection and design of your screw drive. We are happy to recommend appropriate materials for the temperature ranges occurring in your application. In addition to the calculation, we can also incorporate experience from “real applications” and tests.