Sliding screw drives are less susceptible to dirt than ball screws. However, depending on the type of contamination and the frequency of adjustment, the contamination must be dealt with differently.
In the case of very fine dirt, such as cement dust, flour, textile fibers, etc., the use of dry-running systems has proven itself. By dispensing with lubricants, the sticking of soft particles and fibers on the spindle is avoided.
In the case of coarse dirt, such as metal shavings, wood shavings, earth and other coarse solids, the use of a scraper or a scraper brush can be useful. See also Wiper for trapezoidal screw drives .
If the dirt is very abrasive, such as diamond, granite or corundum particles, the screw drive should be covered. Bellows are ideal for this.
In some applications, a dirt-resistant drive could also be achieved by making appropriate lubrication grooves. Corresponding relubrication intervals were specified by the user. Regular lubrication “pushes” the dirt out of the nut. The dirt is “embedded” in the lubricant and therefore has a smaller negative impact on the service life.
In all cases it should of course be noted that the dirt has an influence on the service life.
junaspin will be happy to help you choose a wiper or bellows. We can also judge on the basis of our experience whether the use of a dry-running system is possible in your application.