Compared to ball screws, lead screws are less susceptible to dirt. However, the accumulation of dirt on the screw should of course be avoided. If dirt works its way into the nut, wear usually increases. In combination with lubrication, this can lead to the dirt particles combining with the lubricant and creating an “abrasive paste”.
Ideally, the spindle should be completely protected with a bellows or another design measure.
For applications where this is not possible for reasons of space or cost, the use of a wiper for trapezoidal threaded spindles is a conceivable alternative.
junaspin wiper for trapezoidal threaded spindles
Cast metal wiper with rubber wiper lip
Material:
Wiper made of NBR70 (+-5 Shore)
Other sealing materials (Cr, FKM, EPDM, VMQ etc.) on request
Housing made of steel
Other housing materials (aluminum, V2A, V4A) on request
junaspin will be happy to help you select a wiper. Based on our experience, we can also assess whether the use of a dry-running system is possible in your application.
