Passfläche

Passfläche refers to a specific contact area or bearing surface between two machine elements. Its primary function is to ensure accurate relative positioning, load transfer, and controlled movement. The geometry and surface finish of a passfläche are critical for its performance. In precision engineering, achieving a high degree of accuracy and smoothness on a passfläche is paramount to minimize friction, wear, and play. Examples include the mating surfaces of sliding guideways on machine tools, the contact areas in bearings, or the critical surfaces in a precision jig. The term emphasizes the functional aspect of the surface – it's a surface *for passing* or transferring motion and load. Proper lubrication and maintenance are essential to preserve the integrity and function of a passfläche. Deviations from the intended geometry or surface quality can lead to reduced accuracy, increased wear, and eventual failure of the component or assembly. The concept is fundamental in mechanical design, where precise interfaces are necessary for reliable operation.