Roof Rail

Roof rail: Automatic or manual tolerance compensation

Tolerance compensation with optimized force distribution

WITOL tolerance compensation systems offer advantages in the fastening of large and tolerance affected components. The roof rails must be firmly connected to the roof structure of the car body at several screw points. By using WITOLs, the component is fastened tightly and without tension.

Fastening solutions from WITOL are used for laser-welded roofs as well as for roofs with a roof channel. The cavity between the roof cladding and the supporting structure is precisely compensated by WITOL so that the railing is fixed and load-bearing.

WITOL roof rail fixation

Two systems for roof rail mounting

Single-stage assembly

The WITOLs are inserted at the joints of the roof cladding. During assembly, the screwing process activates the WITOL and automatically compensates for the tolerances between the inner roof structure and the outer roof cladding.

Two-stage assembly

Unlike single-stage assembly, the compensation of tolerances is activated by a special tool. This results in a precise sleeve that is compatible with the bolt / nut system of the component. The railing is then conventionally screwed in place by means of a stud bolt or screw.


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Roof Rail Assembly

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Learn more about Intelligent fastening solutions for roof rail assembly.


Mockup Whitepaper Roof Rail

Application examples

WITOL Surface