Rolling guide

A rolling guide is a technical guide in which rolling elements are used to reduce the friction between the various components or guide elements. The "mother" of the roller guide is the roller bearing , which served as a model for the first roller guides.

Rolling guides are generally understood to mean all types of linear guides such. B. shaft guides or rail guides in which rolling elements are used that are optionally (depending on the variant of the guide) held by a rolling element cage (ball or roller chain ).

A distinction can be made between profile rail guides , telescopic rail guides and cage rail guides for rolling rail guides .

DIN designation: linear rolling bearings

In the list of DIN standards, the DIN 636 and DIN 644 standards include linear rolling bearings, including, according to the DIN definition, not only linear ball bearings , but also

1. Profile rail ball guides = profile rail guides as well as
2. Linear guides without rolling element circulation = count cage rail guides .

However, the designation according to DIN does not correspond to the designations customary on the market. Customary is z. B. the designation linear ball bearing, in older language also called ball bushing.

Technical parameters of roller guides

Dimensions and tolerances such as B. the shape and positional accuracy of a guide, which are defined in the construction or assembly drawing and depend on various manufacturing and assembly parameters, play a significant role in terms of the accuracy and quality of a guide.

Other important parameters when designing a guide are its preload ( play (technology) ), static load rating C ₀ , dynamic load rating C, the actual loads and their load directions as well as the service life that can be calculated from these parameters , either in strokes, double strokes , kilometers or even hours can be expressed.