SKF profile rail carriage LLTHC LU

Preload classes

To adjunct a profile rail guide to the specific demands of a given application, it is advisable to choose an appropriate preload. This will positively affect the operating behavior of the entire linear guidance system. Preload increases the stiffness of linear guides and thus reduces the deviation under load. You can choose between three different preload classes:

• T0 – Zero preload: For extremely smooth-running rail guide systems with low friction and low external influences. This preload class is only available in P5 and P3 accuracy calsses.
• T1 – Light preload: For precise rail guide systems with low external load and high requirements for overall stiffness
• T2 – Medium preload: For precise rail guide systems with high external load and high requirements for overall stiffness. Also recommended for single-rail systems.

Accuracy classes

The Accuracy class define the maximum permissible tolerance range of rail system in terms of height, width and parallelism. This choice determines the positioning accuracy of the system within the application. There are three different accuracy classes available for each carriage:

• P5 – standard: ± 100 µm height- and ± 40 µm width tolerance.
• P3 – medium: ± 40 µm height- and ± 20 µm width tolerance.
• P1 – heigh: ± 20 µm height- and ± 10 µm width tolerance.