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SKF profile rail LLTHR D4

For mounting from below

The SKF profile rail LLTHR D4 is provided with blind holes by default. These holes enable you to mount the LLTHR D4 from below.The X-arrangement allows the carriages to run very smooth because it decreases the amount of friction between carriage and rail. The key feature of this X-arrangement is that there are only two points of contact in an angle of 45º between rail and carriage. The LLTHR D4 is available in sizes between 15 and 45 mm and in different lengths. There are three different accuracy classes available for each size.

If you are unsure which size or implementation is the most appropriate for you, the differences are written below. If you are still in doubt you can always contact us on +31 (0)85 – 0661258.

Accuracy classes

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.
SKF profile rail LLTHR D4

From: €25,64
Available within 72 hours
(This may differ by variant)


CAD LLTHR D4 profile rail
ImplementationWidth (W)Distance between the mounting holes (F)Height (h1)
LLTHR 15 D415 mm60 mm14 mm
LLTHR 20 D420 mm60 mm18 mm
LLTHR 25 D423 mm60 mm22 mm
LLTHR 30 D428 mm80 mm26 mm
LLTHR 35 D434 mm80 mm29 mm
LLTHR 45 D445 mm105 mm38 mm
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SKF is the worldwide leader in the field of bearing technology. This also includes the profile rails and profile rail carriages that SKF offers. SKF has been on the top of the mountain for years thanks to the exceptional quality of their bearings and profile rail guides. This quality and the maintenance friendly character can be found in the entire range of SKF. With the purchase of a SKF bearing you are sure to have bought top quality.