Double-row and four-row miniature linear ball bearing and guideway assemblies are full-complement, preloaded linear locating bearings for unlimited stroke lengths. A unit comprises at least one carriage with a locating face and a guideway.

The units can support forces from all directions apart from the direction of motion and moments about all axes. The double-row units have two rows of rolling elements in four-point contact with the raceways. KUME..-C has four rows of rolling elements in two-point contact with the raceways that transmit forces at a contact angle of 45°.

The linear ball bearing and guideway assemblies are corrosion-resistant due to the steels used in the manufacture of the saddle plates and guideways.