Bearing apparatus, particularly rail bearing for a craneway

A rail bearing comprising

• a virtual main axis to be aligned vertically,
• a mounting element configured for mounting a rail,
• a base element configured for being attached to a supporting structure, and
• an adjustable compensation device extending between the mounting element and the base element along the virtual main axis and configured for orienting the mounting element with respect to the base element and for supporting the mounting element at the base element in direction of the virtual main axis,
• wherein the compensation device comprises a mechanical series connection of
• an articulated joint arrangement which defines a pivot point located on the main axis and which can be locked and unlocked, and
• a supporting column comprising an inner column and an outer column and a length along the virtual main axis which can be varied by screwing the inner column in the outer column,
• the mechanical series connection extending along the main axis,
• wherein the unlocked articulated joint arrangement allows the mounting element to pivot relative to the base element about any pivot axis which intersects the main axis at a right angle at the pivot point,
• wherein a screwed-in position of the inner column in the outer column of the supporting column is fixed by a rail mounted to the mounting element,
• wherein a smallest column diameter of the supporting column transverse to the main axis is at least about 100% of a maximum column height of the supporting column along the main axis,
• wherein the outer column is pot-shaped column and has an internal thread, and wherein the inner column has an external thread screwed into the internal thread,
• wherein the external thread engages in the internal thread over at least 3 thread turns in each length of the supporting column, and
• wherein the mounting element is supported at the base element exclusively via the mechanical series connection of the articulated joint arrangement and the supporting column.