Rolling element assembly for adjustment of telescopic arm

A telescopic arm segment assembly, comprising a rolling element assembly comprising:

• two rolling elements, each comprising:
• a rolling element housing,
• two rollers that are rotatably fixed to one side of said rolling element housing, and
• two holes for aligning and subsequently fixing two threaded positioner bolts into corresponding mounting slits of a second segment of a telescopic arm, and
• a spring-loaded connecting element, connecting the two rolling elements, and comprising a set of concentrically arranged sliding arm segments comprising a first segment and a second segment,
• wherein the first segment comprises at least one runner rail with an upper cover and a lower termination arranged opposite to the upper cover,
• wherein the second segment comprises at least four mounting slits for fixing said rolling element assembly by said threaded positioner bolts while being clamped in said runner rail, the relative positions of the positioner bolts in the mounting slits being determined by the clamping action of the spring-loaded connecting element, and
• wherein the spring-loaded connecting element connects the two rolling elements such that the four rollers are clamped between the upper cover and lower termination of the at least one runner rail.