It is called FIXED to those systems or rolling cartridges, with capacity to absorb loads external AXIAL and RADIAL at the same time, with total absence of axial play.

For this condition, the system must form a compact and highly rigid “block”,and must be tightly tied to a casing by means of the existing screws in the cartridge flange. The expansion in the elements of the machines is a fact to which special attention must be paid since, if the elongation is not foreseen when designing the supports of the axis in question, serious operating problems may occur, including breakdowns considered “catastrophic”.