1.2

Product Overview Features of the MONORAIL system

O-geometry Large internal spacings of the load carrying surfaces are implemented with what is called an O-arrangement of the guideway. In conjunction with roller tracks that are offset by 90°, this achieves a uniform and high absorption of forces from all direc-tions and provides high moment rigidity. Roller with a convex ‘barrel’ profile Linear guideways have a significant influence on the overall rigidity of a machine tool. With roller MONORAIL MR, the demonstrably high degree of rigidity is achie- ved by using rollers, with a convex profile, as rolling elements and the optimized cross-sections of the carriage and the rail.Compared with a ball guide, a roller guide has a flat and much larger contact area, which results in a far greater load carrying capacity.The barrel shape enables the contact surface to adjust to the particular load and provides a smooth transition from the load zone to the unloaded recirculation area.This results in a significant reduction in wear since it avoids edge loading coupled with minimum roller friction. Ball with 2-point contact The MONORAIL BM is a modern, 4-row ball guide with O-geometry. Even when preloaded and under load, a ball that is in the load zone only contacts the track contour of the rail and the carriage at two diametrically opposed points. Compared to a guide with 4-point contact, the precision fit of the tracks to the ball provides significantly greater load carrying capacity. Friction is minimised as the balls roll more or less without any differential slip, which results in smooth, even running. Trapezoidal rail profile The trapezoidal rail profile meant it was possible to optimize the carriage cross sections and the connection of the base surface of the rail to the sub-structure to achieve the highest possible rigidity. This rail profile enables easy servicing since additional wipers can be replaced directly on the rail without any complicated remo-val of the carriage.
4