Motion

Most industrial applications can be reduced to one of five classes of motion:

1. Angular
2. Axial
3. Offset
4. Radial
5. Random

1. Angular Motion:

Motion that occurs when one end of a hose assembly is deflected in a simple bend with the ends not remaining parallel. Angular motion may be incorporated in an installation to accommodate misalignment and vibration only, but must not be used to accommodate expansion that would result in unloading the braid. (click here to refer to our Angular Offset Calculator)

2. Axial Motion:

This type of motion occurs when one end of a hose assembly is deflected along its longitudinal axis. Axial motion is applicable to annular corrugated, unbraided flexible hose only. Neither helical hose nor braided hose should be used in axial motion applications.

3. Offset Motion:

Motion that occurs when one end of the hose assembly is deflected in a plane perpendicular to the longitudinal axis with the end remaining parallel. Offset is measured in inches of displacement of the free end centerline from the fixed end center line. In offset motion applications, the offset should never be greater than one-fourth (25%) if the minimum center line bend radius.

4. Radial Motion:

This type of motion occurs when the  line of a hose assembly is bent in a circular arc. In  applications, radial motion is most commonly  in travelling loops.

5. Random Motion:

Non-predictable motion that occurs manual handling of a hose assembly. Loading and hose would generally fall into this category. Abusive handling of hose is an important factor to consider in applications involving random motions. The use of an interlocked (RT-6 or RT-8) guard over the corrugated hose is recommended to protect the hose assembly from rough handling and “overbending” adjacent to the end fittings.