The bend radius (r) is the radius of the arc through which a hose is bent the minimum bend radius is the tightest arc in which a hose is bent without kinking or otherwise damaging the hose. As rule-of-thumb the bend radius is a follows:

Bending a hose to a tight radius imposes stresses on the structure of the hose, which may cause a reduction in the performance or in extreme cases cause permanent damage to the hose.

The minimum bend radius that a hose will withstand depends upon many factors, including the wall thickness, the presence of a wire helix, the type of reinforcing material and the loss of performance that can be tolerated.

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