The fatigue flexing test is applied to assess the resistance of soling materials such a PU, thermoplastic rubber, rubber, PVC, and other solings to crack formation and growth under changing flexural stress. The testing machine is supplied with three workstations having each one a fixed and moving test piece clamp all of them presented horizontally for operator ease and comfort. The test specimens are guided in such a way that on one side it can be bent an angle of 90° about a mandrel with a radius of 15 mm. at 140 flexes per minute. The design of the flexing device ensures that in bent condition, the plane formed in a stretch condition by the two clamped faces over the outline perimeter of the flexing roller will not change its length, so that the stretch of the test specimen depends only on the roller diameter and the thickness of the test specimen. The fatigue tester is equipped with a switch that enables the operator to stop the piece clamp in two different positions, in stretched position to attach specimens in such a way that the clamped areas form a plane with the outline perimeter of the flexing roller or at maximum flexing angle to measure the crack length. They can test soles from 35 to 44 or even higher without problems.
The model EL-13F with cold chamber allows to perform tests below ambient temperature till -25°C (standard) or -30°C (on request).
All moving parts requiring access are protected by a fully interlocked safety guard ensuring that the machine is conforms to the European latest safety regulations.
For further information please download the technical sheet.