There are two types: the helical coil rewind angle method and the spring back method.
<Helical Coil Return Angle Method> - Wrap the specimen around the mandrel 5 times at the specified rotation speed, mark it, and then remove the weight. - Slowly release the tension and read the scale of the return angle at the end of the 5th turn to evaluate softness. <Reference Standards> C3216-3, IEC-60851-3 <Spring Back Method> - Insert one end of the specimen into the stop hole to be wrapped around the mandrel, and hang a weight from the other end. - Wrap the specimen around the mandrel 3 times at a rotation speed of 5 to 10 times per minute, mark it, and then remove the weight. - Slowly return the specimen wrapped around the mandrel and read the scale at the position where the mark stopped to evaluate softness. <Reference Standards> JIS-(C3003), C3216-3 (Appendix JA Alternative Test Method), IEC-60851-3 [Regarding Catalog Download] Please request the catalog from the related links below or by contacting us. *For products without individual catalogs, please request the comprehensive catalog.
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【Helical Coil Unwinding Angle Method】 ■Sample: 1 m, conductor diameter φ0.08 ～ φ1.6 mm ■Mandrel rotation speed: 1 ～ 3 rpm (manual or electric) ■Mandrel diameter: φ5 mm, φ7 mm, φ10 mm, φ12.5 mm, φ19 mm, φ25 mm, φ37.5 mm, φ50 mm ■Load: 0.25N, 0.5N, 1N, 2N, 4N, 8N, 12N, 15N ■Scale: 0 ～ 72 ■Dimensions & Weight: Approximately W128 × D190 × H184 mm; approximately 4.3 kg (manual) *The spring back method has different specifications. Please refer to the website or catalog.
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