Drag chain cable than the general cable is soft, but not the softer the better, its insulation is a strong mechanical fatigue strength, so there is a certain hardness; And some flexible wire in addition to thin conductor, its insulation is also very soft, small radius installation wiring and low frequency bending is no problem, but mechanical bending life and special drag chain cable than the gap is still very big.
Look at the conductor, drag chain cable conductor diameter is generally 0.1mm(vernier caliper measure),0.08mm and 0.05mm; In order to ensure the stability of the physical and electrical properties of the conductor, the general use of multi-brushed 4N conductor, conductor bright and bright, good toughness; Low resistivity, long - term wire under rated load without heating;
Look at the insulation, very high concentricity, uniform insulation thickness; Insulation resistance to adhesion, high strength; Good toughness;
The safest and most direct way to do this is to use a high-speed bending test using an existing coordinate platform or linkage bending device.
Some tow chain cables also have some special requirements, which can be identified by looking at the material:
1. Tensile requirements: add nylon or DuPont Kevlar (commonly known as bulletproof wire, strength is several times of steel wire);
2. Wear-resistant and oil-resistant, wear-resistant skin is generally made of polyether polyurethane, which can be quickly identified by people who understand chemical industry; Toughness is very high, can be compared with the common imitation skin skin;

3. Versatility: the bending resistance of drag chain cable is much higher than that of ordinary cable.