The 134-35 KK SD1 needle (needle system 134-35 KK) has a round point with small triangular cutting edge for working leather, synthetic leather and other coated materials – never for woven fabric, since the cutting action would sever the weave threads. The KK version has a short shank. It is used in industrial sewing machines for leather and synthetic-leather work, where the cutting point produces a clean puncture. Suitable machine classes are found, among others, at Dürkopp Adler (classes 284, 291, 292, 294) and Pfaff (classes 3587, 3590 Vario, 3590 VARIO-6/…, 3590-51/12070 (portal)).
The available needle sizes are used, among others, for medium-weight leather for everyday leather goods and saddlery work. As sewing thread, a bonded polyester or nylon thread such as Amann Serabond, Amann Strongbond or Coats Dabond is usually recommended, in a thickness matching the needle size chosen. A cutting point is required here to create clean puncture channels in firm materials.
