The 332 D needle (needle system 332) has a triangular point for working leather, synthetic leather and other coated materials – never for woven fabric, since the cutting action would sever the weave threads. 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 Juki (classes LK, LU, LUH, LK - 1850 G), Pfaff (classes 3125, 3126, 3135, 3136) and Singer (classes 11263, 11, 16, 22).
Thinner needle sizes are used, among others, for thinner to medium-weight leather, and the thicker versions 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.
