The needle is one of the smallest parts of the machine but is probably the most important. It is the source of the perfect stitch and also the most aggravation. The use of the correct type and size of needle is most important in proper operation of a sewing machine. Improper needles will cause a machine to produce poor stitching and may damage the material, or the machine might not sew at all. Using the wrong needle can also damage the machine. Figure 6-73 shows the parts of a needle. Without getting into the advanced aspects of needle technology, there are a few simple things for the rigger to know.

  1. There are three types of points—round, diamond, and twist. Round is used for cloth as it separates the fibers of the cloth as it passes through. The diamond is used for leather as it cuts the material.

  2. Each type of needle has a number to identify its size. A typical description would be “16 x 95, size 20”. The 16 is the size or diameter of the shank. The 95 is the length and also describes the type of point. Odd numbers denote round points and even, diamond points. The size 20 is the diameter of the shaft.

  3. The rigger should always follow the instructions in the operator’s manual for the proper needle, installation, and threading.

 ©AvStop Online Magazine                                                                                                                                                       Contact Us              Return To Books

AvStop Aviation News and Resource Online Magazine

↑ Grab this Headline Animator