Pfaff 28 Owner's Manual - Page 12

If the needles are too thick for the material to be sewn, ugly needle marks will show in the material. With long, thin needles, vibration of the needle can hardly be avoided. Therefore, two needle systems comprising needles of different lengths are used with PFAFF 28 machines, depending on the type of work. For machines intended far fine stitching in lightweight leather, short needles with round shank, System 690, are used. This short needle does not vibroe and can be twisted somewhat to obtain perfect loops with any grade of thread. System 690 needles are available with different needle points as follows: System 690 R is a needle with round point used for sewing fabrics. System 690 P is a needle with wedge point, the cutting edge of the needle running in the direction of the needle eye. Therefore, the needle mark in the material is transverse. This needle is chiefly used for ornamental stitching in fine leather. System 690 LL is a needle with reverse-twist point, the cutting edge of the needle running diagonal from left to right (looking on the needle point). Its needle mark in thr material is oblique. This needle is used for sewing hard leather with short stitches. The sub-classes used for sewing thicker leather are fitted with the longer flat-shank needle, System 80& Also this needle can be had with needle points R, P and LL. Variety PFAFF 28-8 A.B PFAFF 28-9 A B PFAFF 28 10 C D PFAF 2815 BC EFAFF 28-17 B PFAFF 28-17 C PFAFF 28-18 B PFAFF 28-18 C PFAFF 28-33 AB PFAFF 28-133AB PFAFF 28-155 B PFAFF 28-155C PFAFF 28-190A/B PFAFF 28-192 PFAFF 28-199 Table of Needle Sizes Needles Systam 690 690 805 805 805 805 805 805 690 190 805 805 690 805 805 Length of Needle System 690: 1;" long 805: 1 ," long 190: 1.929" long Needle Size 80-110 80-110 120-180 90-140 80-110 110-160 80-110 110-160 80-110 90-110 90-110 110-140 80-110 90-140 120-180 The proper needle size should be selected very carefully from the follow ing tajle so as to match the thread and mcgterial used. 9