Special-purpose needles

These needles are used only with front-to-back threading machines with zigzag features. Make sure your throat-plate needle hole is wide enough to accommodate needle's width, and zigzag width function is set at zero to prevent sideways movement.

Hemstitch (wing) needle
Uses: Hemstitching or heirloom embroidery on linen and batiste.
Configuration: Has fins on sides of shank to create holes as you sew.
Troubleshooting: Stitch is more effective when needle returns to same needle hole more than once. If needle pushes fabric into needle hole, put stabilizer under fabric.

Twin (double) needle
Uses: Topstitching, pin tucking, and decorative stitching.
Configuration: Two needles on single shaft produce two rows of stitches. Measurement between needles ranges from 1.6mm to 6mm, and needles come with universal, stretch, embroidery, denim, and Metallica points.
Troubleshooting: Be sure throat plate allows for distance between needles.

Triple needle
Uses: Same uses as for double needle.
Configuration: Cross bar on single shaft connects three needles to sew three stitching rows. Comes with universal point in 2.5mm and 3mm widths.
Troubleshooting: Same as for double needle.

Spring needle
Uses: Free-motion stitching with dropped feed dogs.
Configuration: Has wire spring above point to prevent fabrics from riding up onto needle, eliminating need for presser foot.
Troubleshooting: Before using, practice free-motion stitching with heavy regular needle, paper, and dropped feed dogs. Don't pull paper/fabric; instead gently guide it through stitching. Wear safety glasses for free-motion work, since needles often break.

Related article:
Machine-Needle Know-How

Photos: Sloan Howard; drawings: Karen Meyer