This is the pattern cam mechanism and stitch-width control in the Singer 403a. The cam is the black disk at right. A cam follower traces the pattern on... | By Dr. Dave's
Decorative Stitches: How They Work - Aspenleiter Vacuum
Fanciful ways of fancy stitches – Vintage Sewing Machines
Replacing the Cam Gear on a Bernina 730 Record — Ashley and the Noisemakers
This is the pattern cam mechanism and stitch-width control in the Singer 403a. The cam is the black disk at right. A cam follower traces the pattern on... | By Dr. Dave's
Cam and Follower: Types, Working Principle, Applications & Advantages
Fanciful ways of fancy stitches – Vintage Sewing Machines
China SA6673001 Zigzag Cam manufacturers and factory - Zhejiang suote sewing machine mechanism co.,ltd.