Uploaded August 2019 | Updated September 2026, 3 days ago
Dirty, damaged or out of adjustment bobbin cases can be cleaned and adjust. Two tiny screws and a tension spring. Lint, smudge, and oil can build up behind that spring and cause tension problems. Do it yourself. 1 OUNCE TENSION ON BOBBIN SPRING
Models using this case are 66, 99, 401A, 403A, 404, 500A, 503A, Singer 400 models, Singer 500 models, and many others
00:00 INTRO
04:30 BOBBIN TENSION THEORY
07:00 DISASSEMBLE
12:00 CLEAN
15:10 ASSEMBLE
21:00 ADJUST
TENSOMETER: singer-featherweight.com/collections/accessories/products/bobbin-tension-meter?variant=19186920963
MUSIC: BENSOUND " ENERGY"
Dirty, damaged or out of adjustment bobbin cases can be cleaned and adjust. Two tiny screws and a tension spring. Lint, smudge, and oil can build up behind that spring and cause tension problems. Do it yourself. 1 OUNCE TENSION ON BOBBIN SPRING
Models using this case are 66, 99, 401A, 403A, 404, 500A, 503A, Singer 400 models, Singer 500 models, and many others
00:00 INTRO
04:30 BOBBIN TENSION THEORY
07:00 DISASSEMBLE
12:00 CLEAN
15:10 ASSEMBLE
21:00 ADJUST
TENSOMETER: singer-featherweight.com/collections/accessories/products/bobbin-tension-meter?variant=19186920963
MUSIC: BENSOUND " ENERGY"










