Uploaded November 2019 | Updated September 2026, 2 days ago

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MODEL 353/354 APOLLO HOOK BRACKET
youtu.be/iaArQ58TVKE
MODEL 327k STYLE HOOK BRACKET
youtu.be/fq_1qRQFM_Y
HEEL GAP .012 - .014 INCH ( 0.3048 - 0.3556 MM )
STOP GAP .012 - .014 INCH ( 0.3048 - 0.3556 MM )
CORNER GAP .025 - .045 INCH ( 0.635 - 1.143 MM )
Tutorial for setting the thread clearance of the bobbin case Singer Model s 401A, 403A, 404, 500A, 503A, and other sewing machines.
How to adjust the clearance between the bobbin case and positioning bracket. Do it yourself. Easy to do. Close-up pictures and clear video instructions. Stitch Balance, puckered stitching, bunched up stitching, loud bobbin case, clicking, clacking.
00:00 INTRO
01:40 FEELER GAUGE
02:25 GAP THEORY
12:20 PREP FOR TESTING
14:00 SEE THE GAP
15:50 CLOSE-UP PIX
18:20 TEST THE GAP
25:00 ADJUSTING THE GAP
38: THREAD TEST METHOD

MUSIC: My Sad Old Heart by the 126ers