White 431 Stitch Length Knob
thingiverse
This part replaces the stitch length assembly of a White 431 sewing machine. The original part failed due to zinc-pest, rendering the knob immobile and unable to rotate. It integrates the zinc cam with the knob. The part may require some minor adjustments but worked flawlessly on my first attempt... I printed it with approximately 0.3mm layer height. A lower layer height is likely even better. Perhaps it doesn't need any lubrication at all?
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