Sewing machine tension problems, cleaning hook and bobbin case area, and adjust bobbin tension.
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Sewing tension problems upper and lower thread tension explained.
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Handi Quilter M Class Bobbin Case Backlash Spring
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How to Rescue an Old Sewing Machine
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Re-assembling the shuttle hook mechanism on a front load 15 class sewing machine
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Juki DDL-555 Sewing Machine
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The Best Sewing Machine Money Can Buy!
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Help! My bobbin thread won't connect/ what happens in the bobbin when you have a timing issue?
7:11