Singer 337 manual Bobbin Thread Tension Too loose

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_ _:_BOBBINSTRAIGHTTHREADSTITCHINGTENSION __ _._L

Bobbin thread tension	too tight--	Bobbin	thread	tension	too loose--
correct by turning screw counterclock-		correct by	turning	screw	clockwise.
wise.

A perfectly locked straight stitch results with upper and lower tensions balanced so that needle and bobbin threads are drawn equally into fabric.

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Contents E S I N G F R C O M P a N Y 865 Singer Congratulations Principal Parts of Machine HOW to Wind the Bobbin Tighten stop-motion screw, as shown above To Replace the Bobbin Shown HOW to Thread the MachineStitch Length ChartThis Loosen thumb nut by turning it to the left Stitch Controls1234 Pull end of bobbin thread up through throat plate Ii. i Iti Pressure AdjustmentsNeedle Thread Tension Straight Stitching Lower number Higher numberBobbin Thread Tension Too loose Stitch Length Adjustment for ZIG-ZAG Satin Stitching Satin Stitching Adjustment For ZIG-ZAGKnit Fabric Seams ZIG-ZAG ApplicationsDarts in Interfacing Application of Elastic. Elastic must be MendingApplique Buttonholes Stitch Length Above Stitch Width 2 Buttonholes Contd Darning Straight Stitch Presser RufflerSpecial Purpose Foot When stored HOW to Take Care of the MachineTo remove the throat plate To replace the throat plate Positioning Stud Singer Center Page To Oil the Machine Contd Electrical Information To Change Bulb To all whom it may concern Singer