Sewing Machine Handwheel Crank Handle
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Non-destructive handwheel crank mod for heavy duty Singer sewing machine
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Some models of sewing machines have hand cranks on their handwheels and I wanted one
The crescent piece is hose-clamped to the plastic handwheel (can be removed with fingers firmly pulling). A 1/4-20 thread self-screws into the crescent and the handle/knob of your choice goes on the end. Washers and nuts to secure as needed
The whole operation is non-destructive to the plastic handwheel. You can put a rubber band or some bluetape around the handwheel for extra grip and an extra layer of protection
The "Handle Small" is my preferred, but my beta testers preferred Handle Big. The knob versions stick out less from the machine (less plastic spinning during pedal operation), but have less to grip onto during hand operation
I recommend that you attach this such that the tension arm at the highest point when the Handle/Knob is at the lowest point of its travel. This ergonomically finishes the stitch with your hand resting on the handle/knob and the tension arm at the most relaxed natural position