Adjustment Of Inner Rotary Hook (Lower Thread) Tension - Brother NV-10A Service Manual

Adjustment

Adjustment of Inner rotary hook (lower thread) tension

1. Set a bobbin (wound with Schappe Spun Sewing Thread thread #60) in the inner rotary hook.
2. Pull the thread with a tension gauge, and adjust the spring adjusting screw so that it is 0.1- 0.12 N (10 - 12 g).
3. Apply a small amout of screw lock agent to the spring adjusting screw.
XA9153001 Tension gauge 30 (0.3 N)
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