Inner Rotary Hook Tension Adjustment - Brother NV4000D Service Manual

Adjustment

Inner rotary hook tension adjustment

1. Set a bobbin (wound with Schappe Spun Sewing Thread #60) to the inner rotary hook, and thread the needle.
2. Pull the thread with a tension gauge, and adjust the tension to 0.10 to 0.12N (10 to 12g) using the spring adjusting
screw.
3. Apply a small amount of screw lock agent to the spring adjusting screw.
0.10-0.12N (10-12g)
Schappe spun sewing thread #60
Spring adjusting screw
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