Baby Lock Mid-Line Machines Technical Training Manual page 48

Adjustment
[Standard]
The overlap between the spring plate of the inner rotary hook bracket assy and the
protrusion A of the inner rotary hook assy in the front/back direction should be 1.7 ±0.1
mm (1.6 to 1.8 mm).
[Adjustment]
1. Remove the needle plate B assy.
2. Set the inner rotary hook assy into the outer rotary hook assy.
3. Loosen the screw of the inner rotary hook bracket assy.
4. Move the position of the inner rotary hook bracket assy (forward and back), and adjust the overlap between the
spring plate of the inner rotary hook bracket assy and the protrusion A of the inner rotary hook assy.
5. Tighten the screw of the inner rotary hook bracket assy to secure the inner rotary hook bracket assy to the stopper
plate block assy.
Protrusion A
Inner rotary hook bracket position
Inner rotary hook bracket assy
Inner rotary hook assy
1.7 ±0.1 mm (1.6 - 1.8 mm)
Spring plate
4 - 30
45
Screw, Bind M3X8
Inner rotary hook assy
Needle plate B assy
Inner rotary hook
bracket assy
Screw