8
MC450e
Adjusting the Hook Timing
1. Remove the needle plate and bottom plate (refer to
page 2).
2. Remove the presser foot and the bobbin holder.
Attach a #11 blue tip needle.
3. Lower the needle bar to its lowest position by turning
the hand wheel toward you.
4. Raise the needle bar 3.25 to 3.55 mm up from the
lowest position.
5. Loosen the setscrews on the lower shaft gear.
Turn the lower shaft gear until the tip of the rotary
hook meets the right side of the needle, while holding
the hand wheel so the needle bar does not move.
6. Tighten the setscrews.
7. Attach the bobbin holder, needle plate and presser
foot. Replace the needle with the #11 needle.
8. Attach the bottom plate and needle plate.
The hook timing is an amount of ascending travel of the needle bar from its lowest position to
where the tip of the rotary hook meets the right side of the needle that should be 3.25 to 3.55 mm.
Needle plate
Bobbin holder
Tip of the rotary hook
#11 needle
3.25 to 3.55 mm
Lowest position
Setscrew
SetscrewLower shaft gear
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