−
2
−
Standard Adjustment
Needle
1.6 to 1.8 mm
0.01 to 0.04 mm
0 to 0.02 mm
2. STANDARD ADJUSTMENT
(1) Height of the needle bar
Adjust the height of the needle bar so that the distance from the top surface of the throat plate to the lower
end face of the needle bar is 11.9 mm (standard) or 11.4 mm (K) when the needle bar is in the lowest dead
point.
(2) Needle-to-hook timing
1) Blade point of the hook is aligned with the center of the needle when the needle bar goes up by 2.3 mm
(standard) or by 2.8 mm (K) from its lowest dead point.
At this time, the distance from the top end of the needle eyelet to the blade point of the hook is 1.6 to 1.8
mm (needle is in the central section of the hole in the throat plate).
2) The clearance provided between the needle and the blade point of the hook is 0.01 to 0.04 mm (needle
is rocked to the right of the hole in the throat plate).
3) Adjustment value of the needle guard is 0 to 0.02 mm (needle is in the central section of the hole in the
throat plate).
Blade point
of hook
Setscrew in the needle
bar connection
Needle guard
1
