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1) Lift of the needle bar
2) Clearance between the needle and the blade point of the hook
3) Position of the needle and the blade point of the hook
Condition
o The needle bar ascends from the lowest dead point of its stroke.
o Fed amount (stitch length)
: 2.5mm (For G type, it should be set at 3.5mm)
(For F type, it should be set at 2mm)
(2) Timing between the needle and the hook
Standard Adjustment
0 to 0.05mm
Blade point of the hook
Needle guard of the hook
0.03 to 0.1mm
o LH-4128 o LH-4168-7
LH-4128-7 LH-4188-7
Application A (mm) B (mm)
S.G.F 2.2 1.2
B
Blade point
Center of the needle aligns with
the blade point of the hook.
Lift of the needle bar when the lower maker
line on the needle bar meets the bottom and
of the needle bar frame : A=2.2mm
Lift of the needle bar from the lowest
dead point of its stroke
A
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