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Standard Adjustment
6) Installing position of the moving anf counter knives (For H and G types)
Position of the moving knife : The distance from the end face on the throat plate side to the top end of the
moving knife is 18.9 mm when the moving knife travels to the extreme front.
Position of the counter knife : Clearance A provided between the flat work section of the needle hole guide
and the counter knife is :
H type : 0.8 to 1.0 mm
G type : 1.4 to 1.6 mm
And, the clearance provided between work section B of the throat plate and the counter knife is 0.3 to 0.5
mm.
7) Height of the moving and counter knives (For H and G types)
Height of the moving knife : Height of the moving knife is set by the adjusting washer.
Adjust the height when thread is changed and sharpness of the knife is deteriorated.
Height of the counter knife : Level difference A between the counter knife and the needle hole guide is :
H type : 0.25 to 0.35 mm
G type : 0.50 to 0.60 mm
Top end of moving knife
Adjusting
washer
0.3 to 0.5 mm
Throat plate
Thread trimmer lever
(small)
18.9 mm
A
B
Counter knife
Needle hole
guide
1
2
1
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