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2. Model classification according to the button size
Model
Button size classification
Outside diameter of applicable buttons (mm)
Sewing size (mm)
B u t t o n c l a m p j a w
Part No.
lever
Needle hole guide
Feed plate
3. Shape of buttons
Shape of buttons
Remarks
Length
Width
Thickness (mm)
Right
Left
Applicable buttons
1.8 –
3.5 mm
Thickness of button : 1.8 to 3.5 mm
LK-1903BN-311
For small-sized buttons
ø10 - ø15
0 - 3.5
0 - 3.5
2.2
Engraved mark
MAZ165070B0
MAZ165080B0
MAZ15501000
MAZ15502000
1.2 mm or more
Button without recess on the surface
Button of which edge is thin is likely not to be fed smoothly.
2
−
−
LK-1903BN-312
For medium-sized buttons
ø12 - ø18
0 - 4.5
0 - 4.5
2.7
Engraved mark
H
MAZ166070B0
H
MAZ166080B0
MAZ15601000
MAZ15602000
Non-applicable buttons
Less than 1.2 mm
J
J
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