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7. Adjusting the needle height and looper timing
(Unit : mm)
Classification
Description
Subclass
Needle height
Upper looper components
Lower looper
components
Double chain looper
components
1-needle
2-needle (left)
Safety stitch (right)
2-needle
(right)
Safety stitch
(left)
Height Projection
amount
Upper looper holder
Returning
amount
Radius Returning
amount
Radius
Height of pin Center to center
A
B
C
D
E
H
I
F
J
G
K
1-needle over-
lock machine MO-6804S
10.4-10.6
(10.8) 4.8-5.2
48.4
39.0
3.7-3.9
68.1
2-needle over-
lock machine
MO-6814S-2 H
(9.1)
(10.5)
5.4-5.7
50.3
MO-6814S-3 H
MO-6814S-4 H
11.8-12
(10.5)
(12)
51.3
4.1-4.3
MO-6814S-30P
10.4-10.6
(9.1)
(10.5)
50.3
3.7-3.9
Safety stitch
machine
MO-6816S-3 H
(7.6)
(10.8)
4.8-5.2
48.2
1.4-1.9
64.5
MO-6816S-50H
11.8-12
(9)
(12)
48.5
4.1-4.3
1.6-2.3
MO-6816S-60H
12.6-12.8
(9.8)
(12.7)
5-5.5
51.3
40.0
MO-6816S-30P
10.4-10.6
(7.6)
(10.8) 4.8-5.2
48.2
39.0
3.7-3.9
1.4-1.9
A
04
A
B
14
A
C
16
H
I
D
E
D
E
J
F
G
K
