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4. ADDITIONAL INFORMATION AND PRECAUTIONS
(1) Thread tension
1) Strength of tension spring
Part No.
11550100
11550209
13137807
13138508
13138805
B3121804000
Color
Purple
Green
Red
Yellow
Blue
Gray
Natural length
(mm)
19.5 mm
19.5 mm
19.5 mm
17.8 mm
17.3 mm
13.8 mm
Operating
length (mm)
11.5 mm
11.5 mm
11.5 mm
9.8 mm
9.3 mm
5.8 mm
Weight required to compress
spring to working length
8.92±0.49N (910 ± 50 g)
6.27±0.49N (640 ± 50 g)
4.21±0.49N (430 ± 50 g)
3.14±0.34N (320 ± 35 g)
1.47±0.20N (150 ± 20 g)
1.47±0.20N (150 ± 20 g)
Where to use
Model
Needle thread Double-chainstitch
needle thread
Upper looper
thread
Lower looper
thread
MO-6 04S(R) series Red – Yellow Blue
MO-6 05S series Yellow – Blue Yellow
MO-6 12S series Red Yellow – Yellow Blue
MO-6 14S(R) series Red Yellow – Blue Yellow
MO-6 16S(R)- - (4 or lower) Red Yellow Yellow Blue
MO-6 16S(R)- -50 Red Red Blue Yellow
MO-6 16S(R)- -60H Green Green Blue Yellow
MO-6 43S(R) series Red Red Yellow Blue Yellow
MO-6 45S series – Red Red – –
MO-6903G-0N6-3D1 Blue – – Blue
MO-6904G(J)-0F6-700 Purple – Yellow Red
MO-6905G-0M6-7 0 Yellow – Yellow Purple
MO-6914G(J)-CH6-700 Red Yellow Yellow Red
MO-6916G(J)-F 6-700 Purple Green Yellow Red
Nos.engraved on
upper looper
*1188 81
1199 92
1217 62
*1217 60
120148
123835
123837
123836
123835
Model
6 04S(R) series
6 16S(R) series
6 14S(R) series
6903G-0N6-3D1
6904G(J)-0F6-700
6905G-0M6-7 0
6914G(J)-CH6-700
6916G(J)-F 6-700
Needle No.
(kind)
#9 #11 #14
#14 #16 #18
#21
#16 (DOx5)
#21 (DOx5)
#24 (DCx1)
#18 (DOx5)
#21 (DOx5)
(2) Upper looper
Use a proper upper looper in accordance with the needle No. When ordering, refer to the Parts List. The
numbers shown in frame in the table below are engraved markers. In addition, the letters in ( )
parentheses are the kinds of the needles.
Parts Nos. with an asterisk * are factory-installed on the standard machine heads at the time of delivery.
2) Springs used for each model.
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