Overlock Sewing Machine
K series
EF3-K11
Cylinder Bed Single Needle
Overlock Sewing Machine
EF3-K21
Cylinder Bed Twin Needle
Overlock Sewing Machine
2000.7
EF3-K11, K21 1/7
Specifications
Sub-class
Applications
Stitch width
Sub-class
Applications
Stitch width
EF3-K11 - / /
Sub −class Stitch width Device
Stitch type No. of
−3
--4
02
−5
−3
04
−4
−5
−3
12
−4
−5
52 −4
Blind
hemming
Elastic tape
attaching
needles
1 3
1 3 −
1 3 −
1 2 − 4 0.8– 3.7 0.8 – 1.8
threads
EF3-K21 - / /
Sub −class Stitch width Device
No. of
Needle
gauge
(mm)
−
(mm)
3
4
5
3
4
5
3
4
5
Max. stitch
length
(mm)
0.8– 3.7 0.8 – 1.8
0.8– 3.7 0.8 – 1.8
0.8– 3.7 0.8 – 1.8
Differential
ratio
03
04
92
-5
-6
-7
-5
-6
-7
-4
-5
Versatile
sewing
Stitch type No. of
needles
2 4 2
2 4 2
2 4 2
No. of
threads
Needle
gauge
(mm)
(mm)
5
6
7
5
6
7
4
5
Max. stitch
length
(mm)
0.8– 3.7 0.8 – 1.8
0.8– 3.7 0.8 – 1.8
0.8– 3.7 0.8 – 1.8
Differential
ratio
··· Light-weight materials ··· Heavy-weight materials
··· Medium-weight materials ··· Extra heavy-weight materials
Note: Changing specifications between standard, high lift and super− high lift requires a large number of part replacements.
Device Model
Pneumatic presser foot lifter PL1
Pneumatic vertical chain cutter
Metering and inserting device with
tape cutter
Automatic tape feeder Vertical type TFV
Chain cutter and dust box CV1
Chain cutter only CV7
MC3
K11−02, 04, 12
K21−03, 04, 92
K11−02, 04, 12
K21−03, 04, 92
K11−52
K11−52
EF3-K11, K21 2/7
2000.7
Height of
presser foot
feed dog
(standard)
Needle size
Max. speed
Attachment
presser foot
(standard)
Needle size
Max. speed
(mm)
5 1.6 3 - Row 9 8,500 S
7 1.6 3 - Row 11 6,500 S H
Pitch of
(mm)
Type of feed
dog
(DC x 27)
(rpm)
Looper
locus
5.5 1.6 2 - Row 9 8,500 S
5.5 1.6 3 - Row 9 7,000 H MC3 device
Height of
(mm)
5.5 1.6 3 - Row 9 7,500 H
7 1.6 3 - Row 11 6,500 SH
Pitch of
feed dog
(mm)
Type of feed
dog
(DC x 27)
(rpm)
Looper
locus
Blind
hemming
ruler
Attachment
5.5 1.6 2 - Row 9 8,000 S
Over- looper locus: S Standard lift
H High lift
SH Super high lift
2000.7
Cloth plate
Blind hemming
ruler
EF3-K11, K21 3/7
Gauge parts list
[Models EF3-K11]
Sub−class 02−3 02−4 02−5 04−3 04−4 04−5
C−26
Needle
C−31
Needle plate
G−35
Main feed dog
assy
151474−009 ← ← 151474−011 ← ←
SP1160−001 SP1161−001 SP1162−001 SP1163−001 SP1164−001 SP1165−001
SP1320−001 SP1323−001
← ← ← ←
SP1340−001
G−41
Differential feed
dog
F−40
Presser foot
F−41, F−47
Presser foot
finger
H−17
Lower knife
← ← ← ← ←
SP1210−001
← ← ← ← ←
SP1211−001 SP1212−001 SP1211−001 SP1212−001
← ←
SP1364−001 SP1363−001 SP1364−001 SP1363−001
← ←
SP1402−001 SP1403−001
K−27
Upper looper
SP1427−001
J−16
Lower looper
← ← ← ←
← ← ← ← ←
EF3-K11, K21 4/7
2000.7
Gauge parts list
[Models EF3-K11]
Sub−class 12−3 12−4 12−5 52−4 04−3 Option 04−4 Option 04−5 Option
C−26
Needle
C−31
Needle plate
G−35
Main feed dog
assy
G−41
Differential feed
dog
151474−009 ← ← 151474−011 ← ← ←
SP1166−001 SP1167−001 SP1168−001 SP1169−001 SP1160−001 SP1161−001 SP1162−001
SP1325−001 SP1327−001 SP1320−001
← ← ← ←
SP1341−001 SP1340−001
← ← ← ← ←
F−40
Presser foot
F−41, F−47
Presser foot
finger
H−17
Lower knife
K−27
Upper looper
SP1215−001 SP1220−001 SP1210−001
← ← ← ←
SP1216−001 SP1217−001 SP1211−001 SP1212−001
← ←
SP1364−001 SP1363−001 SP1364−001 SP1363−001
← ← ←
SP1402−001 SP1404−001 SP1403−001
← ← ← ←
J−16
Lower looper
← ← ← ← ← ← ←
2000.7
EF3-K11, K21 5/7
Gauge parts list
[Models EF3-K21]
Sub−class 03−5 03−6 03−7 04−5 04−6 04−7
C−26
Needle
C−31
Needle plate
G−35
Main feed dog
assy
151479−009 ← ← 151479−011 ← ←
SP1170−001 SP1171−001 SP1172−001 SP1173−001 SP1174−001 SP1175−001
SP1320−001 SP1323−001
← ← ← ←
SP1340−001
G−41
Differential feed
dog
F−40
Presser foot
F−41, F−47
Presser foot
finger
H−17
Lower knife
← ← ← ← ←
SP1210−001
← ← ← ← ←
SP1234−001 SP1235−001 SP1234−001 SP1235−001
← ←
SP1363−001
← ← ← ← ←
SP1406−001 SP1403−001
K−27
Upper looper
SP1428−001 SP1427−001
J−16
Lower looper
← ← ← ←
← ← ← ←
EF3-K11, K21 6/7
2000.7
Gauge parts list
[Models EF3-K21]
Sub−class 92−4 92−5 04−5 Option 04−6 Option 04−7 Option
C−26
Needle
SP1176−001 SP1167−001 SP1177−001 SP1167−001 SP1170−001 SP1171−001 SP1172−001
C−31
Needle plate
G−35
Main feed dog
assy
G−41
Differential feed
dog
151479−009 ← 151479−011 ← ←
(Accessories)
SP1325−001 SP1320−001
← ← ←
SP1341−001 SP1340−001
← ← ←
SP1215−001 SP1210−001
F−40
Presser foot
F−41, F−47
Presser foot
finger
H−17
Lower knife
K−27
Upper looper
← ← ←
SP1236−001 SP1217−001 SP1234−001 SP1217−001 SP1234−001 SP1235−001
←
(Accessories)
SP1363−001
← ← ← ←
SP1405−001 SP1403−001
← ← ←
SP1427−001
J−16
Lower looper
← ← ← ←
2000.7
EF3-K11, K21 7/7
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