Brother EF4-V41 User manual

SERVICE MANUAL
FOR
V SERIES
OVERLO CK SEWING MACHINE
EF4-V41 • V51 •MA4- V61
EF4-V71 • V81 •MA4- V91
EF4-V72•V82 •MA4 -V 92
•
From the library of: Superior Sewing Machine & Supply LLC

CONTENTS
( PRODUCT SPECIFICATION CODE SETTINGSTANDARD ) · · · · ·· · · · · · · · · ·· · · · · · · · · · · ·
( SPECIFICATION LIST ) · · · · · · · · · · ·· · · · · · · · · · · · · · · ·· · · ·· · · · · · · · · · ·· · · · · · · · ·· · · · · · · · · · · ·· 4
( MECHANICALDESCRIPTIONS ) · · · · · · · · ·
·· · · · ·· · · · ·· · · · · ·· · · · ·· · · · · · · · ·· · · · · · · · · · · · 16
III Needle bar mechanism . . . . . . . . . . .. . . . . . . . . . . . . . . .. . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
1Z1 Under looper mechanism .............................. ~ .............................. 17
00 Over looper mechanism . . . . . . . . . .. . . . . . . . . . . . . . .. . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . 18
1!1 Double chain stitch looper mechanism (V61, V91, V92) ................................... 19
liD Knife mechanism . . . . . . . . . . . . . . . .. . . . . . . . . . . . . .. . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
[§] Presser
foot mechanism . . . . . . . . . . .. . . . . . . . . . . . . . . .. . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
[1] Feed mechanism .... ~ . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . .. . . . . . . . . .. . . . . .. . . . . 23
[I] Upper feed mechanism ............................................................... 25
00 . Lubrication . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . .. . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
( DISASSEMBLY ) · · · · · · · · · · · · · · · · · · ·· · · · · · · ·· · · · · · · ·· · · ·· · · · · · · ·· · · · · · ·· · · · · ·· · ·· · ·· · · 30
III Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . .. . . . . . . . . . .. . . . . . . . . .. . . . . . . . . . . 30
IZ1 Presser foot mechanism ............................................................... 31
00 Knife mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . .. . . . . . . . . . . 32
1!1 Under looper mechanism ............................................................. 33
liD Over looper mechanism . . . . . . . . .. . . . . . . . . . . . . . . . . .. . . . . . .. . . . . . . . . . . . . . . . .. . . . . . . . . . . 34
[§] Double chain stitch looper mechanism . . . . . . .. . . . . . . . . .. . . . . . . . . . .. . . . . . .. . . . . . . . . . . . . . 35
[1] Needle bar mechanism . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . .. . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . 36
[I] Feed mechanism . . . . . . . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . 37
II] Upper feed mechanism . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . .. . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . 38
( ASSEMBLY ) · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·· · · · · · · ·· · · · ·· · · · · ·· · · · · · · · ·· · · · · · · · · · · ·· 41
III Upper feed mechanism ............................................................... 41
IZ1 Feed mechanism . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . .. . . . . . . . . . .. . . . . .. . . . . . . . . . . . . . . . 45
00 Needle bar mechanism . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . .. . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . 48
1!1 Under looper mechanism . . . . . . . . . . . . . . . . . .. . . . . . . . . . .. . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . SO
[§] Over looper mechanism . . . . . . . . .. . . . . . . . . .. . . . . . . . . . . . . . . . . . . . .. . . . . . . . . .. . . . . . . . . . . . 52
00 Double chain stitch looper mechanism . . . . . .. . . . . . . . . . .. . . . . . .. . . . .. . . . . . . . .. . . . . . . . . . . 54
[1] Knife mechanism . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . .. . . . . .. . . . . . . . . . . . . .. . . . . . . . . . . . 57
[I] Presser foot mechanism . . . . . . . . . . . .. . . . . . . .. . . . . . . . . . . . . . . . . . . . .. . . . . . . . . .. . . . . . . . . . . . 59
00 Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 61
From the library of: Superior Sewing Machine & Supply LLC

( STANDARD ADJUSTMENTS ) ······· · · · · · · · ·········································· 62
[I] Adjusting the height and location of the needle . . . . .. . . . . . . . . . . .. . . . . . . . . . . . . . .. . . . . . . . 62
lZ1 Adjusting the under looper, the movable needle guard, and needle guard (F) . . . . . . . . . . . . . . 63
rn1 Adjusting the over looper ............................................................. 65
1!1 Adjusting the chain stitch looper, chain stitch needleguards (B) and (F) . . . .. . . . . . . . . . . . . . . 66
[§] Adjusting the backward and forward movement of the chain stitch looper . . . . . . . . .. . . . . . . 67
[§] Adjusting the presser foot ............................................................ 68
11] Adjusting the height of the knife . . . . . . .. . . . . . . . . . . . . . .. . . .. . . . . . . . . .. . . . . . .. . . . . . . . . . . 71
00 Adjusting the height of the feed dog . . . . . . .. . . . . . . . .. . . . . .. . . . . . . . . .. . . . . . . . . .. . . . . . . . 72
00 Adjusting the positions of the needle-thread take-upand the needlethread guide . .. . . . . . . 75
1m! Adjusting the position of the looper thread take-up ..................................... 76
Ill] Adjusting the horizontal feeding timing (position of the level feed eccentricwheel) . . . . . . . . 76
H2l Adjusting the standard position of the horizontal feeding (level feed adjustarm) . . . . . . . . . . 77
111 Adjusting the horizontal feed amount . . . . . . . . .. . . . . . . . . . . .. . . . . . . . . .. . . . . . . . . . .. . . . . . . 77
Ml Adjusting the standard of the vertical feeding .. .. . . . .. . .. .. . .. .... .. .... . .. . .. .. .. . . . .. 78
1m Adjusting the height of the upperfeed bar ............................................. 79
11§) Adjusting the clearance between the upperfeed dog and the lower feed dog . . . . . .. . . . . . . 80
lll1 Adjusting the vertical feed amount of the upperfeed dog . .. . . . . . . . . . .. . . . . . . . . . . . . . . . . . 81
1m] Adjusting the differential ratio ........................................................ 82
Iii Adjusting the clearance between the cloth plateand the needle plate . . . . .. . . . . . . . . . . . . . . 83
( TROUBLESHOOTING ) · · · ·· · · · · · · · · · · · · · ·· · · · · · ·· · · · · · · · · ·· · · · · · · ·· · · · · · · · · ·· · · · · · · · · 84
[1] Needle thread breakage . . . .. . . . . . . . . . . . . . . . . . . .. . . . . . . . . .. . . . . . . . . .. . . . . . . . . . . . . . . . . . 84
lZ1 Looper thread breakage .............................................................. 85
rn1 Needle breakage . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . .. . . . . . .. . . . . . .. . . . .. . . . . . . . . . . . . . . . 88
1!1 Improper thread tension .............................................................. 88
1m Improper chaining-off ................................................................ 88
[§] Puckering ........................................................................... 89
11] Slippage cloth ....................................................................... 90
00 Doublescooping (overlocking) . : ...................................................... 90
( NEEDLE SIZE AND UPPER LOOPER ) · · · · · · · · · ·· · · · · · · · · · · ·· · · · · · · · · · · · · · · ·· · · · · · · · · 91
( MATERIALTHICKNESSANDSTITCHWIDTH ) · · ·· · · · · ·· · · · · · ·· · · · · ·· · · · · · · · ··· · · · · 92
(
TIMINGGAUGETABLE ) ································· ··························· 93
From the library of: Superior Sewing Machine & Supply LLC

PRODUCT SPECIFICATION CODE SETTINGSTANDARD
Model plate
MADE IN JAPAN
[Model] (Max. sewing speed 7500-8500 spm)
Specification
Stitch
width
Device
EF4-V41 (Ultra high speed single needle over lock sewing machine)
EF4-V51 (Ultra high speed twin needle overlock sewing machine)
MA4-V61
(Ultra high speed safety stitch sewing machine)
* Refer to SPECIFICATION LIST for details.
[Stit
ch width]
[Specification]
~-0
[ill- [E)
@]-[ill
2 .. .... .
3
4 ...... .
Stitch wi d th 2 mm
Stitch width 3 mm
Stitch width 4 mm
5
....... .
6
7 ....... .
Stitch wi dt h 5 mm
Stitch
width 6 mm
Stitch
width 7 mm
Model plate
~~ii;;;i~iiiiiiiiiiiiil -- Specification
Stitch
width
Device
MADE IN JAPAN
[Model] (Max.sewing speed 6000-6500 spm)
EF4- V71 EF4-V72 (High speed single needle adjustable top and bottom feed overlock sewing machine)
EF4-V81 EF4-V82 (H i gh speed twin needle adjustable top and bottom feed overlock sewing machin e)
MA4-V91 MA4-V92 (High speed top and bottom feed safety stitch sewing machine)
[Sewing
type]
2 ...... . Back feed
type
Frontfeed type
- 1-
From the library of: Superior Sewing Machine & Supply LLC

[Device]
Model .
V71
V81 V91
Device
V41
V51
V61
V72 V82 V92
Stitch numbercontrol
ATC1
0 0 0 0 0 0
Automatic tape cutter
Suction pipe,tension release, stitch number control
ATC3
0 0 0 0 0 0
Suction pipe, stitch number cont~ol
ATCS
0 0 0 0 0 0
Horizontal
TFH
0 0 0 0 0 0
Automatic tape feeder Vertical 0 0 0 0 0 0
TFV
For single needle with NP tension release
SBL1
0 --- - -
Semi-autobacktack device For
twin needle with NP tension release
SBL2 -0 ----
Pneumatic rearsuction
CV1
0 0 0 0 0 0
Pneumatic front suction
CV3
0 0 0 ---
Vacuum type rearsuction
CV4
0 0 0 0 0 0
Vertical chain cutter
0 0 0
Vacuum type front suction
CV6
-- -
Chain cutteronly, rear suction
CV7
0 0 0 0 0 0
Chain cutter only, front suction
CV9
0 0 0 ---
Pneumatic CH1
0 0 0 0 0 0
Horizontal chain cutter
Vacuum type
CH2
0 0 0 0 0 0
Chain cutteronly CH3
0 0 0 0 0 0
Pneumatic knee switch
TC1
0 0 0 0 0 0
Tape cutter
Solenoid knee switch TC3
0 0 0 0 0 0
Solenoid hand switch TCS
0 0 0 0 0 0
Automatic presser foot I ifter
Pneumatic
PL 1 0 0 0 0 0 0
* The blower motor for the chain cuttervacuum type is optional.
-2-
From the library of: Superior Sewing Machine & Supply LLC

[Stitch type]
Stitch formation (503) (504) (505) (512)
One needle with two threads One needle with threethreads One needle with threethreads Two needles with fourthreads
Serging Plain stitching Blind-hemming Mock-safety
Stitch formation (514) (515) (516)
Two needles with four threads Two needles with fourthreads Two needles with fivethreads
Safetystitching Safetystitching
-3-
From the library of: Superior Sewing Machine & Supply LLC

c SPECIFICATION LIST )
A: Sewing sleeves on
E: Blind-hemming
c
B: Forming sleeves
F: Serging
C: Joining bodyparts
G: Sewing frillson
F
0
0: Joining inner leg
H: Joining shoulder
Ultra high speed single·needle overlock sewing machine
EF4-V41
4;,
[Main)
~
~
[] *
==
:t
m +
~.<
lr
I
00
--
~
Subclass Stitch type
No. of No. of Needle Stitch Max. Differential Height
of Pitch of Dlfferen Needlesize
needle= hread5
~auge
width
stitch ratio presser feed dog Ia I)
0007
mm)
(®)
length
foot
(mm) Type
of
(~)
(mm) feed
dog
01-3 a 3 H
-4 4
1 3 -0.9-3.8
0.7-2
5 1.6
Ill
#11
-5
5
-6 (504) 6
02-5 a 5 n
-6
1 3 -6 0.6-2.6
1-3
6 2.5
Ill
#14
-7
7
(504)
03-3 8 3 n
-4 3
1 -4 0.9-3.8
0.7-2
5 1.6
II
#9
-5
5
(505)
04-3
~3)
3 m
-4 1 2 -4
0.9 ·3.8
0.7-2
5 1.6
II
#9
-5
5
(Using spreader)
05-4
~3)
4 '
1 2 -1.4·5.9
0.7-1.3
5 1.6 k
#14
-5
5
(Using spreader)
NOTE: The rotating speed has been set according to Brother'sstandard sewing specification.
-4-
l)j
Max.
s=
(spm)
8500
8000
8500
8500
8500
S: Standard specification
H: High
lift specification
m
Looper Usage (Material) Attachment
path
Thin and medium
s thick materials
H -
(-6)
A, B,C, D
Bulky knits
H
(With angle
knife)
A,B,C
Blind-hemming Blind-
s hemming
E
ruler
Blind-hemming Blind-
s hemming
E ruler
Serging
s Serging ruler
F
From the library of: Superior Sewing Machine & Supply LLC

H r
-~
F
t-C
c
G E
F r
0 F
~
[Main) m
<,
ij
l]
lf
==
~
ir
~
+
~
00
~
I
--
Subclass
Stitchtype No.
of No. of
Needle Stitch Max. Differential
~eight of Pitch of Differen1 Neediesize Max. Looper
Usage (Material) Attachment
t~eedle!
hreads
~auge
width stitch ratio presser feedd99 ial)
DCx27
s=
path
mm)
(®)
length
foot (mm) Type
of
(~~)
(mm) feed dog
(spm)
06--4
~
4 p Serging
1 3 -1.4-5.9
0.7-1.3
5 1.6 k
#14
8500 s Serging ruler
-5
5 F
(504)
~
~
Curlin~ (lower
07-2 2 curing)
1 3 -
0.9-3.8
0.7-2
5 1.6 #11 8500 s -
-3
3 I -
(504)
~
[ Ruffling
08-5 1 3 -5 0.8-3.2
0.8-2.8
5 1.6 #11 7500 s Ruffling
attachment
(504) m A,G
~
[ Ruffling (withpiping) Parts
of
09-5 1 3 -5
0.8-3.2
0.8-2.8
5 1.6 #11 7500 s ruffling
m A,G attachment
(504)
~
n Taping
with thin and
10-4 4 s medium thick
materials
-5
1 3 -5
0.9-3.8
0.7-2
5 1.6
~
#11 8500 H Tapeguide
-6 6
(-6)
H
(504)
11-5
~·
5 H Taping
with
bulky knits Tape guide
-6
1 3 -6
0.6-2.6
1-3
6 2.5
Ill
#14
8000 H (with angle
-7
knife)
7 H
(504)
~·
n Backtacking
with
12-3 3
thin and medium
thickmaterials Backtacking
-4 1 3 -4 0.9 ·3.8
0.7-2
5 1.6 #11 8500 s
D parts
-5
5 A,B,C,D
(504)
~·
n Softchaining
with
17-3 3 thick
and medium
thick materials
-4 1 3 -4 0.9-3.8
0.7-2
5 1.6
~
#11 8500 s -
-5
5
(504)
-5-
From the library of: Superior Sewing Machine & Supply LLC

<:,
~
Subclass
Stitch type No. of
reedle
22-4
-5
-~
2
-6
··,
. --... :
-7
{514)
23-4
a.
-5
-6
2
-7
(5 4)
(Mock-safety)
24-5
~
-6
•'
2
-7
,·,"'-
,
(514)
25-5
~
-6 2
-7
{512)
(Mock-safety)
27-5
-6
-~
2
·:·--..
-7
(514)
28-5
~
-6
2
-7
{512)
(Mock-safety)
31-6
-~
2
-7
{514)
32-6
~2)
2
-7
(Mock-safety)
G
F
Ultra high speed twin needle overlock sewing machine
EF4-V51
H: High lift specification
E: Extra high lift specification
~
(Main} m
[]
'ff
==
~
+
eD)
~<
lr
0
00
--
!:::!::!:::!::>
e
No. of Needle Stitch Max. Differential !Height
of
Pitch of Oifferen Needle size Max. Looper
Usage (Material) Attachment
hreads
~auge
width stitch ratio presser
feedd~
Ia I]
DCx27
sewlnJ' path
mm)
(®)
length
foot
(mm) Type
of
spee
(~)
(mm} feed dog (spm)
4 H Mediumthick and
5 heavy materials
4 2.2
0.9·3.8
0.7-2
5.5 1.6 I #11 8000 H -
6 A,B,C,D
7
4 H Mediumthick and
5 heavy materials
4 2.2 6
0.9 ·3.8
0.7-2
5.5 1.6
lit
#11 7000 H -
7 A,B,C
5 n Thin and medium
thick materials
4 3 6
0.9·3.8
0.7-2
5.5 1.6
Ill
#11 8000 H -
7 A,B,C
5 n Thin and medium
thick materials
4 3 6
0.9·3.8
0.7-2
5.5 1.6
Ill
#11 7000 H -
7 A,B,C
5 n Bulky knits
4 2.2 6
0.6·2.6
1-3
5.5 2.5
#14 7500 H
(With angle
lh
knife)
7 A,B,C
5 H Bulky knits
4 2.2 6
0.6·2.6
1-3
5.5 2.5
#14 7000 H
(With angle
• knife)
7 A,B,C
6 H Extra heavy materials
4 3
1.2· 5.0
0.7-1.4
6 2.5 •
#18 6500 E
(With angle
7 knife)
A,B,C,D
6 H
4 3 1.2.
5.0
0.7-1.4
6 2.5
#18
6500 E
7
lh
-6-
From the library of: Superior Sewing Machine & Supply LLC

<f;, (Main) m
~
j
[]
~
==
~
~
+
f)j
~<
lr
I
00
--
~
Subclass
Stitch type No.
of
No. of Needle Stitch
MalC. Differential Height of
Pitch of Differen1 Needle size
MalC.
Looper Usage (Material) Attachment
t~eedle!
hreads
~auge
width
stitch ratio presser feed dog ial)
DClC27
sew~
path
mm) ('(&') length
foot (mm) Type
of
spe
(~)
(mm) feed dog
(spm)
.·~
I Ruffling
33-5 2 4 2.2 5
0.8-3.2
0.8-2.8 5.5 1.6 #11 7500 H Ruffling
attachment
· .........
m A,G
(514)
~2)
[ Ruffling
34-5 2 4 2.2 5
0.8-3.2
0.8-2.8
5.5 1.6 #11 7500 H Ruffling
attachment
m A,G
(Mock-safety)
37-5 [ Ruffling
(with piping) Ruffling
--~
2 4 2.2 5
0.8-3.2
0.8-2.8
5 1.6 #11 7500 H attachment,
-6
·:·-.....
A,G piping parts
(514) m
~
5 [ Ruffling (with piping) Ruffling
38-5 2 4 2.2
0.8-3.2
0.8-2.8 5 1.6 #11 7500 H attachment,
6 m A,G piping parts
(512)
.,~
n Taping
with thin and
medium thick
41-5 5 materials
2 4 2.2
0.9-3.8
0.7-2 5.5 1.6
Ill
#11 8000 H Tape guide
-6
6 H
(514)
~2)
H Taping
with thin and
medium thick
42-5 5 materials
2 4 2.2
0.9·3.8
0.7-2 5.5 1.6
Ill
#11 7500 H Tape guide
-6
6 H
(Mock-safety)
45-5 5 H Taping
with
bulky knits Tape guide
-6
-~
2 4 2.2 6
0.6-2.6
1-3
5.5 1.6
#14
8000 H
(with angle
,·,
HI
knife)
-7
._ ........
7 H
(514)
46-5
~2)
5 H Taping
with
bulky knits Tape guide
-6
2 4 2.2 6
0.6-2.6
1-3
5.5 1.6
Ill
#14 7500 H
(with angle
-7
7 H knife)
(Mock-safety)
H Backtacking
with
thin and medium
49-5 5 thick materials
2 4 2.2
0.9-3.8
0.7-2 5.5 1.6 #11 8000 H Backtacklng
~
Ill
-6
~~~~.
6 parts
(514) A,B,C,D
57-6
.~
6 n Bulky knits
2 4 2.5
0.6-2.6
1-3
7 2.5
Ill
#14
6500 E (Withangle
-7
7 knife)
(514) A,B,C
-7-
From the library of: Superior Sewing Machine & Supply LLC

c
F G
Ultra high speed safety stitch sewing machine
MA4-V61
S: Standard specification
H: High
lift specification
E· Extra high lift specification
~
[Main] m
<,
~
[l\
~
==
~
lr
~
+
f)j
00
~
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--
Subclass Stitch type
No. of No. of
Needle Stitch Max. Differential [Height
of Pitch of Differen Needle size Max. Looper
Usage (Material) Attachment
~eedle!
hread
lauge
width stitch ratio presser feedd!>Q ial]
DCx27
sew~
path
mm)
(®)
length
foot
(mm) Type
of
spe
<mr>
(mm) feed dog (spm)
61-2 2
~
Thin materials
-3
<'~
3
2 5 2
0.9·3.8
0.7-2
5 1.6
~
#11 7500 s -
-4
~.
4
A,B,C
-5
(516) 5
62-2
~
2
IY
-3
3 Thin materials
-4
2 4 2 4
0.9·3.8
0.7-2
5 1.6
~
#11 7500 s -
-5 {515) 5
A,B,C
(Using spreader)
63-3 3
~
Thin and medium
-4 4 s thick materials
-5
-~
2 5 3 5
0.9-3.8
0.7-2
5 1.6
#14
7500 H(-6) -
·~·
-6
*r""··
6
hi
{-7)
A,B,C,D
-7
{516) 7
64-3
~~
3
~
Thin and medium
-4 4 s thick materials
-5
2 4 3 5
0.9-3.8
0.7-2
5 1.6
#14
7500 H{-6) -
-6
(515) 6
ld
{-7)
A,B,C,D
-7
(Using spreader) 7
65-4 4
~
Mediumthick and
-5
5 s heavy materials
>~
2 5 5
0.9 ·3.8
0.7-2
5 1.6
#16
7500 H{-7) -
-6
·'-.· ..
6
ld
(-6)
A,B,C,D
-7 {516) 7
66-4
~~)
4
~
Mediumthick and
-5
5 s heavy materials
-6
2 4 5 6
0.9-3.8
0.7-2
5 1.6
#16
7500 H(-7) -
-7
7
ld
(-6)
A,B,C,D
(Using spreader)
<~6)
t Ruffling
with thin
67-4 4 and medium thick
materials
2 5 2
0.8-3.2
0.8-2.8
5 1.6
#14
7000 s Ruffling
-5
5 attachment
(Using spreader) m
A,G
<~,6)
t Ruffling
with thin
68-4 4 and medium thick
materials
2 4 2
0.8-3.2
0.8-2.8
5 1.6
#14
7000 s Ruffling
-5
5 attachment
(Using spreader) m
A,G
-8-
From the library of: Superior Sewing Machine & Supply LLC

A c
F
~
[Main) m
<::,
ij
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=..,..
~
db 0 +
l)j
00
--
a
Subclass Stitch type
No. of No. of
Needle Stitch Max. Differential Height
of
Pitch of
Differen1 Needle size Max. Looper
Usage (Material) Attachment
~eedle! hreads
lauge
width stitch ratio presser feed dog ial)
DCx27
5~~~
path
mm)
('®)
length
foot (mm) Type
of
(~)
(mm) feed dog (spm)
t Ruffling
with thin
and mediumthick
69-4 4 materials Ruffling
~
2 5 3
0.8-3.2
0.8-2.8
5 1.6
#14
7000 s
<. .... . attachment
-5
5
A,G
(516) m
~5)
t Ruffling
with thin
and medium thick
70-4 4 materials Ruffling
2 4 3
0.8-3.2
0.8-2.8 5 1.6
#14 7000 s attachment
-5
5
A,G
(Using spreader) m
t Ruffling
with
s mediumthick and
71-5 5 heavy materials Ruffling
/~
2 5 5
0.8-3.2
0.8-2.8
5 1.6
#14 7000 H
t..,.,.
attachment
-6
6
(-6)
(516) m
A,G
~5)
t Ruffling
with
s medium thick and
72-5
5 heavy materials Ruffling
2 4 5
0.8-3.2
0.8-2.8
5 1.6
#14 7000 H attachment
-6 6
(-6)
m
A,G
(Using spreader) t Ruffling(and piping)
with thin and
medium thick Ruffling
#14
7000 s materials
75-5
-~
2 5 3 5
0.8-3.2
0.8-2.8 5 1.6 attachment,
"-· ...
piping parts
A,G
(516) m
~5)
t Ruffling (and piping)
with thin and
medium thick Ruffling
s
materiaio;.
76-5 2 4 3 5
0.8-3.2
0.8-2.8
5 1.6
#14
7000 attachment,
A,G
piping parts
(Using spreader) m
<~
t Ruffling(and piping)
with medium thick
77-5 5 s and heavy materials Ruffling
2 5 5
0.9-3.8
0.8-2.8
5 1.6
#14
7000 attachment,
-6
6
H(-6)
piping parts
(516) m
A,G
~5)
t Ruffling (and piping)
with medium thick
78-5 5 s and heavy materials Ruffling
2 4 5
0.8-3.2
0.8-2.8
5 1.6
#14
7000 attachment.
-6
6
H(-6)
piping parts
(Using spreader) m
A,G
-9-
From the library of: Superior Sewing Machine & Supply LLC

~
[Main)
~
+
l)j . m
<::.,
ij
lf
@..;
==
lr
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l]
00
II
--
~
Subcla$$ Stitch type
No. of
No. of Needle Stitch Max. Differential Height
of
Pitch of
Differen Needle size Max. Looper
Usage (Material) Attachment
reedles hreads
~auge
width
stitch ratio presser feed dog ial) 0Cx27
sewincr
path
mm)
('&)
length
foot
(mm) Type of
spee
~~
(mm) feed dog
(spm)
<~
-~
Taping with thin and
medium thick
81-4 4 materials
2 5 3 0.9-3.8
0.7-2 5 1.6
#14 7500 s Tape guide
-5 5
hi
{516) H
~
~
Taping with thin and
medium thick
82-4 4 materials
2 4 3 0.9-3.8
0.7-2
5 1.6
#14 7500 s Tape guide
-5
{515) 5
hi
(Using spreader) H
~
Taping with medium
83-4 4 thick and heavy
-5
/~
2 5 5 0.7-2
materials
t.._ • .,.._"·
5 0.9-3.8 5 1.6
#16 7500
H(-6)
Tape guide
-6 6
ld
H
{516)
84-4
~
ICB
Taping with medium
4 thick and heavy
-5 2 4 5 5 0.9-3.8
0.7-2
1.6 materials 5
#16 7500
H(-6)
Tape guide
-6 (515) 6
~
H
(Using spreader)
85-3 3
~
Extra heavy materials Tractor
foot
/~
2 5 3
1.2-5
0.7-1.4
3.5 2.5
~
#18 6500 E
l~,._ • .,..
(with angle
-5
5 knife)
(516) A,B,C
~5)
~
Extra heavy materials
86-5 2 4 3 5
1.2-5
0.7-1.4
3.5 2.5
#18
6500 Tractor
foot
~
E
(with angle
A,B,C,D knife)
(Using spreader)
lw
Binding with thin
89-4 4 and medium thick
<~
2 5 3 0.9-3.8
0.7-2
5 1.6
#14
6500 materials Binding {~ ....
~
s
-5
5 parts.tape
(516) C,H,J guide
~5)
~
Binding with thin
90-4 4 and medium thick
2 4 3 0.9-3.8
0.7-2
5 1.6
#14
materials Binding
~
6500 s
-5
5 parts.tape
guide
(Using spreader) C,H,J
92-5
<~
5
~
Extra heavy materials
-6 2 5 5 6
1.2-5
0.7-1.4
3.5 2.5
#18
6500 E Tractor
foot
~
(with angle
-7
7 A,B,C,D knife)
{516)
93-5
~
5
~
Extra heavy materials
-6 2 4 5 6
1.2-5
0.7-1.4
3.5 2.5
#18
6500 E Tractor
foot
~
(with angle
-7 {515) 7 A,B,C,D knife)
(Using spreader)
-10-
From the library of: Superior Sewing Machine & Supply LLC

High speed adjustable top and bottom feed Overlock sewing machine (Back type)
EF4-V71·V81, MA4-V91
E: Extra high lift specification
<:::,
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1§1 1§1
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Stitch type
No. of No. of Needle Stitch Stitch Lowerfeed
He~~ht
Height Max.
Shape Needle Max. Looper Usage (Material) Attachment
~eedles
hreads
~auge
width length differential
ofupJ:r
uffe:I
[and pitch size
s;=
path
mm)
('&) (®)
ratio presser eed og
of lower (0Cx27)
(~~\
(mm) amount feed dog
(spm)
71..01-3
~
3 H
-4
4
Ill
Thin and medium
1 3 -
0.9-3.8
0.7-2 5.5 5 6 #11 6500 H thick materials -
·5 5
-6 (504) 6
{1.6)
81·22-4 4 H
·5
-~
5 Thin and medium
2 4 2.2
0.9-3.8
0.7-2 5.5 5 6
~
#11 6500 H thick materials -
-6
:- ........ ~.
6
-7
(514) 7 (1.6)
91-63·3 3 p
-4 4
2 3 5
0.7-2 5 5 6
#14
6500 Thin and medium
·5
-~
5
0.9-3.8
H thick materials -
1\.•q.
hi
·6 6
-7 {516)
7 (1.6)
91-65·3 3 p
-4 4
5 5 6
#16
6500 Mediumthick and
-5
/~
2 5 5 5
0.9-3.8
0.7-2
H heavy materials -
r. .•.
hi
-6 6
-7
{516)
7 (1.6)
91-92-5 5 p Extra heavy Tractor
foot
·6
/~
2 5 5 6
0.9-3.8
0.7-2 3.5 6 6
#18
5500 E materials
(with angle
t... knife)
-7
7
ld
(516)
{1.0)
-11-
From the library of: Superior Sewing Machine & Supply LLC

High speed adjustable top and bottom feed overlock sewing machine (Front feed type)
EF4-V72•V82, MA4-V92
H: High lift specification
E: Extra high lift specification
~
lf
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Subclass
Stitch type
No. of No. of
Needle Stitch Stitch Lower feed
He~~ht
Height Max.
Shape
Needle Max. Looper
Usage (Material) Attachment
needles hreads
~auge
width length differential
of ur3cer
ureper
and pitch size
sew~
path
mm) (roo')
(~)
ratio presser eed og eed of lower
(DCx27)
spe
(~~\
(mm) amount feed dog (spm)
72.01·3 a 3 H
-4 4
~
Thin and medium
1 3 -
0.9-3.8
0.7-2 5.5 4.6 6 #11 6000 H thick materials -
·5 5
·6
(504) 6 (1.25)
~4)
n
72.01-4 4
~
Thin and medium
1 3 -
0.9·3.8
0.7-2
5.5 4.6 6 #11 6000 H thickmaterials -
·5 5
(Using small·
%:)presser
(1.25)
72.02·5 a 5 n
·6
1 3 -6
0.6·2.6
1-3
6.5 6.2 8
lh
#14 5000 E Bulky knits (Withangle
knife)
·1 7
(504)
(1.25}
a H
72.08·5 1 3 -5
0.9·3.8
0.7-2
5.5 3.5 8
~
#11 5000 E Shirring -
{504)
{1.25)
~
n
72-09·5 1 3 -5
0.9-3.8
0.7-2
5.5 4.7 8
~
#11 5000 E Shirring
with piping -
{504)
(1.25)
82·22-4
·~
4 n·5 5 Thin and medium
1~ '"'-~.
2 4 2.2
0.9-3.8
0.7-2
5.5 4.6 6 I #11 6000 H thick materials -
·6
6
·7
(514}
7 (1.25)
82-22·5
.• ~)
5
u-
Thin and medium
2 4 2.2
0.9·3.8
0.7-2
5.5 4.6 6 I #11 6000 H thickmaterials -
·6
6
(Using small·
%:resser
(1.25)
82·23-4
~
4 n
·5 5
2 4 2.2
0.9·3.8
0.7-2
5.5 4.6 6 #11 6000 H Thin and medium
·6
6
~
thick materials -
·7
{512}
7
(Mock-safety)
{1.25)
82·31·6 a 6 n Extra heavy
2 4 3
0.9 ·3.8
0.7-2
6.5 6.2 6
lh
#18
5500 E -
·7
{504)
7 materials
(Using small·
%:\presser
{2.5)
-12-
From the library of: Superior Sewing Machine & Supply LLC

Subclass
82·32·6
·1
82·33·5
·6
82·34·5
-6
82-37·5
·6
82·38·5
-6
82-41-5
-6
·1
82-42·5
·6
-7
82·51·5
·6
·1
82·57·5
-6
·1
High speed adjustable top and bottom feed overlock sewing machine (Front feed type)
EF4-V72•V82, MA4·V92
<:.,
~
~
~
~
~
8
§I §I
+
I))
rn
[]
c=:.=
B ~
00
~
c:;;v
Stitch type
No. of
No. of Needle Stitch Stitch Lowerfeed
He~~ht
Height Max. Shape Needle Max. ooper Usage (Material)
needles hreads
1auge
width
length
~Jfferential
~~~
'feper and pitch size sew~
path
mm) ('00')
(aD)
ratio presser
eecl
of lower
(0Cx27)
spe
~~~\
(mm)
amount
feed dog (spm)
~
6 n Extra heavy
2 4 3
0.9-3.8
0.7-2
6.5 6.2 6
lh
#18
5500 E materials
7
(512)
(Mock-safety) (2.5)
.~
5 H
2 4 2.2
0.9-3.8
0.7-2 5.5 3.5 8 I #11 5000 E Shirring
6
(514) (1.25)
~
5 9
2 4 2.2 0.9
·3.8
0.7-2
5.5 3.5 8 I #11 5000 E Shirring
6
(512)
(Mock-safety) (1.25)
:~
5 n
2 4 2.2
0.9·3.8
0.7-2
5.5 4.7 8
Ill
#11 5000 E Shirring
with piping
6
(514) (1.6)
~
5 n
2 4 2.2
0.9-3.8
0.7-2
5.5 4.7 8
IIi
#11 5000 E Shirring
with piping
6
(512) (1.6)
-~
5 I Taping
with thin
2 4 2.2 6 0.9
·3.8
0.7-2 5.5 4.6 6 #11 6000 H and medium
thick
·:...-.,.
materials
7
(514) (1.6)
~
5 I Taping
with thin
2 4 2.2 6
0.9·3.8
0.7-2
5.5 6 6 #11 6000 H and medium
thick
materials
7
(512) (1.6)
~
5 m
2 4 2.5 6
0.7-3.2
0.8-2.8 6.5 6.2 8
#14
5000 E Bulky knits
':·"'--.
7
1111
(514) (1.25)
·:~
5 w
2 4 2.5 6
0.7 ·3.2
0.8-2.8
6.5 6.2 8
#14
5000 E Bulky knits
7
uu
(514) (1.25)
-13-
Attachment
-
(With angle
knife)
-
-
-
-
Tape guide
Tape guide
(Wlthangle
knife)
(With angle
knife)
From the library of: Superior Sewing Machine & Supply LLC

High speed adjustable top and bottom feed overlock sewing machine (Front feed type)
EF4-V72·V82, MA4-V92
<,
~
~
~
==
j:
~
8
I§ ~
+
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m
[]
00
__j_
[;WI
ti i
Subclass Stitch type
No. of No. of
Needle Stitch Stitch Lower feed Height Height Max. Shape Needle Max. Looper Usage(Material)
~eedle!
hreads
~auge
width length
~ifferential of
ofu'fo:
uf:Jr
and pitch size
s;~
path
mm)
(COO') (®)
ratio presser
eeclog
of lower
(DCx27)
c~\
(mm)
amount
feed dog (spm)
92·63·3
<.~
3 f
-4
4
·5
2 5 3 5
0.9-3.8
0.7-2
5.5 4.6 6 #14 6000 H Plain stitching
·6
6
Ill
·7 (516) 7 (1.25)
92-63-4
.-~
4
h~
2 5 3 0.9
·3.8
0.7-2
5.5 4.6 6 #14
6000 E Plain stitching
·5
··~'<.. (516) 5
(Using small-
I ~~~~\presser
(1.25)
92·64·3
~
3
flu
-4
4
·5 2 4 3 5 0.9
·3.8
0.7-2
5.5 4.6 6 #14
6000 H Plain stitching
·6
(515) 6
·7 (Using spreader) 7 (1.25)
92-65·3 3 f
-4
4
·5
-~
2 5 5 5
0.9·3.8
0.7-2
5.5 4.6 6
#16 6000 H Plain stitching
l, ... ,
Ill
·6
6
·1
(516) 7 (1.25)
92-66-3
~
3
fld
-4
4
·5 2 5 5 5
0.9-3.8
0.7-2
5.5 4.6 6
#16
6000 H Plain stitching
-6
(515) 6
-7 (Using spreader) 7 (1.25)
92-69-4 4
f~u
·5
-~
2 5 3 5
0.9. 3.8
0.7-2
5.5 3.5 8
#14
5000 E Shirring
·\· ....
·6
6
(516) (1.25)
92-70-4
:}J
4
f~u
·5 2 4 3 5
0.9·3.8
0.7-2
5.5 3.5 8
#14
5000 E Shirring
·6
(515) 6
(Using spreader) (1.25)
92-71-5 5
fid
--~
2 5 5
0.9. 3.8
0.7-2
5.5 3.5 8
#14
5000 E Shirring
·6
..........
6
(516) (1.25)
92-72-5
~
5
fld
2 4 5
0.9-3.8
0.7-2
5.5 3.5 8
#14
5000 E Shirring
·6
6
(515)
(Using spreader)
(1.25}
-14-
Attachment
-
-
-
-
-
-
-
-
-
From the library of: Superior Sewing Machine & Supply LLC

Subclass
92-75-4
-5
-6
92-76-4
-5
·6
92·77·5
·6
92-78·5
-6
92-92-5
·6
·1
92-93·5
-6
·1
High speed adjustable top and bottom feed overlock sewing machine (Front feed type)
EF4-V72·V82, MA4·V92
<,
~
:rr
1f?
~=
~
~
8
(§ ~
+
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00
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~I
--
Stitch type
No. of
No. of Needle Stitch Stitch Lower feed Height Height Max.
Shape
Needle Max. Looper
Usage (Material)
reedles hreads
lauge
width
length
~ifferential of
ofu':cer
u~r
and pitch size
s:=
path
mm)
(®)
(®)
ratio
presser ~eed og
of lower
(DCx27)
foot (mm) amount feed dog (spm)
Cmml
4
P~u
0.7-2
4.7 8
#14
5000 E Shirring
-~
2 5 3 5
0.9-3.8
5.5 (with piping)
'\· ...
6
{516) (1.25)
4
P~~
-~
0.7-2
5.5 4.7 8
#14
5000 E Shirring
•~... .....
2 4 3 5 0.9
·3.8
(with piping)
(516) 6
(Using spreader) (1.25)
-~
5
pld
Shirring
2 5 5
0.9 ·3.8
0.7-2
5.5 4.7 8
#14
5000 E
(with piping)
''··~ .. ~
6
(516) (1.25)
~
5
pld
Shirring
2 4 5
0.9·3.8
0.7-2
5.5 4.7 8
#14
5000 E -
(with piping)
6
(515)
(Using spreader)
(1.25}
5
~~.~
6 #21 5500 E Extra heavy
·~~
2 5 5 6
0.9 ·3.8
0.7-2 3.5 5.7 materials
(:
..
7
(516) (2.5)
~
5
~~
6 #21 5500 E Extra heavy
2 4 5 6
0.9·3.8
0.7-2
3.5 5.7 materials
(515) 7
(Using spreader) (2.5)
-15-
Attachment
-
-
-
-
Tractor foot
(with angle
knife)
Tractor
foot
(with angle
knife)
From the library of: Superior Sewing Machine & Supply LLC

cMECHANICAL DESCRIPTIONS )
[!] Needle bar mechanism
Eccentric part
(1) When the crankshaft 0 rotates in the direction of the arrow, the needle driving crank rod assembly @
moves upand down on the eccentric part of the crank shaft.
(2) The needle driving crank rod assembly @ moves the needle bar clamp assembly e up and down via
the needleshaft@).
(3) The needle bar @) attached to the needle barclamp assembly e is guided by needle bar bushes (U) <9
and (D) 6, and is moved up and down.
-16-
From the library of: Superior Sewing Machine & Supply LLC

[2] Under looper mechanism
Eccentric part
(1) When the crank shaft 0 rotates in the direction of the arrow, the under looper connecting rod @
mounted on the eccentric part of the crankshaft moves upand down.
(2) The underloopershaft arm@) oscillates.
(3) The motion is transmitted to the under looper holder 0 and the under looper @} via the under looper
shafte.
-17-
From the library of: Superior Sewing Machine & Supply LLC