Consew 277RFS-3 Datasheet

OP RAT~ON INSTRUCT~ON & PARTS l~ST
FOR
From the library of: Superior Sewing Machine & Supply LLC

CONTJENT§
1.Brief instruction........................................................................................................................i
2.Main specifications.................................................................................................................1
3.Machine installation................................................................................................................i
4.1nstalling the motor
..................................................................................................................2
5.Connecting between the pedal and clutch lever....................................................................
6.1nstalling the presser foot lift control plate...............................................................................2
?.Installing the bobbin winder....................................................................................................3
8.1nstalling the thread stand.......................................................................................................3
9.0peration preparation.............................................................................................................3
1
O.Lubrication............................................................................................................................4
i 1.Trial running..........................................................................................................................4
i2.1nsialling the needle.............................................................................................................4
13.Coordination among the needle, thread and materiaL.......................................................5
14.Threading the needle thread................................................................................................5
i 5. Adjusting the tension of bobbin thread and needle thread...................................................5
i6.Winding the bobbin thread and adjustment.........................................................................6
17.Stitch length, forward and backward feed............................................................................?
i 8.Adjusting presser foot pressure.........................................................................................
..
i 9.Adjusting the amount of presser foot lift............................................................................
20.Adjusting the timing of feed..................................................................................................8
21.Adjusting the timing between needle and hook....................................................................8
22.1nstalling the hook positioning bracket and hook..................................................................8
i .Machine body.................................................................................................................... 9~i0
2.Upper shaft and thread take-up mechanism..................................................................i 1-12
3.Needle bar, rocking shaft, presser foot mechanism........................................................i 3- i 4
4.Vertical shaft, lower shaft mechanism.............................................................................
15-16
5.Feed mechanism............................................................................................................. 17-·ts
6.Threading mechanism..................................................................................................... 19~20
?.Accessories .................................................................................................................... 21
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From the library of: Superior Sewing Machine & Supply LLC

i. Brief introducHon
This machine is designed with sliding lever to take up thread
and horizontal hook catch thread, which product lockstitch.
Upper and lower shafts are driven by bevel gears; lever type
stitch regulator, compound feed
by feed dog, needle and
walking foot; high presser foot stroke and lifter, and long stitch
length, cylinder bed, Little running noise, it works well
what-
ever the surface of materials is smooth or roughness. It's easy
for sewing multi-layer leather and materials.
It's
Vlridely used for binding sewing on the medium and heavy
weight materials. (such as: handbag, shoes and other cylinder
type materials binding
se\\r:ing)
Unison feed by binder, feed dog, presser feed and needle,
which assures fully binding.
I 3. Machine ins~a!!ation
l. Location of the machine
The machine must be located on
th~ rigid and flat floor for
ensuring. its smooth operation and reducing its vibration.
Meanwhile, a rubber mat should be inserted between the
machine stand and the floor for further reducing the running
nmse.
2. Install the base and oil pan(Fig. 1)
First, Align the four screw holes of the machine base with
the ones
of the table and plunge four bolts A and tighten
the nuts. Then put the oil pan on the machine base smoothly.
3. Install the machine head (Fig. 2)
First, half of the hinge should
be made to engage with the
machine base, then put the machine head lightly on the
machine base, move it slightly to align the three screw
holes of the head with the ones of the hinge, insert three
screws A and tighten them.
2J\/iain specifications
~lication
Medium and heavy weight materials
---
Max. sewing speed
2500s.p.m
---
Stitch leng~h 0~6mm
Needle bar stroke
33.2mm
----~
Presser foot lift
8mm by hand
height
13mm by pedal
·--
Hook
Horizontal hook
Needle
DPx 17 16"-18"
Lubrication
--
'oiled by hand
--
-·
--
Motor power 370W
------------
c-46mm
--
Cylinder dia.
oil pan
I
table & I
~
2
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4.!nstadiing ~he motor (Fig.3) J
'-------~---~-
A
B
3 Align machine balance wheel belt groove A with motor pulley
belt groove B by moving motor C leftward or rightward.
Be sure that the belt is not touched with the table.
5.Connectting bettween the peolal and the clutch lever (IFigA)
E -------,--+-+
o---+--1-'
c--~
B ___ -+r
A~~~
4
1. The optimum tilt angle of pedal A against floor is approx.
15° .
2. Adjust the clutch of motor E so that the rod B and the
clutch lever C run in one line.
3. When running, the machine balance wheel G should rotate
counter-clockwise observed from opposite side of the
balance wheel. The motor D rotates in the same direction.
Thf rotation of motor can change by reversing the plug of
the motor.
4. Ad1ust the tension of V -belt by moving motor upward
or downward, The proJJer tension of V -belt is a slack of
10-12mm when the V -belt is depressed by forefinger.
6Jnsttamng tthe presser foot mt contra~ plate (1Fig.5)
5 First, the chain
hook A should be connected to the presser
foot lift lever C, then put the pedal assembly D on the stand,
move the control plate E leftward or rightward until the chain
becomes on one line, Tighten the bolts
and nuts, finally,
connect the chain hook to the control plate.
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7J ns~ai~ing the bobbin w~nder { Fig1. 6)
Align pulley B of the bobbin v.rinder with the outside of the V-
belt C, and there should be a proper clearance between them;
so that pulley B can be touched with the V -beh when latch
thumb lever A is depressed, thereby the V
-belt can drive the
pulley Bwhile the machine running.The bobbin winder should
be parallel with belt slit E of the table, then fasten
two wooden
screws
D.
The thread stand should be located on the right backside of
the table. Threading should be smooth when sewing.When the
machine head is turned backward, it should not be touched
with the thread stand, thentighten the nut
C.
1. Clearing the machine
Before the head is packed, all of the parts of the machine are
coated with anti-rust grease,meanwhile the grease can harden
and the dust can cover the machine surface during long time
storage and shipment, so, the dust and grease must be cleared
by clean cloth with gasoline.
2. Examination
Although every machine is conformed
by strict inspection and
test before delivery, the parts of the machine may be loose and
deformed afterlong distance transportation with jolt.A thorough
examination must be performed. Turn the balance wheel
slightly by hand to check ifthere is running obstmction, parts
collision, uneven resistance and abnormal noise.
If any of
these exist, adjustment must
be made accordingly before
running.
-3-
7
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b
1 O.lubrication (Fig.8) J
'------'--
Before running, the machine must be oiled at the places by
arrow shown. If the machine continues in operation, it should
be oiled not less
two times per shift. Please use HA -8 sewing
machine
oil or TJ-70 machine oiL
11 .Tria! running
Trial running is required when new machine is put into use or
use again after storing quite long time. Please lift the presser
foot and run the machine at a low speed of 1000-1500 s.p.m
for
30 minutes, then increase the speed gradually.
9 @Jnstamng the needie (Fig.9)
-4-
Tum the balance wheel to lift the needle bar to its highest
position, loosen the
needle sei screw, and make the needle
groove to the left side of the operator, then fully insert the
needle shank until to the bottom of the needle
bar socket,
tighten the set screw. (Fig 9a)
Note:Insufficient insertion (Fig. 9b)orthe needle groove facing
to the operator (Fig. 9c) is incorrect.
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rdination among the ne le,
thread and maieria~s
The needle thread should be left-twist, holding the thread by
left hand, twist it by right hand at certain direction (shown as
Fig. 10),
if it changes .into tight, it's left-twist, contary, it's
right-twist.
Please use DP x 17 16" ~ 18" needle, The needle size should
depend on the materials to
be sewn. If the thin needle is used
for sewing heavy materials, the needle will be broken easily,
and will also cause skip and thread broken. On the contrary,
the materials will be destroyed for the big needle hole, so,
please select proper needle
and thread according to the
materials.
i 4.Threading the need~e thread (Fig.i i)
Tum the balance wheel to lift the thread take-up to its highest
position, then threading the thread from the thread stand.
Threading order as Fig.ll: upper cover thread guide A-lihree
-hole thread guide B-lihread tension disc C--1>spring guide
disc D--l>spring
E-lihread guide (upper) f--J>thread take-up G
-?thread guide (upper) F----'cthread guide (middle) H-----1>thread
guide Qower) 1-----J>needle bar thread guide J-----J>needle K.
When drawing the bobbin thread, holding the tip ofthe needle
thread by hand,thru the balance wheel to lower the needle bar,
then lift it to its highest position. Pull the needle thread and
the bobbin thread ·will be draV\rn up accordingly, finally, put
ihe tipe
of the needle thread and bobbin thread toward front
under the persserfoot.
15.Adjusting the tension of bobbin thrread and needle thread (Fig. 12)
The tension of needle thread and bobbin thread should be
suitable.
The stitch form shown as CD is the best.H the tension
is tightened or loosened, the abnonnal stitch form will be
caused shown as (2), ®
1. Adjusting the tension of bobbin thread.
The tension of bobbin thread should be adjusted according to
the materials:
CD Turn the balance wheel by hand to lift the thread take-
up to its highest position;
(2) Take down the sliding plate, the screw A is shown as
Fig. 12 (1);
@ Turn the screw A clockwise to increase the tension of
bobbin thread;
@ Tum the screw A counter-clockwise to decrease the
tension of bobbin thread;
OCD
x®~~~~~~~
><®~~~~~~~
i 1
12
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(3)
(2)
Standard clearance 8mm
tlffl---+-- A
'P'AL--1-- B
(4)
2. Adjusting the tension of needle thread
(1) Adjusting the pressure on the thread tension disc:
Adjusting the pressure
on the thread tension disc to change
the tension of needle thread.
As Fig. (2), turn the nut A
clockwise
lo increase the pressure, on the contrary, to
decrease the pressure.
(2) Adjusting the tension of spring
Light materials 20g
Normal materials 25g
Heavy materials 30g
The method ofadjustment as Fig. (3):
Loosen the nut A, tum the spring shaft counter-clockwise to
increase the tension, contrary,
to decrease the tension. Please
use a screwdriver to rotate the spring shaft to get the
required tension.
(3) The swing range of the spring
The spring must he able
to swing, when the thread take-up
is at its highest position, the normal swing range ofthe thread
take-up spring should be:
Light materials
Normal materials over 8mm
about8mm
Heavy materials less 8mm
The method ofadjusting swing range: as Fig (4)
d) Loosen the presser foot lifter;
(2) Loosen the screw A;
® Tum the disc B counter-clockwise to increase the
swing range, contrary, the swing range decrease.
((;) Tighten the screw A.
i tEL Winding the bobbin thread and adjustment (Fig. i 3)
13
A
D
E
The bobbin thread should be neat and tight. If the thread
is weak, please increase the tension of the thread tension
disc
A; if the thread is not neat, please move the bracket C
to adjust it. First, loosen the screw B, if the thread is wound
to one side as Fig
<2), move the bracket rightward; if it is as
Fig ®, please move the bracket leftward until the thread is
wound neatly as Fig. CD, then tighten the screw.
Cote: Nylon or polyester thread should be wound under light
tension in particular,otherwise the bobbin D might be broken
or deformed.Please don't overfill the bobbin thread,otherwise
the thread will loosen dovm from the bobbin. The optimum
capacity of bobbin thread is fill about
80% of bobbin outside
diameter, and this can be adjusted by screw K
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, forward and backwa
Tum the stitch length regulating nut to adjust the stitch length.
When
the graduation on the stitch length regulating block is
aligned with the figure
on the stitch length graduation plate,
the figure is the stitch length
(mm). Lift the reverse feed lever,
the feeding is reverse, release the lever, the machine recovers
normal feeding again.
ed (Fig" 14)
ro 0 o
St1tch length ,-,
regulatmg block --~
f
i4
Stitch length
~±------- regulating nut
-- Reverse ieed
lever
-::7--'>---Stitch length
graduation plate
i 8" Adjusting the presser froot pressure (Fig"i 5)
Adjust the presser foot pressure according to the materials.
Please increase
the pressure when you sew heavy materials.
Adjust the screw as Fig. 15, first, loose the nut A, then tum
the sc1·ew B clockwise to increase the pressure, contrary,
decrease
the pressure. After the proper pressure is got, tighten
the screw A. Turn the screw C, the pressure can be lightly
adjusted.
Counter-clockwise Clockwise
;J?l ~
~
19"Adjusting the amount of presser foot iiH (Fig. i 6)
The method of adjusting the amount of presser foot Mt during
the sewing is:
Loosen the nut A, adjust the center distance B between the
screw A and
upper feed shaft, adjust the distance B short to
increase
the amount of presserfoot lift, contrary, decrease the
amount.The amount should be adjusted within a certain range,
and should not be adjusted too large. After adjustment, tighten
the screw,turn the
upper shaft to check if there is any collision,
begin to use when everything goes well.
-7-
B
I
A
15
16
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i.2mm
0.05mm
17 I 20.Adjusting the timing of feed
1. Standard position
The needle should align with the needle hole center on the
feed dog, please adjust the upper feed shaft cam
to adjust the
timing of feed.
2. Installing the feed cam
First,adjust the stitch length
to zero, and open the upper cover,
tum the balance wheel counter-clockwise by right hand, the
second screw on the feed cam should align with the groove on
the upper shaft.
21 .Adjusting the timing between the
needle and hook(Fig. 17)
The position between hook and needle should be set as
following order. Lift the needle up
to l.9mm from its lowest
position,the tip of hook should be straight
to the needle center
line, and there is about
2.lmm distance between the tip of
hook and upside of needle hole.
If the position is wrong,please
loosen the screw
A, move the needle bar up and down until it
is on proper position, then tighten the screw. When adjustmet,
also please notice the lateral clearance between the tip ofhook
and needle,the proper clearance between the bottom ofneedle
gap and the tip of hook is 0-0.5mm.
22Jnstamng the hook positioning
bracket and hook (Fig.18)
1. Installing the hook positioning bracket
When installing the hook positioning bracket A, the flange of
the bracket should enter into the hollowness of hook inner
head
B, and there is a clearance of 0.5-0.7mm.
2. Installing the hook
Lift the presser foot and the needle bar to its hightest position,
open the bed cover,unscrew the four screws of hook positioning
bracket, then
tum the balance wheel and loosen the two set
screws D, finally, pull the hook out slowly, together with the
positioning bracket. Install the hook in the reverse order thai
the hook is taken down.
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p
.
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33-l ~
1
34--J: .
35 @3
-9-
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i ,Machine body
Ref. NO. Parts No.
Name of parts Qty. Remarks
1 49WF2-004
Face plate 1
2 49WF2-005
Screw for face plate 1
3 49WF2-006
Pin for face plate 1
4 37T4-422
Back cover 1
5
13WF2-010
Screw for back cover 2
6
49WF2-023
Cylinder 1
7
16WF2-038
Oil stopper plate 1
8
16WF1-059
Screw 1 SM9/64" x
40
9
49WF2-011
Upper plate 1
10
49WF2-013
Upper sheet plate packing 1
11
49WF2-008
Thread take-up cover 1
12
49WF2-009 Screw 1 SMll/64" X 40
13
49WF2-020 Pin 1
14 49WF2-019
Lubrication dial 1
15 17T5-016 Set screw 1 SM15/64" X
28
16 49WF2-018 Spring 1
17
49WF2-017
Lubrication dial stud 1
18
49WF2-014 Oil gauge window l
19 49WF2-012 Screw 7 SM9/64"
x40
20
49WF2-015 Spring plate 1
21
49WF2-012 Screw 1
22 7KT2-020
Washer 1
23 16WF3-014
Screw 1 SMl/8" X 40
24 49WF2-016
Oil adjusting collar 1
25 49WF2-003
Base 1
26 49WF2-'010 Oil pan 1
27
22WF2-006 Screw assembly 1
28
37T4-411 Spring washer 1
29
37T4-409 Connecting hcok 1
30 22WF2-020
Screw 1 SM!/4" X 28
31
37T4-407
Hinge 1
32 22WF2-004
Screw 6 M6xl
33 Screw 4
M8 X 75 GB68-85
34 Washer 4
GB96-85-8
35 Nut 4
GB41-86-8M
36 49WF2-021
Oil pipe l
37 Oil wick 1
38 16WF2-053
Logo label 1
39 Rivet 4 GB827
-86 2.5 X 5
40 lKTl-005 Waming label 1
41 49WF2-034
Model label 1
42 4KT1-005
Series number label 1
43
35WF1-054
Rivet 2
44
49WF2-036
Safety cover 1
45 13WF1-045
Screw 2
'
. ---
~- -
-~-
----~~~
-~
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"Upper shaft arnd ~hread ~ake~up mecharnism
1 4
s-LPf
6
20~
18 i 9
~~ ~-~
-~ .. ~
~
I
'
I
!
I
16
17
7
-11-
33
~
' I
hS
I I
I
I
I
I I
,_,
I 1
I I
I I
I I
I I
I 1
· I I
w
37 38
I
I
32
34
\
35
36
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"~
Ref. NO. Parts No.
Name of parts Qty. Remarks
1
49WF1-005
Thread take-up 1
2
49WF1-003
Thread take-up pin 1
3
49WFI-004
Screw 1 SM17/64" x 32
4 Oil wick 1
5 16WF1-013 Thread
take-up slide block 1
6 Oil 1
7
16WF1-014
Needle crank rod 1
8
49WF1-006
Rubber cap 1
9 Oil wick 1
10 16WF1-015 Needle bar crank pin 1
11 16WF1-016 Set screw 1 SMl/4" x 28
12 16WF1-017 Screw 1 SMl/4" x 28
13
16WF1-019 Ser screw 1 SMl/4" x 28
14 16WF1-018 Needle crank 1
15
16WF1-020 Screw 1 SMl/4" x
28
16
22WF2-049 Screw 1 SM5/16" X
28
17
Oil wick 1
18
16WF1-021 Washer 1
19 22WF1-053 Upper shaft bush
(L)
1
20
I
16WFI-025 Felt 2
21
49WF1-007 Upper shaft 1
22 49WF1-G08 Upper shaft bush (M)
1
23 16WF1-004 Screw 1 SM17/64" x 32
24 16WF1-025 Felt 1
25 49WF1-012 Upper shaft collar 1
26 22Wfl,..Q48 Screw 2 SMl/4" X 28
27
49WF1-013 Upper shaft bevel gear l
28 49WF1-014 Screw l SMl/4" X40
29 49WF1-015 Set screw 1 SMl/4" X40
30
49WF1-009
Upper shaft bush 1
31 16WFI-004 Screw 1 SM17/64" X32
32
49WF1-010 Felt 1
33 49WF1-011 Small felt 1
34 16WF1-056 Screw 1 SMl/4" X32
35 22WF1-008 Ring 1
36 BWFl-077 Set screw 1 SM15/64" X 28
37 13WF1-078 Screw 1 SM15/64" X28
38 16WF1-035 Pulley 1
39 16WF1-040 Screw 1 SMll/32" x 28
40 49WF1-017 Screw 1 SM9/64" X 40
41
49WF1-016
Gear cover (U) 1
_j
-12-
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I
__,.
w
I
74 ~
~
~J
I
73
2s---€'b I
27=-rr
3
82
I
3B
~45
From the library of: Superior Sewing Machine & Supply LLC

r foot mechanism
Ref. NO.
Parts No.
Name
Of parts Qty. Remarks
Ref. NO.
Parts No. Name
of parts Qty. Remarks
1 49WF5-006
Inner presser foot vertical cam
l
43
22WF1-003
Screw
1 SMT7/64" x 32
2 22\JI'F4-002
Set screw
2 SMl/4" X 40
44
49WF1-002 Needle bar thread guide l
3 Needle bearing
l
45
Needle 1
DPx 17 16#
4
22W.F5-021
Eccentric wheel connecting rod
1 46 49WF3-004
Pressure adjustment screw(small) 1
5 22WF5-025
Screw 2 SM7/32" X32
47
49WF3-001
Pressure adjustment screw(big) 1
6 22WF5-024
Collar 1
48
49WF3-002
Screw
1
7 22WF5-020
Nut 1 49 49WF3-006
Spring pin
1
8 22w.F5-019
Collar 1 50 49WF3-005
Spring
1
9 16WF2-023
Washer
1
51
22WF3-005
Presser bar
1
10 22WF5-018 Stud screw
l
52
49w.F3-003
Spring
1
11 22WF5-017 Crank
1 53
22WF3-007
Presser bar lifter
1
12 16Wf3-030
Clamping screw
1 SMl/4" X
28 54 16WF2-033
Screw
1 SMll/64" x 40
13
22WF5-013 Upper feed shaft hush
1
55
49WF3-009
Roller screw
1
14 22w.F5-012
Upper feed shaft
1 56 49WF3-010
Roller
1
15 22w.F5-013 Upper feed shaft bush
1 57 22WF3-009
Thread release plate
1
16 22WF5-016 Nut
1
58 22WF3-008
Thread release spring 1
17 22WF5-015
Pin screw
1 59 16w.F4-021
Presser bar guide
1
18 Oil wick
1 60 16w.F4-022
Screw 1 SM9/64" x40
19 22WF5-014
Link
1 61 l6w.F3-025
Setscrew
1 SM17/64" X
32
'
20 22WF5-026 Swing plate 1 62 49w.F3-007
Presser bar bush
1
I
21 49WF5-009
Pressure adjustment screw 1 SMS/16" x 24
63
22w.F3-014 Set screw
1 SM9/64"
x40
22 22w.F5-031 Spring rod
1 64 49WF3-015
Outer presser foot
l
23 49WF5-007 Spring
1
65
6K2-042 Screw
1
M6x 1
24 22WF5-028
Link
1 66
49VITF3--D08 Presser bar guide shaft
1
25 22WF5-009 Slide block 1 67
22WF3-0ll
Screw 1 SMl/4" X28
26 22WF5-029
Inner presser foot bar 1 68 22w.F3-010
Presser plate 1
27 49WF5-008 Iru~er presser foot
1 69 22WF3-012
Pin 1
28 22w.F5-033 Screw
1 SM5/32" x40 70 16W4F-001
Pin screw 1
29 16WF1-0ll
Screw 1 SM17/64" x 32 71
16W4F-002
Presser foot lifter 1
30 22w.F5-002 Rocking frame shaft
1 72 49WTI-011
Thread release guiding plate 1
31 Oil wick
1 73
49WF3-012
Screw 2 SMIS/64" x 28
32 22WF5--D03 Bridging plate l 74 49WF3-014
Screw 2
M5x0.8
33 16WF1-059 Screw 2 SM9/64"
x40
75 49WF3-013
Stopper block
1
34 6K2-019 Screw 2
M4x0.7 76 22w.F3-002
Presser foot lifter lever
1
35 221'1-007 Washer 2 77 22WF3-001
Presser spring
1
36 49WF5-001 Guide plate 1 78 16WF3-059
Screw
1 SMl/4" X
28
37 22WF5-001
Nee(lle bar rocking frame
1 79 22w.F3-004
Nut
2
38
Oil wick
1 80 22WF3-003
Set screw
1 SM15/64" X
28
39
Oil wick
1
81
22w.F3-015
Stopper
1
40 22WF1-004
Connecting stud
1 82 49w.F5-010 Oil wick set ring
1
41
16WF1-009 Screw
l M4X0.7
83 49\JI'F2-012
Setscrew
l
42 49w.Fl-001
Needle bar
~~~~-=-~
~.· ~~~
·~~~-=-====--~~-. ~===-~- ~-~~'="'
~
~14-
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6---1
7
. ---------- ---------- ·r
---------- .
I
~ ---------- ---------- ---I I
, ---------- I )
L- ----------- : .
. - - I ----------
~ I _ _-
: -----r--
21 ,__--
20 ~ 22
From the library of: Superior Sewing Machine & Supply LLC

--
Ref. NO.
Parts
No.
Name of parts Qty. Remarks
1
49WF1-019
Vertic.al shaft gear (U) 1
2
49WF1-020
Set screw 2 SMl/4" X
40
3
49WF1-023
Vertical shaft bush (U)
1
4 16WF3-025 Set screw 1 SM17/64" X 32
5
49WF1-025
Felt 2
6
49WF1-018
Vertical shaft 1
7
49WF1-024
Vertical shaft bush (L) 1
8 16WF1-004 Set screw 1 SM17/64" X 32
9 49WF1-021 Vertical shaft gear
(L)
1
10 49WF1-020
Set screw 2 SMl/4" X
40
11 49WF1-027
Lower shaft gear 1
12 49WF1-015
Set screw 2 SMl/4" X 40
13 49WF1-030
Lower shaft bush (B)
1
14 49WF1-031 Felt 1
15 16WF1-004 Screw 1 SMl7/64" X 32
16 49WF1-032
Lower shaft collar 1
17 7KT3-026 Screw 2 SIVHI/64" x 32
18 49WF1-026 Lower shaft 1
19 49WF1-029
Lower shaft bush (A)
1
20 Bobbin case 1 SC39-14
21 49WF1-033 Bobbin 1
22 Rotary hook 1 KR69-V
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From the library of: Superior Sewing Machine & Supply LLC