TH-2B
Operating
Instructiona
*
*********
• *
* T H - 2 B
* *
* T H - 6 B *
* • *
* T H - 7 B *
* *
* T H - 8 B *
*************
SEIKO
SEWING.
MACHINE
CO.
From the library of: Superior Sewing Machine & Supply LLC
Contents
1
Lubrication
2.
2
Setting
the
needle
2
3
Thre
ad 2
4
Removal
and
insertion
of bobbin ' 3
5 Winding
the
bobbin
thread
4
6 Needle
threading
5
7 Tension
of
bobbin
thread
and
needle
thread
5
8 Pressure of
presser
foot
7
9 Adjustment of
stitch
length
7
10
Determination
of
positioning
for
stitch
length
at
forward
and backward amount 7
11
Timing
of
thread
tension
releasing
mechanism
..i.......
8
12 Removal
shuttle
hook 9
13
Adjusting
on
the
each
points
g
(A)
Adjusting
needle
position
against
needle
hole
of
feed
dog. (7B &
8B
Types) 9
(B) Adjusting the
height
of feed dog 10
(C) Adjustment
for
timing
of
feed
dog-rise
10
(D)
Adjusting the forward and backward
position
of
needle
bar
frame
10
(E) Timing of
needle
and hook
®
Positioning
between the
upper
side
of
needle
eye. 11
®
Adjusting
the
height
of
needle
bar
11
® Adjusting the
position
of the
tip
of
hook
11
® Adjusting the clearance
between
needle
and
the
tip
01
hook
12
®
Determination
of
the
position
of
needle
bar
rock
frame
for
7B & 8B
12
® Each
timing
for
up/down moving amount
of
presser
foot
(2B &
8B
only)
I3
From the library of: Superior Sewing Machine & Supply LLC
Specification
for
Model
TH
Types
Max.
Sewing
speed:
Needle:
Feed
mechanism:
Presser
lift:
Needle
bar
stroke:
Bed
size:
Working
space:
Use:
800
(s.p.m.)
,
Sewing
speed
may
be
changed
by
the
models
and
applications.
DD
X
1,
BY X 1
(forTH-2B)
(8B)
Alternating
pressers
(7B)
Flat
presser;
(6B)
Roller
or
flat
presser
(2B)
Alternating
pressers
20mm
(10mm
by
lever)
56™"
253inm
x
656mm
180mm
X
400mm
Suitable
for
sewing
of
extra
heavy
materials
such
as
shoeSf
bagSt
leathert
sproting
goods
and
thick
fabrics*
From the library of: Superior Sewing Machine & Supply LLC
1
Lubrication
Lubrication
all
points
indicated
by
arrows
in
figures.
- 1 -
From the library of: Superior Sewing Machine & Supply LLC
Setting
the
needle
Tii-rn
+hP
balance wheel over tov/ard you
until
the needle
"bar
ita
hisLst
Mint.
Loosen
the
needle
clamp
sorew(l).
Sold
Ind
insert
the
Ledle(2)
into
the
needle
bar
hoi®
"P
as
deeply
as
it
will
go,
keeping
the
long
groove
of the
needle
to
the
left
and
tighten
the
set
sorew(l)
securely.
3
Thread
The
needle
thread
should be
used
the
left—twisted
thread
only»
the
bobbin
thread
can be
used
either
left
or
right
twisted
To
find
out
thread
twist,
hold the
thread
as
shown
by
illust
ration,
and turn the thread over toward
you
between the
thumb
and
forefinger
of
right
hand,
and
then
left-twisted
thread
will
wind
tighter
strands,
and
right-twisted
thread
will
unwind.
- 2 -
From the library of: Superior Sewing Machine & Supply LLC
4
Removal
and
insertion
of
bobbin
ORemoval
of
bobbin
Open
the
bed
slide,
then observe the
hook
position (as
shown
figure)
and
drop-do^
the needle
bar
at
lowest
point,
then
apring(l)
and
bobbin
caseu)
and
depress
the
snap
spring
and
pull
up
the
bobbin
case
outward and
take
the
bobbin
out
of the bobbin
case.
•
b
- 3 -
From the library of: Superior Sewing Machine & Supply LLC
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