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BEFORE OPERATING YOUR LOCKSTITH MACHINE, PLEASE READ THIS
INDTRUCTION MANUAL CAREFULLY
IN
ORDER TO OPERATE IT IN THE
CORRECT AND EFFICIENT MANNERS.
~fT~·iS-CAUTIONS
IN
OPERATION
1.
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1.
Th
e machine should rotate counterclockwise
as
observed f
rom
the pulley. T
ake
care
not to rotate the
machine in the opposite direction.
2. Never start the machine before filling the machine base with lubricating oil.
3. Remove the bobbin case and the needle thread from the machine before performing the trial operation.
4. Clean up the sew
in
g hook and the bobbin thread trimmer every day after sewing work.
Al
so
check the
level
of
the lubricating oil.
5. Never bring your fingers
or
hair d
ose
t
o,
or
place anything on the haodwheel during operation. It
may l
ead
to
se
rious
pe
raonal injuries.
6.
1f
your machine is provided with a belt cover, fu1ger guard and eye guard, never operate your machine
with any
of
them removed.
6:
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SPECIFICATION
~~
1- '-
%
7810
7820 7830
781DK
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Application
Buttonholing
for
ordinary
cloth,
knit
,
etc
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2.
5-4mm
2.
5-5mm
2.
5-5mm
2.
5-4m
m
Buttonhole length
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6.
4-l9mm
6.4-25.4mrn
6.4-25.4mm
6.4-19mm
Bar
-
tac
k width
(1/
4" - 3/
4")
0
/4
" - 1")
(1
/
4"
- 1 1/4")
(1
/ 4" -
3/
4")
1JL
tt
DPX5 #11]-#14]
Nee
dle
&J~
P
~&
12mm
Presser
lift
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N
O.
Hf.JT*!Lnb
Lubricating
oil
From the library of: Superior Sewing Machine & Supply LLC
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