0 NEEDLE
AND
ROTARY HOOK
TIMING
ADJUSTMENT
• Be sure to check the
pos1t1on
detector adJustment (p.43) after the needle and rotary hook
t1m1ng
1s
adJuSted.
1 . Needle to rotary hook point
gap
Needle
Rotary hook pomt
Needle guard
0-0.15
mm
1. Loosen the
screws@.®
and©.
and move the rotary-hook base 0 to the
right
or
left until the clearances between the
needles and rotary-hook
t1ps
are about
0.05
mm.
2. Adjust the engagement
of
the spiral gear
f)
by adjusting the clearance between the inner side
of
the rotary-hook base 0
and the end face
of
the
sp1ral
gear
f)
to about
0.2
mm
by moving the spiral gear
f)
to the
nght
or
left.
•
Tighten the screws
©for
the
sp1ral
gear
f)
in such a way
as
not
to
change the contact.
• The needle
guard
on the rotary hook
is
to prevent needle to rotary hook
point
contact. Be sure to readjust the needle
guard position
when
the rotary hook
is
replaced.
2.
Needle bar
rise
and height
* Needle bar rise spectf1cat1ons vary
w1th
d1fferent models. Use the followmg table to
adJUSt
the
r1se.
The gap between
reference marks is 2.4 mm.
Models-8831 ·
8832
·
8835
·
8836
·
8882
Model
R1se
Feed dial
Application
Standard
Thread cutter Standard
Thread cutter
Thin materials
SynthetiC threads 2.6
mm
----
2
~
----
118-831
Regular materials
2.4
mm
--
2
~
-------
Th1ck materials
2 4
mm
-
3
--------
Thin materials
Synthetic threads 2 6
mm
-
2
--------.___
118-832
Regular materials
2.4
mm
2.4
mm
2
0
Thick
materials
2.4
mm
2.4
mm
3 0
118-835
Regular materials
2.4
mm
2.4
mm
3
0
836
118-882
Regular
matenals
2.4
mm
--
3
~
--
Needle bar nse should be set
to
2.4 mm on machmes
with
wh1ch a thread cutter
1s
used .
•
•
When
adjusting the walking bar feed regulator dial on model
B831.
press the feed regulator button and align the
machine
pulley scale
with
the red dot.
-29-
From the library of: Superior Sewing Machine & Supply LLC
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