JUKI LK-1941 Manuel D'utilisation page 52

Kinds and application of the hook
There are four kinds of hooks for LK-1940 Series. It is necessary to use the hook properly in accordance
with the needle size and sewing conditions.
Use a suitable hook referring to "Correspondence table of needle size" and "Correspondence table of
sewing conditions" described below.
In addition, the needle sticking (needle stuck into needle thread or needle stuck into bobbin thread) occurs
due to the kind of thread or stitching direction. Then "hangnail", "thread breakage", or "stitch skipping", may
occur. In this case, such problem can be solved by making the needle tip round as an emergency measure.
However, when replacing the needle with the ball-point one, refer to the table below since the needle guard
amount may be changed.
[Correspondence table of needle size]
(Symbols, H, G, and Z in the table denote the combination of the types at the time of delivery.)
ORGAN needle (standard needle point)
Needle size
Kind of hook
Lubricating hook A (14436554)
Lubricating hook B (14436703)
Lubricating hook C (14436307)
Lubricating hook D (14436158)
ORGAN needle (ball-point)
Needle size
Kind of hook
Lubricating hook A (14436554)
Lubricating hook B (14436703)
Lubricating hook C (14436307)
Lubricating hook D (14436158)
SCHMETZ needle (standard needle point)
Needle size
Kind of hook
Lubricating hook A (14436554)
Lubricating hook B (14436703)
Lubricating hook C (14436307)
Lubricating hook D (14436158)
: Perform the hook adjustment with the standard engraved line.
○
: Perform the hook adjustment with the sub engraved line.
●
[Correspondence table of the sewing conditions]
Lubrication hook A (14436554)
Lubrication hook B (14436703)
Lubrication hook C (14436307)
Lubrication hook D (14436158)
The combination of the different kinds of outer and inner hooks can be used under the
special sewing conditions.
(Example) Baloon stitch occurs when the lubricating hook D is used under the conditions
40
#18 #19 #20
H ○ ○ ○
●
●
#18 #19 #20
○ ○ ○
●
#110 (18) #120( 19) #125 (20) #130 (21) #140 (22) #160 (23) #180 (24) #200 (25)
○ ○ ○
Feature of hook
Thread path presser is long.
Thread path presser is short.
of ORGAN needle #24 + (plus) cotton thread -> Use the outer hook only of
lubricating hook A or B.
#21 #22 #23
○ ○ ○
○ ○ G ○
● ●
#21 #22 #23
○ ○ ○
● ●
○ ○ ○
● ●
Standard
engraved line
Sewing conditions
When baloon stitches frequently occur due to
violent movement of thread at the time of passing
the hook in case of thin thread or cotton thread.
When thick thread is used and thread tightness is
required.
#24 #25 #26
○ Z Domestic ○ Z Export ●
#24 #25
○ ○
● ○
●
Sub engraved
line