Singer 211G146 User manual

Service
Manual
Form 30-289 G/i073-894
Printed in West-Germany
SINGER
INDUSTRIAL PRODUCTS
146
151
157
158
351
357
358
451
457
651
657
658

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USE 5 I NG E R* 0 I LS
and LUBRICANTS
They insure freedom from lubricating trouble and give
longer life to sewing equipment
The Following are the correct lubricants for this machine:
TYPE A -MANUFACTURING MACHINE OIL, LIGHT GRADE
When an oil is desired which will produce a minimum of
stain on fabrics, even after a long period of storage, use:
TYPE C -MANUFACTURING MACHINE OIL, LIGHT GRADE
OTHER SINGER* LUBRICANTS
TYPE E -THREAD LUBRICANT
For lubricating the needle thread
of sewing machines for stitching
fabrics
or leathe.r where a thread lubricant is required.
TYPE F - MOTOR OIL
For oil-lubricated motors and plain bearings in
power tables and
transmitters.
NOTE:
All the above oils are available in 1 quart and 1 gallon
tins and 5 gallon drums.
GEAR LUBRICANT
-
This specially prepared grease is recommended for gear lubrica-
tion on manufacturing sewing machines.
• A Trademark of THE SINGER COMPANY

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Form
30-289
G/1073-894
SINGER
Service
Manual
MACHINES
211G146,
211G151
AND
211G157,
158,351,357,358,451,457,651,657,658
*A
Trademark
of
THE
SINGER
COMPANY
THE
SINGER
COMPANY
Copyright©
1965
by
The
Singer
Company
Copyright
under
International
Copyright
Union
All
Rights
Reserved
under
Inter-American
Copyright
Union
Printed
in
West
Germany

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CONTENTS
DESCRIPTION ................................. 3
INSTALLATION ................................ 4
LUBRICATION ............................... 4-5
OP ERA TOR INFORMATION ...............•.... 5-9
ADJUSTMENTS ............................ .9-16
INDEX
Arm Shaft Connection Belt Replacement ........... .16 lnstal lat ion ................................•.. 4
Bobbin Case Opener, Adjusting .................. 14 Lubrication .................................... 4
Bobbin Case Opener, Timing .................... 14 Needles ....................................... 5
Bobbin Case, Removal From Sewing Hook ......... 13 Needle Bar Bushing (21 lG 146) ................... 10
Bobbin Removal ................................ 7 Nedle Bar Height (21 lG 146) ..................... 10
Bobbin Replacement ............................ 7 Needle Bar Height (211G151 & 211G157) .......... 10
Bobbin Thread Tension .......................... 8 Needle Bar Position Relative to Presser Bar ...... 10
Bobbin Winding ................................. 7 Needle Bar Rock Frame Removal ............•.... 16
Description of Machines ......................... 3
Needle Setting ......................•......•... 6
Feed Dog Adjustment ........................... 15
Needle Thread Tension .......................... 8
Feed Eccentric Adjustment ...................... 15
Pressure on Material ............................ 9
Feed Reversing Mechanism (21 lG 157) ............. 11
Speed .............. , .....................•.... 5
Feed Reversing Mechanism
Stitch Length Regulation ......................... 9
Adjustment (211G 157 /158) ................... 11
Take-up Lever Removal ......................... 16
Hook Height ................................... 12
Thread Controller ............................ .8, 9
Hook Lubrication .............................. 5
Thread Tensions ................................ 8
Hook Position Relative to Needle ................. 12
Threading Bobbin Case .......................... 8
Hook Removal ...•.•.•..................... 13, 14
Threading (Lower) ......................••.....• 7
Hoak Ti ming ............................•..... 13
Threading (Upper) ............ , ...............•. 6
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The Singer 211Gl46, 211G151 and 211Gl57 are high speed, single needle,
long arm, precision lock stitch machines, designed for top performance on a variety
of medium to heavy weight fabrics.
GENERAL FEATURES
Vertical axis hook with metered lubrication. Hook
can be removed without disturbing hook shaft.
Safety clutch, adjustable to sewing conditions, to
prevent hook damage during occasional strain.
Fully automatic lubrication to all moving parts
from two reservoirs enclosed in the machine.
Thread lubricator reservoir, inside face plate,
filled through oil hole without disturbing face plate.
Adjustable feed driving eccentric located on hook
driving shaft, produces a uniform stitch length at
all speeds.
2
Oil reservoir 1n hook saddle permits controlled
lubrication to bobbin case, bobbin case opener mech-
on ism and hook.
Arm shaft, hook shaft, and belt driven bed shaft
are mounted in boll bearings at rear and in automat-
ically lubricated plain bearings in front.
Plunger for changing length of stitch 1s on top
surface of bed.
Needle bar and needle bar driving mechanism are
lubricated automatically from oil reservoir in machine
arm.

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Sleeve
type
toke-up.
Thread
toke-up
guard.
Belt
drive.
Knee
lifter.
Needle
bar
stroke:
1-5/16
inches.
Bed:
18-3/4
inches
long,
7
inches
wide.
Space
at
right
of
needle:
10-1/2
inches.
Federal
Stitch
Type
301.
SPECIAL FEATURES
211Gl46
DROP
FEED
Primarily
for shoes and a
variety
of
leather
products.
Bal I
bearing
roller
presser.
Clearance
under
roller
presser:
1/4
inch.
Maximum
stitch
length:
6 per
inch.
21
lGlSl
COMPOUND
FEED
Ideal
for
stitching
coots,
overalls,
roinweor,
work-
clothes,
sports
outerwear
and
similar
items.
C:::-ibinotion
of
needle
feed and drop feed
prevents
s!
:::ping
of
upper and
lower
plies
of
material
during
sewing,
insuring
uniform
stitching
and even
plies.
Clearance
under
presser
foot:
1/4
inch.
(3/8
inch
clearance
available
on
order).
Maximum
stitch
length:
5 per
inch.
211Gl57
COMPOUND
FEED/REVERSE FEED
Similar
to
machine
211G151
with
addition
of
feed re-
versing
mechanism
controlled
by
hand
or
foot.
Direc-
tion
of
feed con be
reversed
at
any
time,
and at any
speed. Spring
biased
reverse
lever
resumes forward
stitching
position
immediately,
when hand or
foot
pressure
is
released.
Clearance
under
presser
foot:
1/4
inch.
(3/8
inch
clearance
available
on
order).
Maximum
stitch
length:
6 per
inch.
The 211 G 158 machine
is
the same
as
the 211 G 157
machine. the only variation
is
the fact that a stitch length
of
approx.
10
mm
can
be
obtained
with
this machine, depen-
ding on the material sewn.
The maximum speed recommended for this machine
(211
G
158)
is
1800 rpm.
The
211
G
351;
211
G 357;
211
G 358;
211
G
451:
211
G 457;
211
G
651;
211
G 657 and
211
G 658 machines
are compound feed varieties
within
the machine class
211
G.
Machine Features Max. St. Length Max. Speed
211 G 351 Large Vertical Axis Hook. All other features comply
with
211
G
151
machine. 5
SPI
= 5
mm
2,700 RPM
211 G 357 Large Vertical Axis Hook. All other features comply
with 211 G
157
machine. 6
SPI
= 4.2
mm
2.700 RPM
211 G
358
Large Vertical Axis Hook. All other features comply
with 211 G
158
machine.
2½
SP/=
10
mm
1.800 RPM
211 G 451 Underbed Thread
Trimmer
with Thread Wiper.
All other features
comply
with
211 G 151 machine.* 5
SPI
= 5
mm
4,000 RPM
211 G
457
Underbed Thread
Trimmer
with
Thread Wiper.
All other features
comply
with 211 G 157 machine.* 6
SP/=
4.2
mm
4,000 RPM
211 G 651 Large Vertical Axis Hook; Underbed Thread
Trimmer
with
Wiper.
All other features
comply
with
211 G 151 machine.· 5
SPI
= 5
mm
2,700
RPM
211 G 657 Large Vertical Axis Hook; Underbed Thread Trimmer
with
Wiper.
All other features
comply
with 211 G 157 machine.* 6
SPI
= 4.2
mm
2.700 RPM
Large Vertical Axis Hook; Underbed Thread Trimmer
with
Wiper.
211 G 658 -
All other features
comply
with 211 G 158 machine.*
2½
SPI
=
10
mm
1.800 RPM
For machines with UTT. Service Manual Form No.
30-349G
should
be
used
as
supplementary literature.
• these machinesare
not
equipped
with
the automatic needle thread lubrication.
The lubricating pad has to be soaked manually if needle thread
is
to
be
lubricated. 3

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DRAIN
OIL
JAR
STOP
Fig.
2.
Installation
View
ROD
INSTALLATION
Fasten
drip
pan
to
table
with
its
left
end
even
with
left
end
of
cut-out.
Fasten
knee
lifter
bracket
in
location
shown
in
Fig.
2
Assemble
it
so
that
lifter
rod
does
not
strike
drip
pan.
Screw
slots
in
bracket
provide
necessary
adjustment.
Set
stop-stud
to
stop
the
action
of
knee
lifter
as
soon
as
presser
foot
is
raised
enough
to
trip
hand
I
ever.
Screw
drain
pipe
into
drain
hole
in
drip
pan
and
attach
oil
jar
as
shown.
LUBRICATION
All
moving
parts
are
lubricated
from
two
reservoirs
enclosed
in
the
machine.
Before
starting
the
machine,
all
reservoirs
should
be
filled
and
critical
areas
lubricated.
FILL
THREAD
LUBRICATOR
RESERVOIR
WITH
SINGER*
THREAD
LUBRICANT
"TYPE
E"-----l
ON------
WHEN
MACHINE
,___.,..
,.,,
ISRU~
OFF
WHEN
MACHINE
IS
IDLE
4
FOR
MORE
THREAD
LUBRICANT
LUBRICATING
PAD
Fig.
5.
Thread
Lubrication
Use
Singer
Oil
"Type
A"
or
"Type
C"
for
arm
reservoir
and
hook
saddle
reservoir.
Fill
machine
arm
reservoir
to
high
mark
on
oil
sight
as
indicated
in
Fig.
3.
The
machine
arm
reservoir
contains
an
oil
vibra-
ting
pump
which
releases
oil
only
when
the
machine
is
operating.
Remove
oil
gauge
as
shown
in
Fig.
4
and
fill
hook
saddle
reservoir
to
full
mark
on
gauge.
Lubricate
hook
gears
and
opener
gears
by
applying
a
generous
supply
of
oil
to
oil
holes
indicated
in
Fig.
4.
Use
Singer
Oil
"Type
E"
for
thread
lvbricator
reservoir.
Fi
II
thread
lubricator
reservoir
through
oi I
hole
in
face
plate
as
shown
in
Fig.
S.
THREAD
LU-
BRICATOR
CONTROLLER
MUST
BE
ml
WHEN
MACHINE
IS
OPERATING
AND
OFF
WHEN
MACHINE
IS
IDLE.
To
increase
thread
lubrication,
turn
con-
troller
in
counterclockwise
direction
as
shown
in
Fig.
S.

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HOOK LUBRICATION
The bobbin case raceway is lubricated by oil
pumped from the hook saddle reservoir while the ma-
chine is operating. The amount of oil received by
hook raceway is very important. To check this, first
remove bobbin case. Then with the machine running,
hold a small piece of white paper near the hook for
about 10 seconds. A distinct spray of oil should be
visible on the paper.
If there is no trace of oil or an excess of oil on
the paper, proceed with the following steps:
l. Tip machine and loosen control valve set screw
shown in Fig. 6 and return machine to upright
position.
2. Turn control valve screw shown in Fig. 7 clock-
wise for more oil; counterclockwise for less
oi I. Re-tighten control valve set screw.
A short test run of at least a minute should be
made between adjustments to insure uniform oi I flow.
After each adjustment of oil control valve screw, oil
control valve set screw should be securely tightened.
SPEED
Maximum speed for machine 21 lG 146 1s 3500
stitches per minute.
SPEED
Maximum speed for machines 211Gl51 and 211Gl57
is 4000 stitches per minute.
Maximum efficient speed 1s dependent upon the
nature of the operation, the obi lity of the operator
and the type of material being sewn.
Never run a new machine at maximum speed im-
mediately following a new installation. A speed of
500 stitches per minute less than maximum Is recom-
mended for the first 100 hours of operation.
NEEDLES
For machine 2l1Gl46, use Singer Needles, Catalog
1740.
For Machines 21 lG151 and 211Gl57, use Singer
Needles, Catalog 1901 for l/4 inch clearance under
presser foot and Catalog 3355 for 3/8 inch clearance.
Size of needle for a particular operation is deter-
mined by size of thread and type of material to be
sewn.
Orders for needles should state quantity required,
size number and catalog number.
For example:
100 Needles, Size 14, Catalog 1740
5

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1ffS:\::·
"·
":
..
'·
·;J
.,
I
SETTING
THE
NEEDLE
l.
T~•-,
machine
pulley
over
toward
you
until
needle
bar
is
at
highest
position
as
shown
in
Fig.
8.
2.
Loosen
needle
clamping
screw
3.
Insert
needle
into
needle
bar
to
highest
posi-
tion,
with
long
groove
of
needle
to
left
of
opera-
tor
and
eye
of
needle
parallel
to
machine
arm.
4.
Tighten
clamping
screw.
THREAD
Left
twist
thread
should
be
used
in
needle.
Either
left
or
right
twist
thread
can
be
used
1n
bobbin.
To
determine
thread
twist,
hold
thread
as
shown
in
Fig.
9.
With
left
hand
holding
one
end
of
thread,
twirl
other
end
with
thumb
and
forefinger
of
right
hand
over
toward
you.
If
left
twist
thread,
strands
will
wind
tighter.
If
right
twist
thread,
strands
will
unwind
or
separate.
UPPER THREADING
Turn
machine
pulley
over
toward
you
until
needle
bar
is
at
highest
position.
Pass
thread
through
threading
points
as
indicated
in
Fig.
10.
Draw
about
2
inches
of
thread
through
needle
eye
to
start
sewing.
BEHIND OIL PAD
Fig.
10.
Upper
Threading
6

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LOWER THREADING
BOBBIN REMOVAL
1. Open slide plate in bed of machine
2. Turn machine pulley over toward you until needle
bar reaches highest position.
3. Roi se bobbin latch and I ift out bobbin as in-
dicated in Fig. 11.
BOBBIN WINDING
Attach bobbin winder to table with driving pulley
in front of belt as shown in Fig. 12.
Securely place bobbin on bobbin winder spindle.
Pass thread through thread guide, then around and
between tension discs as shown. Wind thread clock-
wise around bobbin a few times as indicated in Fig.
12.
Move bobbin winder pulley over against machine
belt and start machine.
The amount of thread to be wound on bobbin is
regulated by screw B, Fig. 12. To wind more thread
on bobbin, turn screw B inward. For less thread on
bobbin, turn screw B outward. This screw should be
regulated to stop bobbin winder spindle when thread
on bobbin is 1/16 inch short of bobbin rim.
If thread winds unevenly on bobbin, loosen tension
bracket screw A, Fig. 12, and move bracket to right
or left to obtain even winding.
Adjusting knurled nut C, Fig. 12, regulates tension
of thread being wound on bobbin. For fine thread,
use light tension.
Bobbins may be wound while machine 1s stitching.
BOBBIN REPLACEMENT
Place bobbin on center stud with thread wound in
counterclockwise direction as shown in Fig. 13. Draw
about 2 or 3 inches of thread from bobbin.
LIFT LATCH_,:;;:<;- .::\,'1
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. :t~d/J~)it"'}
J,'.;\'.;,,(Jl·;'.;;; 1!111 .....
.,
7

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i
l THREADING
BOBBIN
CASE
Draw
thread
through
slot
in
edge
oi
bobbin
case
as
shown
in
Fig.
14,
then
to
the
left
and
under
pro-
jection
as
shown
in
Fig.
15,
leaving
about
two
inches
8
PULL
THREAD
THROUGH
SLOT
Fig. 14. Bobbin
Threading
(Step One)
of threaci
above
the
slide
to
start
sewing.
Close
slide,
leaving
just
enough
space
for
thread
to
pass
freely.
DRAW
THREAD
TO
LEFT
AND
UNDER
PROJECTION
,_
'
DRAW
THREAD
UP
AND
OUT
TWO
INCHES
Fig. 15. Bobbin Threading (Step Two)
THREAD TENSIONS
Tension
on
thread
should
be
as
light
as
possible
yet
sufficient
to
correctly
set
stitches
in
material.
NEEDLE THREAD TENSION
Regulate
need
le
thread
tens
ion
only
when
presser
foot
is
down.
To
increase
tension,
turn
tbumb
nut
shown in
Fig.
16,
clockwise.
To
decrease
tension
turn
this
thumb
nut
counterclockwise.
BOBBIN
THREAD
TENSION
Bobbin
thread
tension
is
regulated
by
the
screw
nearest
to
the
center
of
tension
spring
on
the
outside
of
the
bobbin
case
shown
in
Fig.
17.
Turn
machine
pulley
slowly
until
screw
is
accessible.
To
increase
tension,
turn
screw
inward.
To
decrease
tension,
turn
screw
outward.
THREAD
CONTROLLER
The
thread
controller
should
draw
up
slack
thread
before
needle
point
enters
fabric_
to
prevent
needle
from
penetrating
thread.