Singer 281-5, 281-6, 281-20, 281-22, 281-23 Service Manual

Form

(1064)

21315

SINGER

Service

Machines

281-5,

281-6,

281-23

and

Manual

281-20,

281-24

281-22,

Regulation View - Machine 281-24

*A

Trademarko(THE

SINGER

THE

Copyright Under International Copyright Union

All Rights

COMPANY

SINGER

Copyright ® hy The Singer

Reserved

under

COMPANY

Inter-American

Compony

Copyright

Union

Printed

In U. S. A.

DESCRIPTION

INSTALLATION

LUBRICATION

OPERATION ADJUSTMENT

PARTS

is

AND

CLEANING

3,4

6,

7-13

14-25

RearofManual

5

7

Bed-Raising

Bobbin, Bobbin

Bobbin

Bobbin Centralizing Check

Check

Cleaning

Close-Coupled

Compound

Description

Determining

Disc

Tension

Face

Federal Feed Feed Feed

Feed

Feed,

Feed

Filter

Gripper

Guard, Guard,

Hook Installation

Knee

Knife

LengthofStitch Leveling

Lint

Wiper 3

Lower

Lubricating

Lubrication

Machine

Machine Magnet

Materials

Maximum

Needle

Needle Needle

Needle

Plate

Removal and

Case,

Removal

Cose,

Threading

Case

Holder,

the

Spring,

Height

Tension

Replacement

and

Replacement

Removal

Feed

Dog 21, 22

and

Replacement

Setting

Adjustment

3, 16, 18, 20

Spring, Timing 21

Puller

Feed

of

Thread

Plate

Removal

Stitch

Bar

Eccentric

Bar

Linkage

Dog,

Centralizing

Dog,

Height

Roller,

Eccentric

Machines

Twist

Type

Hinge

Settings

Changing

Correct

Stop

Feed

Height

Screws

Available

....4,

Leveling

Synchronizing

Wheel,

Changing

(Sewing

Hook

Lubrication)

Feed

Needle

Section

Lifter

Sharpening

Thread

3, 4, 12, 13, 23

the

Feed

Threading

System

Base

Pulley

on Oil

Pump

Sewn

Stitch

Bar

Clearance

Feed

GuardatLoop-taking

Guard,

PositioninRelationtoThroat

Length

Bushing

Frame,

Height,

Stroke

Stringing

(Lower),

Setting

with

Hook,

Setting

Time

Plate

10 10

10

20

21

7, 20

24,

25

4, 13, 16

3, 4

14

22,

23 22

21,

22

22,

23

24

25

23

22, 23

25 24

3, 12, 25

20

3, 5

22, 23

10

3,

5-7

5, 6

3,

3, 4, 23

16

16, 17

3, 4

18, 19

3, 4, 13

20

14, 16

Needle

Needle,

Needle

Oil Flow

Oil

Recommended

Setting

Stop 16

Thread

Guard

Threading

Thread

Tension

Releaser

Regulator

Flow

Window

Oil Pump 7

Oil

Recommendations

Oil

Reservoir

Oil Retaining Collar 18

Oil Spray

Parts

7

Pendant

3

Presser

3

Presser

Preventing Position

Puller

Pressure

Radial

Regulator

Reservoir

Sewing Sewing

Sewing

6

Sewing Sewing

Side-Wheel

3

SpaceatRightofNeedle

Speed

5

Stitch

15

Stitch

Stop

Stringing

Synchronizing the

Take-up Lever

Tension

Thread

5

Threading,

3

Threading,

7

Thread

4

Timing 18-25 Timing-Indicator

16

Thread

Top-Driven

Trimming Knife,

Pattern

Charts

Link

Feed

Bar

Height,

Bar

Lift....

Foot

Pressure,

Unauthorized

Finger,

Feed

of

Settings

Roller

PositionofSewing

Button

(Stitch

Hook

Clearance

Hook

Filter

Hook

Lubrication

Hook,

Oiling

Hook,

Timing

Puller

Feed

Recommendations

Length,

Screws

Maximum 3, 4, 23

Preventing

Regulation

(Feed

the

Needle

Setting

Adjustment

ChangesinStitch

Pressers

Hook 18

Length)

with

Needle,

Setting

Screw

Wick 6

Unauthorized

Eccentric)

Guard 20

RearofManual

Length

3, 4,

Changes

Feed

Movement

of Check Spring, Adjustment 31

Lower 10

Upper 8, 9

Tensions

Twist,

Determination

Gripper

Feed

Setting

Trimming Margin 3, 14

Upper

Threading

Unauthorized

V-belt

Vertical

Wick,

Sewing

ChangesinStitch

Trimmer

Hook

Length,

Preventing

12,

4, 12,

3, 8

24

3,

3, 5

23

3, 4,

23

11

13 19

24,

25

11

12, 13

3,

18, 19

18

24,

25

3, 7

13

12, 13

23

35

31

11

17, 18

3, 12, 25

15

8, 9

13

3,

13,

15

8

3

9

6

3

5

6

3

7

3

6

TO

ALL

The improper

(all

of which

in any way

WHOM IT MAY

placing

ore

duly

whatsoever

CONCERN:

or renewal of the Trademark SINGER* or any other of the Trademarks of The Singer Company

Registered

outside

Trademarks)

a SINGER

factory

on any

or on

machine

authorized

that

SINGER

has

been

repaired,

agencyisforbidden.

rebuilt,

reconditioned,oraltered

DESCRIPTION

OF

MACHINES

Machines of

Class

281- are high

speed,

single

needle, lockstitch machines designed for sewing ma

terials ranging

Among

the

from

varieties

light weight to heavy weight.

covered

in

this

manual

are

puller-feed and needle-feed machines, top-gripper

machines and machines that perform simultaneous

trimming and

stitching.

All of these machines produce outstanding straight

line stitching in a wide range of wash-and-wear, syn

thetic

and

natural

Generol

Features

Federal stitch type 301.

Balanced, air cooled, rotating hook. Horizontal

fabrics.

Machine

Varieties

281-5,

Vertical

Trimmer

Medium weight and heavy weight

Needle

Presser

Knife bar

Maximum

stitches Needle, Bed-raising

plate.

bar

stroke,

bar lift,

stroke,

stitch

per

Catalog

1-13/64

5/16

inch.

5/16

inch.

length, with regular

inch.

1515 {16x95).

plate

sets

Regularly fitted to trim ing. Extra cutting bar and

3/16

inch.

When

specified

for

1/16, 3/32, 5/32, 3/16 or 1/4 inch

Extra cutting bar and instance

When

two

will be next

1/4 inch (widest trim

setsofthis

Speed, 5000

on order,

size

stitches

presser

size

will be supplied with machine.

per minute.

fabrics.

inches

flush

with

1/8

inch from line of

presser

machines

foot furnished in

larger than

margin)

fittings,

top

of

5-1/2

throat

stitch

foot supplied for

can be

trim

fitted

margin.

each

that

ordered.

is requested,

Lint

wiper

keeps

lint and

abrasive

matter from ac

cumulating on hook.

Drop feed

consists

of pendant link feed with feed

leveling hinge pin.

Pendant link feed mechanism maintains longer feed

ing

cycle.

Three plain superfinished bearings support the

arm

shaft.

Fully automatic lubricating system with oil flow

window in

direct

view of

operator.

Knee lifter mechanism integral with machine base

and

oil

reservoir.

Independent light fixture mount.

Improved

ling

Machinepulley 147139 for

Space

needle

ports.

at right of

thread

Disc

tension.

needle,11inches.

guard

3/8

and

other

inch V-belt.

thread

hand

Mochine 281-6, Top Gripper

Collar and cuff operations on light weight to

weight

fabrics.

Top driven gripper feed. Top feed intermittently

driven by linkage actuated through countershaft. Countershaft driven by eccentric on arm shaft.

Eccentric

adjustable

to obtain optimum

relationship

between top and bottom feed. Top feed designed to

grip fabricatsame

to

moke

contact

during

its entire

feed then returns (in

moment

and

to

front

to rear feeding

raised

that

travel

bottom feed

with

position

bottom

motion.

above ma

terial) to beginning of next grip-feeding movement.

Needle Presser

Maximum

stitches

Needle,

Speed, 5000

bar

stroke,

bar lift,

1-3/16

3/16

inches.

inch.

stitch length, with regular fittings,

per

inch.

Catalog

1955

stitches

per minute.

medium

rises

feed

Top

5-1/2

DESCRIPTION

(continued)

Machine 281-20,

Close-coupled

Puller

Feed

Light weight to medium weight fabrics. Needle bar stroke, 1-13/64 inches. Presser

Maximum

stitch

Needle, Catalog 1955.

bar lift,

5/16

inch.

stitch length, with regular fittings, 5-1/2

per

inch.

Close-coupled puller feed 1-9/16 inches behind

needle.

through

eccentric.

Feed roll intermittently actuated by coupling

set

of gears, countershaft, clutches and

Eccentric independently

adjustable

bring motion of feed roll in unison with motion of

feed dog.

Speed, 5000

Machine281-22,

stitches

Needle

per minute.

Feed

Machine 281-23,

Light to medium weight fabrics. Needle bar stroke, 1-13/64 inches. Presser

Maximum

stitches

Needle,Catalog 1955. Side wheel feed roll independently

bring

feed dog.

to

Speed, 5000

Machine

Side-wheel

bar lift,

5/16

Puller

inch.

Feed

stitch length, with regular fittings, 5-1/2

per inch.

adjustable

motion

281-24

of feed roll in unison with

stitches

Needle

per minute.

Feed

motion

to

of

Light weight to medium-heavy weight Needle bar stroke, Presser

Maximum

stitches

bar lift,

stitch

per inch.

1-13/64

5/16

length, with regular

inches.

inch.

Needle, Catalog 1955.

Compound feed mechanism,

feed and drop feed, insures

or more

Improved

regulator

justmentofneedle

Speed, 5000

pliesofmaterial.

stitch

regulating mechanism. Needle feed

con be locked to permit

feed

stitches

per minute.

consisting

positive

and drop

feed.

fabrics.

fittings,

of

needle

feeding of two

simultaneous

ad

10

Light to medium weight fabrics.

Needle

Presser

Maximum

stitches

bar

stroke,

bar lift,

1-9/64

9/32

inches.

inch.

stitch length, with regular fittings 10

per inch.

Needle, Catalog 1361 (88x9)

Compound feed mechanism, consisting of needle

feed and drop feed, insures positive feeding of

two or more

pliesofmaterial.

Improved stitch regulating mechanism. Needle feed

regulator con be locked to permit simultaneous

adjustment of needle feed and drop feed.

Speed, 5500

stitches

per minute.

GASKET

PLUNGER

Fig.

2. Machine

Base

and Oil Reservoir

LOW

MARK

HIGH

MARK

OIL

RESERVOIR

See that plunger is in place, as

before placing

Machine

table

cut-out and

machine

base

on base. base is level, so that oil level will be accurately in

and

oil

reservoir

rests

on four corners without bolting. Machine head is not

shown

fits

in Fig. 2, Use shims on corners,

into

dicated

standard

by marks on

Rasp edges of cut-out, shown in Fig. 2, if necessary, gasket in base.

so

that

machine

base.

THEKNEE

LIFTER

does

not touch

table

when

placed

on the head

STOP

except

SCREW

Knee lifter is shipped assembled to the base ex

cept for the knee plate and lifter lever.

Loosen the two clamp screws shown in Fig. 3 and

slide

the rock shaft forward to position shown.

lifter

lever.

Attach,

Set the stop screw, Fig. 3, so that there is only a

little play in the lever before it starts to lift the

bar. Then

tighten

lock

nutonstop

screw.

presser

CLAMP

SCREWS

Set the rear stop dog to allow the presser bar to be

REAR

raised

to

its

limit and

tighten

the

two clamp

screws.

STOP

when

base.

fastened

Machine

when machine is

DOG

hinge pins must not support

LOCK

NUT

required to insure that

but should

tilted

KNEE

back,

ROCK

LIFTER

rest

SHAFT

LEVER

PLATE

on cork

I

CAUTION: Do not thoroughly lubricated in

instructions.

operate

accordance

machine until it

with the following

has

been

LUBRICATION

Before

filled to

Use

"TYPE produce a minimum

starting

HIGH

SINGER

C"

machine,

MARK

shown in Fig. 2

OIL

OIL when an oil is

of

"TYPE

stain

the

A"

on

oil

reservoir

or

desired

fabrics

"TYPE

even

must be

C".

Use

which will

after

long period of storage.

Do not use

they

may

can

result

Should

window

as

STOP MACHINE AND DO NOT RUN AGAIN

cause

has

Check oil level often to keep it

low

mark.

The Oil Flow Regulator

additives

in sewing machine oil,

causeareduction

in damage to machine.

the

shown

been

oil flow,

eliminated.

passing

in Fig. 4, stop or

in normal oil flow

through

the

become

from

going below

as

that

oil flow

erratic,

until

the

Lubrication of the sewing hook is automatically

controlled by the oil flow regulator shown in Fig. 5.

SHOULD

SHOW

STEADY

FLOW

OF

OIL

a

Fig.

4. Oil Flow Window

THREAD

POSIT,OH

FEED

GUARD

BAR

HOOK

BODY

SCREWS

Regulator is set at the factory for lubrication under

average

hook,

tablish a

hold 0

chine for about ten

Iine of oil on paper, beneath the

fine spray on

paper, turn oil

or decrease the

justmentstoinsure

sewing

conditions.

To determine whether oil is properly

run

machine for approximately one minute to es

uniform

piece

rate of

flow.

Then open the bed slide,

of paper under the hook and run the ma

seconds.

There should be a

hook

each

If

there

Machine

is no

must

sideofthis

trace

of oil or an

flow

regulator to right or left to increase

flow

of oil, as shown in Fig. 5.

run

at

uniform oil flow.

least'

line.

one

excess

minute

flowing

to the

distinct

bearing, with a

of oil on

between

the

ad

If the proper rote of flow cannot be obtained by

turning the regulator, inspect the oil flow mechanism

as

follows:

Remove

chine.

Remove

Fig.

Loosen two

needle,

bobbin and bobbin

bracket screw and position finger

5.

hook

body screws and turn machine

case

from ma

shown

pulley until feed bar reaches its highest point.

in

BRACKET

SEWING

FILTER

Fig. 6. Sewing Hook

SCREW

Fig.

HOOK

SCREW

5. Oil Flow

a

WICK

Filter

OIL

FLOW

Regulator

OIL

FLOW

REGULATOR

U-

Screw and Wick

REGULATOR

Turn the sewing hook until thread guard is at the

from

bottom as shown in Fig. 5 and slide hook

shaft.

Loosen filter screw shown in Fig. 6 and check to see if wick has becomedetached or clogged.

Inspect all

passages

for dirt and lint accumulation.

Reploce wick if necessary.

Assemble sewing

chine.

hook

and position finger to

ma

Re-check oil flowaspreviously instructed.

Sk^ING

Using a

other sharp instrument), remove lint and other

from around

underside of throat plate and from all other operating

points.

short

sewing

bristle

hook, from

brush (not point of

between

feed rows and

CLEAN

scissors

waste

or

Tilt

machine back on hinges.

Wrap

clean

magnet, shown in Fig. 7, on oil pump body and pull

from

accumulated foreign particles

Wipe exterior of machine dry with a soft

magnet.

rog around

cloth.

MOVE

HIGHEST

TO

POINT

Machine

281-5

AS

AND

LOOSEN

INSERT

FAR

LONG

NEEDLE

AS

TIGHTEN

GROOVE

SCREW

POSSIBLE

SCREW

Fig. 9. Machine 281-5

LONG

OOVE^^

GROOVE

MOVE

"^HIGHEST

LOOSEN

INSERT AS AND

FAR

TIGHTEN

TO

NEEDLE

AS

POINT

SCREW

UP

POSSIBLE

SCREW

Fig. 10. Machines 281-6 and 281-20

UP

Use SINGER* Needle, Catalog 1515 (16x95), in

sizes

ranging from 11 to 22.

Machines

281-6, 281-20, 281-22

Use

SINGER* Needle,

and

Catalog

281-23

1955, in

sizes

rang

ing from 8 to 22.

Machine

Use

281-24

SINGER*

Needle,

Catalog

1361, in

sizes

rang

ing from 8 to 22.

Size of

needle

to be

used

should be determined by

weight of thread and type of material being sewn.

Orders for needles should specify quantity required,

size

number and catalog number.

For

example:

100 No. 16, Catalog 1361 Needles

LOOSEN

INSERT

FAR

AND

LONG

INSERT

FAR

AND

MOVE

HIGHEST

AS

TIGHTEN

MOVE HIGHEST

LOOSEN

GROOVE

NEEDLE

AS

TIGHTEN

TO

Fig.

11. Machines 281-22 and 281-24

Fig. 12. Machine 281-23

TO

SCREW

NEEDLE

POSSIBLE

GROOVE

TO

SCREW

POSSIBLE

POINT

SCREW

POINT

UP

SCREW

UP

SETTING

the

needle

Turn machine pulley over toward operator until

needle

9to12.

needle

needle to the left and

bar

reaches

highest

point

as

shown in

Loosen needle clamping screw. Insert

bar

as

far

as

it will go, with long groove of

eye

of needle directly in line

needle

Figs.

into

with arm of machine. Then tighten the clamping screw.

UPPER

THREADING

Turn machine pulley over toward operator until

needle

Figs.

of thread through needle

bar is at

Pass

highest

point.

thread through threading points indicated in

13 to 18, page 9. Draw approximately two

eye

with which to

start

inches

sewing.