UnionSpecial 39500FS Instruction sheet

From the library of: Superior Sewing Machine & Supply LLC

FINE

ST

QUALITY

ST

YLES

39

500FS

39

500FT

395

00FU

39S

00G

D

395

00GL

395

00GT

395

00J

P

395

00MM

CATALOG

No.

103FS

SECOND

EDITION

LEWIS•

COLUMBIA

CLASS

39500

HI-STYLED

®

INDUSTRIAL

SEWING

MACHINES

HIGH

SPEED

OVERSEAMERS

WITH

INTERMITTENT

DIFFERENTIAL

FEED

CHICAGO

From the library of: Superior Sewing Machine & Supply LLC

Here

are

Oil

Specifications

for

Union

Special

Sewing

Machines

Specification

174

spec

ifies a high q

ualit

y pet-

roleum

oil,

viscosity

100

sec

ond

s at

100°

F. Recom-

mended

for

all

oiling

applications

on high speed

machine

s.

Specification 175 specifies a high

quality

pet

-

ro

leum

oil, viscosity

100

seconds at

100°F

., water

whit

e or wi

th

a

maximum

A.S.T.M. co

lor

number

of

1.

For

use

where freedom from

oil

staining is para-

mount.

Specification 87 specifies a high

quality

pet

·

roleum

oil,

viscosi

ty

300

seconds at

100°F.

Specification

100

specifies a general purpose

high

quality

grease

for

use

in ball bearings and trans-

mitter

s.

It

is

similar

to

commerc

i

al

N.L.G

.I.

, grease

No

.

3. Where

No.

3 grease

is

not

obtainable,

No.

2

may

be

used.

UNION

SPECIAL

SPECIFICATION

NO. 174 175

87

Viscosity S.S.U.

at

100°F

90-125

90

-

125

300-350

Flash

(Min.)

350

Pour

(Max.)

20 20

20

Color

A.S.T.M.

(Max.)

3 1 3

Neutralization

No. (Max.) 0.

10

0.

10

0.10

Viscosity

Index

(D

& D

Min

.) 85

85 85

Compounding

None

Copper

Corro

si

on

(Max

.)

lA

*

An

line

No

. 175-225 175-225 175-

225

*Used

wi

th

Buna N

Rubber

"

O"

Retainers

..

NOTE

1: The

use

of

non-

corrosive additives

in

oil

s

meeting above classification

is

desirable

but

not

essential. These

may

include

:

1.

Oxidation

inhib

i

tors

2.

Rust

inhibitors

3.

Lubr

i

city

addit

i

ves

4.

Anti

-

oxidant

s

5.

Film

strength

additives

These additives

must

be

completely

so

lubl

e

in

the

oil

and

not

removable

by

wick

feeding

nor

shall

they

separate.

NOTE

2:

Oil

s c

onta

ining

th

e

following

type

addit

i

ve

s

shall

not

be

used

at

a

ny

time

:

1.

Extreme

pressure additives-corrosi

ve

2. Tackiness

or

adhesive additives

3. Lead soap

additives

4. Detergents

®

f!

NUT

OUA

U

TY

CORPORATION

From the library of: Superior Sewing Machine & Supply LLC

October,

197

3

Catalog

No.

103

FS

INSTRUCTIONS

FOR

ADJUSTING

AND

OPERATING

LIST

OF

PARTS

Class

39500

FS

39500

FT

39500

FU

39500

GD

Styles

39500

GL

39500

GT

39500

JP

39500

MM

Second

Edition

Copyright

1967

By

Union

Special

Corporation

Rights

Reserved

in

All

Countries

CORPORATION

INDUSTRIAL

SEWING

MACHINES

CHICAGO

Printed

in

U.S.

A.

3

From the library of: Superior Sewing Machine & Supply LLC

IDENTIFICATION

OF

MACHINES

Each

Union

Special

machine

is

identified

by

a

Style

number

on

a

name

plate

on

the

machine.

Style

numbers

are

classified

as

standard

and

special.

Standard

Style

numbers

have

one

or

more

letters

suffixed.

but

never

contain

the

letter

"Z".

Ex-

ample:

"Style

39500

FS".

Special

Style

numbers

contain

the

letter

"Z".

When

only

minor

changes

are

made

in

a

standard

machine.

a

"Z

II

is

suffixed

to

the

standard

Style

number.

Example:

"Style

39500

FSZ".

Styles

of

machines

similar

in

construction

are

grouped

under

a

Class

number

which

differs

from

the

Style

number

in

that

it

contains

no

letters.

Example:

"Class

39500".

APPLICATION

OF

CA

TA

LOG

This

catalog

applies

specifically

to

the

standard

Styles

of

machines

as

listed

herein.

It

can

also

be

applied

with

discretion

to

some

Special

Styles

of

machines

in

Class

39500.

References

to

directions,

such

as

right.

left,

front,

back.

etc

••

are

given

from

the

operator's

position

while

seated

at

the

machine.

Operating

direction

of

handwheel

is

away

from

operator.

STYLES

OF

MACHINES

Hi-Style

High

Speed,

One

or

Two

Curved

Blade

Needles.

Two

Looper.

Three

or

Four

Thread

Overseaming

Machine.

Intermittent

Differential

Feed.

Trimming

Mechanism

with

Spring

Pressed

Lower

Knife.

Automatic

Lubricating

System.

39500

FS

Single

needle

three

thread.

medium

to

heavy

duty

machine.

for

seaming

and

intermittently

gathering

or

shirring

on

woven

and

knit

materials

such

as

dresses.

aprons.

lingerie.

smocks.

nightgowns

and

similar

garments.

Knee

press

controlled

tandem

intermittent

differential

feed.

Slotted

presser

foot

to

separate

top

and

bottom

plies.

Gathering

ratio

up

to

3

to

1

depending

on

stitch

length.

Seam

specification

504-SSa-1.

Standard

width

of

seam

1/8

inch

(3.17

mm).

Stitch

range

8-20

per

inch.

Cam

adjusted

main

and

differential

feeds.

Maximum

recommended

speed

6000

R.P.M.

39500

FT

Single

needle

three

thread,

medium

to

heavy

duty

machine.

for

seaming

and

intermittently

gathering

or

shirring

on

woven

and

knit

materials

such

as

dresses.

aprons.

lingerie.

smocks.

nightgowns

and

similar

garments.

Knee

press

controlled

_

tandem

intermittent

--.?

ifferential

feed.

Independent

swing-out

pressure

plate

att

a c

lmien

t

for

shirring

.!

Gathering

ratio

up

to

3

to

1

depending

on

stitch

length

';-

Seam

specificat

T

<5il"

504-SSa-1.

Standard

width

of

seam

3/16

inch

(4.

76

mm).

Stitch

range

8-20

per

inch.

Cam

adjusted

main

and

differential

feeds.

Maximum

recommended

speed

6000

R.P.M.

39500

FU

Single

needle

three

thread.

medium

to

heavy

duty

machine.

for

seaming

and

intermittently

gathering

or

shirring

on

woven

and

knit

materials

such

as

dresses,

aprons.

lingerie.

smocks.

nightgowns

and

similar

garments.

Knee

press

controlled

tandem

intermittent

differential

feed.

Presser

foot

bottom

grooved

for

1/ 8

inch

cord.

Independent

swing-out

pressure

plate

attachment

for

shirring.

Gathering

ratio

up

to

5

to

1

depending

on

stitch

length.

Seam

speci-

fi

cation

504-SSa-1.

Standard

width

of

se

am

3/16

inch

(4.

76

mm).

Stitch

range

8-20

per

inch.

Cam

adjusted

main

and

differential

feeds.

Maximum

recommend-

ed

speed

5500

R.P.M.

39500

GD

Two

needle

four

thread.

medium

to

heavy

duty

machine.

for

seaming

and

intermittently

gathering

or

shirring

on

woven

and

knit

materials

such

as

dres

-

ses.

aprons.

lingerie.

smocks.

nightgowns

and

similar

garments.

Knee

press

controlled

tandem

intermittent

differential

feed.

Independent

swing-out

pres

-

su

re

plate

attachment

for

s

hirring.

Gath

er ing r

atio

up

to

3

to

1 de

pending

on

stitch

length.

Seam

specification

512-SSa-1.

Standard

width

of

seam

from

left

needle

17

/ 64

inch

(6.

75

mm).

Stitch

range

8-20

per

inch.

Cam

adjusted

main

and

differential

feeds.

Maximum

recommended

speed

6000

R.P.M.

4

From the library of: Superior Sewing Machine & Supply LLC

STYLES

OF

MACHINES

(Continued)

39500

GL

Two

needle

four

thread,

medium

to

heavy

duty

machine,

for

seaming

and

intermittently

gathering

or

shirring

on

woven

and

knit

materials

such

as

dres

-

ses.

aprons,

lingerie,

smocks,

nightgowns

and

similar

garments.

Knee

press

controlled

tandem

intermittent

differential

feed.

Independent

swing-out

pres

-

sure

plate

attachment

for

shirring.

Gathering

ratio

up

to

5

to

1

depending

on

stitch

length.

Seam

specification

512-SSa-1.

Standard

width

of

seam

from

left

needle

17/ 64

inch

(6.

75

mm).

Stitch

range

8-2

0

per

inch.

Cam

adjusted

main

and

differential

feeds.

Maximum

recommended

speed

5500

R.P.M.

39500

GT

Single

needle

three

thread.

medium

to

heavy

duty

machine,

for

seaming

and

intermittently

gathering

or

shirring

on

all

types

of

cotton,

dacron,

rayon

and

silk

fabrics

where

a 3/ 32

inch

(2. 38

mm)

turned

down

hem

is

desired.

Knee

press

controlled

tandem

intermittent

differential

feed.

Presser

foot

has

a

short

curler

stitch

tongue.

Independent

swing-out

pressure

plate

attachment

for

shirring.

Gathering

ratio

up

to

3

to

1

depending

on

stitch

length.

Seam

speci-

fication

504-EFe-1

inverted.

Standard

width

of

seam

3/32

inch

(2.

38

mm).

Stitch

range

10-20

per

inch.

Cam

adjusted

main

and

differential

feeds.

Maxi-

mum

recommended

speed

6000

R.P.M.

39500

JP

Single

needle

three

thread.

light

to

medium

duty

machine,

with

operator

adjusted

intermittent

differential

feed

for

seaming

and

trimming

all

types

and

weights

of

flat,

warp

and

ribbed

knit

cotton,

wool,

rayon

and

silk

fabrics

where

long

straight

seams

are

necessary.

Thumbscrew

feed

which

allows

either

re-

versed

or

forward

differential

feeding.

Seam

specification

504-SSa-1.

Standard

width

of

seams

3/32

and

1/8

inch

(2.38

and

3.17

mm).

Stitch

range

8-30

per

inch.

Cam

adjusted

main

and

differential

feeds.

Maximum

recommended

speed

6000

R.P.M.

39500

MM

Single

needle

three

thread,

medium

to

heavy

duty

machine,

for

seaming

and

intermittent

gathering

or

shirring

on

woven

and

knit

materials

such

as

dresses,

aprons,

lingerie,

smocks.

nightgowns

and

similar

garments.

Knee

press

controlled

tandem

(in

termitten

t

differential

feed.

Independent

swing-out

pressure

plate

g

tac

h

men

t

fo

.~..

shi

!.

rin

)~

Gathering

ratio

up

t?

5

to

1

depending

on

stitch

length.

S

eam

specification

SU

4-SSa-1.

Standard

width

of

seam

3/16

inch

(4.

76

mm).

Stitch

range

8-20

per

inch.

Cam

adjusted

main

and

differential

feeds.

Maximum

recommended

speed

5500

R.P.M.

OILING

CAUTION!

Oil

was

drained

from

machine

when

shipped.

so

reservoir

must

be

fiiled

before

beginning

to

operate.

Oil

capacity

of

Class

39500

is

sw

ounces.

A

straight

mineral

oil

of

a

Saybolt

viscosity

of

90

to

125

seconds

at

100

Fahrenheit

should

be

used.

Machine

is

filled

with

oil

at

spring

cap

in

top

cover.

Oillevel

is

checked

at

sight

gauge

on

front

of

machine.

Red

bulb

on

oil

level

indicator

should

show

between

gauge

lines

when

machine

is

stationary.

Machine

is

automatically

lubricated.

No

oiling

is

necessary,

other

than

keeping

main

reservoir

filled.

Check

oil

daily

before

the

morning

start;

add

oil

as

required.

The

oil

drain

plug

screw

is

located

at

back

of

machine

near

bottom

edge

of

base.

It

is

a

magnetic

screw

designed

to

accumulate

possible

foreign

materials

which

may

have

entered

the

crank

case.

It

should

be

removed

and

cleaned

periodically.

5

From the library of: Superior Sewing Machine & Supply LLC

NEEDLES

Each

Union

Special

needle

has

both

type

and

size

number.

The

type

number

de-

notes

the

kind

of

shank,

point,

length,

groove,

finish

and

other

details.

The

siz

e

number,

stamped

on

the

needle

shank,

denotes

largest

diameter

of

blade,

measured

in

thousandths

of

an

inch,

midway

between

shank

and

eye.

Collectively,

type

and

size

number

represent

the

complete

symbol

which

is

given

on

the

label

of

all

nee-

dles

packaged

and

sold

by

Union

Special.

Class

39500

machines

use

a

curved

blade

needle.

The

standard

recommended

needle

for

Styles

39500

FS,

FT.,

FU,

GD,

GL,

JP

and

MM

is

Type

154

GAS

..

while

the

standard

needle

for

Style

39500

GT

is

Type

154

GBS.

Below

are

the

type

numbers,

description

and

sizes

available

of

the

recommended

needles.

Type

No.

154

GAS

154

GBS

Description

and

Sizes

Round

shank,

round

point.,

curved

blade,

standard

length,

single

groove,

struck

groove,

spotted,

chromium

plated

and

is

available

in

sizes

022., 025, 027, 029, 032, 036, 040, 044, 049, 054,

060.

Round

shank,

round

point,

curved

blade,

standard

length,

double

groove,

struck

groove,

spotted,

chromium

plated

and

is

available

in

sizes

027, 029,

032.

To

have

needle

orders

promptly

and

accurately

filled,

an

empty

package,

a

sample

needle,

or

the

type

and

size

number

should

be

forwarded.

Use

description

on

label.

A

complete

order

would

read:

11

1000

Needles,

Type

154

GAS,

Size

027

11

•

Selection

of

the

proper

needle

size

is

determined

by

size

of

thread

used.

Thread

should

pass

freely

through

needle

eye

in

order

to

produce

a

good

stitch

formation.

Success

in

the

operation

of

Union

Special

machinee

can

be

secured

only

by

use

of

needles

packaged

under

our

brand

name,

~

.,

which

is

backed

by

a

re-

putation

for

producing

highest

quality

needles

in

materials

and

workmanship

for

more

than

three-quarters

of

a

century.

CHANGING

NEEDLES

Release

pressure

on

presser

foot

by

turning

presser

foot

release

bushing

(AG,

Fig.

1

and

lA)

and

swing

presser

arm

(U)

out

of

position.

Turn

handwheel

in

opera-

ting

direction

until

needle

is

at

its

lowest

point

of

travel.

Using

hexagonal

socket

wrench

No.

21388

AU.,

furnished

with

machine,

loosen

needle

clamp

nut

about

1/4

turn.

Again

turn

handwheel

until

needle

"is

at

high

position;

withdraw

needle.

To

replace

needle,

leave

needle

holder

at

high

position

and,

with

the

flat

to

the

left,

insert

needle

in

holder

until

it

rests

against

stop

pin.

Keeping

needle

in

this

position,

turn

handwheel

until

holder

is

again

at

its

low

point

of

travel,

then

tighten

nut.

Return

presser

arm

(U)

to

position;

re-lock

presser

foot

release

bushing

(AG).

THREAD

STAND

(504

STITCH)

After

thread

comes

from

cones

on

cone

support

(A.,

Fig.

1

),

it

is

brought

up

through

back

hole

of

thread

eyelet

(B).,

then

down

through

the

front

hole

of

thread

eyelet.

is

threaded

through

the

upper

holes

of

tension

thread

guide

(C)

from

front

to

back

and

then

throu

gh

the

lower

holes

from

back

to

front.

It

should

be

noted

that

the

lower

looper

thread

is

threaded

through

the

tension

thread

guide

(C

),

first

through

the

upper

hole

back

to

front.,

second

throu

gh

the

middle

hole

front

to

back

and

third

through

the

lower

hole

back

to

front.

All

threads

then

continue

between

the

tension

discs

(J).,

through

tension

post

slot

(K)

in

tension

post

(G)

and

on

through

front

thread

guide

(M).

6

From the library of: Superior Sewing Machine & Supply LLC

li]

Tension

Nut

II

Tension Spring Fe

r~

II

Tension

Spring~

---~~~

[!]

Tension

Post

IIJ

spring

Shield

..

..-:::

:,

~

O Tension

Discs

:~.::

··

l3

Tension

Post

Slot :

IITension

Disc

Felt

·..

[i

Te

nsion

Thr

e

ad

Guide

FIJ

Front

Thr

e

ad

Guide

IIJupper

Looper

Thread

Eyelet

Iii

Auxiliary

Looper

Thread

Eyelet

(9Lower

Looper

Thread

Eyelet

DFrame

Looper

Thread

Guide

DJ

Presser

Arm

Fig.

1

l;)

Thread

Eyelet

7

Top

Cover

..

..,.,.

Needle

Thread

Eyelet

Upper

Looper

Thread

Tube

Assembly

m

Lower

Looper

From the library of: Superior Sewing Machine & Supply LLC

m Tension

Nut

[!]

Tension

Po

st

ll)

spring Shield

..

O Tension Di

scs

·..

__

_

(I

Tension

Post

Slot ·.

nTe

nsion

Dis

c Felt

·.

[i

Tension

Thr

e

ad

Guid

t,

f,I)

Front

Thr

ead Guide

(II

Upper Looper

Thread

Eyelet

Iii

Auxiliary

Looper

Thread

Eyelet

i9

Lower

Looper

Thr

e

ad

Eyelet

(il

Fabric

Guard

Br

a

cket

D

Frame

Looper

Thread

Guide

m

Presser

Arm

Fig.

lA

(;)

Thr

e

ad

Ey

elet

---...

8

i

I

\

I

Top

Cover

..

lllli..

Needl

e

Thread

Eyelet

Upper

Looper

Thread

Tube Aa

sembly

~

Upper

Looper

m

Lower

Looper

From the library of: Superior Sewing Machine & Supply LLC

THREAD

STAND

(512

STITCH)

After

thread

comes

from

cones

on

cone

support

(A,

Fig.

lA

),

the

needle

threads

are

threaded

through

the

back

bar

of

the

thread

eyelet

(B),

under

the

middle

bar

and

through

the

center

holes

of

the

front

bar.

The

looper

threads

come

from

the

cones,

through

holes

of

the

middle

bar

from

back

to

front

and

then

through

the

two

outside

holes

of

the

front

bar.

is

threaded

through

the

upper

holes

of

tension

thread

guide

(C)

front

to

back

and

then

through

the

lower

holes

from

back

to

front.

The

threads

continue

between

the

tension

discs

(J),

through

tension

post

slot

(K)

in

tension

post

(G)

and

on

through

front

thread

guide

(M).

NOTE:

Refer

to

Fig.

1

for

threading

Styles

39500

FS,

FT,

FU,

GT,

JP

and

MM,

or

refer

to

Fig.

lA

for

threading

Styles

39500

GD

and

GL.

THREADING

Only

parts

involved

in

threading

are

shown

in

threading

diagrams

(Fig.

1

and

lA).

Parts

are

placed

in

their

relative

positions

for

clarity.

It

will

simplify

the

threading

of

these

machines

to

follow

the

recommended

se

-

quence

of

threading

lower

looper

first,

upper

looper

second,

and

needle

or

needles

third.

The

threading

in

Fig.

1

and

Fig.

lA

are

the

same,

the

only

difference

will

be

the

threading

of

two

needle

threads

in

Fig.

lA

as

compared

to

one

needle

thread

in

Fig.

1.

The

additional

needle

in

Fig.

lA

moves

the

lower

looper

thread

tension

post

to

the

right.

Before

beginning

to

thread,

swing

cloth

plate

open,

turn

handwheel

in

operating

direction

until

needle

(X)

is

in

high

position,

release

pressure

on

presser

foot

by

turning

presser

foot

release

bushing

(AG),

and

swing

presser

arm

(U)

out

of

posi-

tion.

Be

sure

the

threads,

as

they

come

from

the

tension

thread

guide

(C),

are

be-

tween

the

tension

discs

(J)

and

in

tension

post

slot

(K)

in

tension

post

(G).

The

tens-

ion

posts

should

be

positioned

so

the

tension

post

slot

will

be

at

the

approximate

angle

for

the

different

threads

as

indicated

in

Fig.

1

and

lA.

TO

THREAD

LOWER

LOOPER

Double

end

of

thread

and

lead

it

through

both

eyes

of

lower

looper

thread

eye

-

let

(R,

Fig.

1

or

lA)

from

right

to

left.

NOTE:

Thread

must

pass

in

front

of

looper

thread

pull-off

·(AF).

Lead

thread

behind

fabric

guard

(S)

and

through

hole

of

frame

looper

thread

guide

(T).

Turn

handwheel

in

operating

direction

until

heel

of

lower

looper

(V)

is

all

the

way

to

the

left;

then

thread

through

both

eyes

from

left

to

right.

Left

eye

of

lower

looper

can

be

threaded

easily

if

tweezers

are

in

left

hand.

TO

THREAD

UPPER

LOOPER

Turn

handwheel

until

point

of

upper

looper

(W)

is

all

the

way

left.

Lead

thread

through

auxiliary

looper

thread

eyelet

(P)from

back

to

front,

then

through

both

eyes

of

upper

looper

thread

eyelet

(N)

from

left

to

right.

NOTE:

Thread

must

pass

in

front

of

looper

thread

pull-off

(AF).

After

pulling

up

upper

looper

thread

tube

assembly

(AA).

lead

thread

under

neck

of

top

cover

casting

and

down

through

thread

tube

as

-

sembly

(AA).

Pull

thread

out

bottom

of

tube;

push

tube

down,

then

insert

thread

through

upper

looper

eye

from

front

to

back.

CAUTION!

Be

sure

upper

looperthread

is

under

lowerlooperthreadwhenpass-

ing

from

tube

assembly

to

upper

looper

eye.

9

From the library of: Superior Sewing Machine & Supply LLC

TO

THREAD

THE

NEEDLE

Turn

handwheel

in

operating

direction

until

needle

or

needles

(X.

Fig.

1

or

lA)

is

at

its

highest

position.

Insert

needle

thread

or

threads

from

right

to

left.

through

both

eyes

of

needle

thread

eyelet

(AD).

under

neck

of

top

cover

casting;

and

then

down

through

hole

or

holes

in

top

cover

needle

thread

eyelet

(AC).

Thread

needle

from

front.

THREAD

TENSION

The

amount

of

tension

on

needle

and

looper

threads

is

regulated

by

tension

nuts

(D.

Fig.

1

or

lA).

Tension

on

threads

should

be

only

enough

to

secure

proper

stitch

formation.

PRESSER

FOOT

PRESSURE

Sufficient

presser

foot

pressure

to

feed

work

uniformly

should

be

maintained.

Should

it

be

necessary

to

increase

or

decrease

amount

of

pressure

on

presser

foot.

loosen

lock

nut

(A.

Fig.

2)

and

turn

adjusting

screw

(B).

Adjusting

screw

has

a

right

hand

thread

so

tightening

increases

pressure.

loosening

decreases

pressure.

When

pressure

adjusting

screw

(B)

has

been

properly

set.

tighten

lock

nut

(A).

With

presser

foot

resting

on

throat

plate.

position

locking

nut

(C)

so

that

its

under

surface

is

approximately

1/ 32

inch

to

1/16

inch

(.

79

to

1.

59

mm)

from

the

top

surface

of

ad-

justing

screw

(B).

Set

cap

(D)

against

locking

nut

(C).

FEED

ECCENTRICS

Fig.

2

Feed

eccentrics

used

in

Style

39500

FS

machines

have

been

selected

to

produce

approximately

14

stitches

per

inch.

It

will

be

noted

that

the

part

number

of

main

feed

eccentric

is

No.

39540

B-14

while

'

that

of

the

differential

feed

eccentric

is

No.

39540

B-4.

Minor

numbers

of

the

part

symbol

indicate

approximately

the

number

of

stitches

obtainable

when

using

that

eccentric.

Unless

otherwise

specified.

machine

will

be

shipped

with

above

combination

of

eccentrics.

Refer

to

exploded

views

for

eccentrics

used

on

the

other

styles

of

machines

covered

in

this

catalog.

Generally

speaking.

the

main

(right

hand)

feed

eccentric

determines

the

number

of

stitches

produced;

the

differential

(left

hand)

feed

eccentric

is

selected

so

as

to

give

the

proper

differential

or

gathering

action.

Following

stitch

number

feed

eccentrics

are

available

under

No.

39540

B-4.

5.,

6.

1.

8.,

9.

10. 11. 12. 13.

14.,

15.,

16.,

18.,

20.,

22. 24.

26.,

28.,

30.,

32.,

34. 36.

40.

Only

two

eccentrics

are

supplied

with

each

ma-

chine.

Additional

eccentrics

may

be

ordered

separ-

ately.

To

order

an

eccentric.

use

No.

39540

B

with

Fig.

3

a

minor

number

suffixed

to

indicate

number

of

stitches

desired.

Example:

"39540

B-14".

ASSEMBLING

AND

ADJUSTING

SEWING

PARTS

Before

assembling

and

adjusting

sewing

parts.

remove

cloth

plate.,

fabric

guard.,

chip

guard.,

upper

knife

assembly.

lower

knife

holder

assembly.

then

follow

this

suggested

sequence.

10

UnionSpecial 39500FS Instruction sheet

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