UnionSpecial 57100 Series Instruction sheet

®
F INEST QUALITY
ST YLES
57 100 c
CATALOG
No.
T141 M
Price $1.00
INDUSTRIAL
SEWING
I
MACHINES
CLASS 57100
ADVANCED HIGH SPEED
FIFTY THOUSAND SERIES
FLAT BED MACHINES
UNION SPECIAL CORPORATION
CHICAGO
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C a t a 1 o g N o. T 1 4 1 M
( S U P P L E M E N T T 0 C A T A L 0 G N 0.
1 3 1 M )
I N S T R U C T I 0 N S
F 0 R
A D J U S T I N G A N D 0 P E R A T I N G
L I S T 0 F P A R T S
F 0 R
S t y 1 e
5 7 1 0 0 c
F i r s t E d i t i o n
~ 1 9 7 7
b y
S p e c i a 1 C o r p o r a t i o n
U n i o n
R i g h t s R e s e r v e d i n A 1 1 C o u n t r i e s
UNION SPECIAL CORPORATION
INDUSTRIAL SEWING MACHINES
CHICAGO
P r i n t e d i n U. S. A.
2
April, 1977
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IDENTIFICATION OF MACHINES
Each UNION SPECIAL machine is identified by a Style numb er on a name pl ate on
t he m
achi ne . Style numbers are classified as standard and s p ecial . Sta ndar d Styl
numb ers h ave one or more letters suffixed , but never co n ta in t he le t ter "Z ".
E xa m ple : " Style 57100 C ". Special Style number s contai n t he l ette r "Z ". \.Jh en on ly
minor cha nges ar e made in a standard ma chi ne , a "Z" is suffixed to the standard
Style number. Examp le : "Styl e 57100 CZ".
Styl es of ma chi n es similar in c onstru c ti on ar e grouped under a class numb er
wh ich d iff er s from the style number, in that it c ontains no letters. Example : ''Cla ss
5 71 00 ".
APPLICATION OF CATALOG
T his.catalo g is a supplem e nt to Catalo g No. 131M. Second Edition, and should be
use d in conjunction therewith. Only thos e parts wh i ch are used on Style 57100 C, but
not
used on Style 57700 N are illustrated and list ed at the back of this book. For
cl ari ty, certain 57700 N parts ar e shown in phantom to assist in locating th e 57100 C
pa r ts. Opposite the i l lustration pages, parts are identified by a reference number,
part number, description and amount required. Any part that is a component of another
part is indicated by indenting its description under the description of the assembly
or base part. Always use the part number in the second column, never use the refer-
ence number in the first column when ordering repair parts.
This catalog applies specifically to the Standard Style of machine as listed
herein. It can also be applied with discretion to some Special Styles of machines
in these classes. References to direction, such as right, left, front, back, etc.,
are given from the operator's position while seated at the machine. Operating
direction of handwheel is toward the operator.
STYLE OF MACHINE
Advanced High Speed, Two needle, One Looper, Plain Feed Flat Bed Machines, Medium
Throw,
Needle Bearing Needle Bar Drive, Light Weight Presser Bar and Needle Bar
Driving Mechanism, Single Reservoir Enclosed Positive Automatic Lubricating System,
Filtered Oil Return Pumps for Head and Base, Needle Bearings and Bronze Bearings
for Feed Bar and Feed Rocker Shafts, Greased and Sealed. Laterial Looper Travel,
Double Disc Take-up, Large Handwheel and Improved Belt Guard. Prepared for use with
Knee Press for Presser Foot Lifter, Equipped with Disc Thread Tensions, Maximum
Work Space to Right of ~eedle Bar 8 1/4 Inches (209.6 mm).
57100 C For cording operations on light wei g ht woven and knitted fabrics, without
cord. Needle spacing or g ~uge is .080 inch (2.03 mm) or approximately No. 5
gauge. Standard height of tucking 1/8 inch (3.18 mm). Seam specification
402-0S-1. Type 108 GHS needle. Maximum recommended speed 6500 R.P.M.
NEEDLES
Each UNION SPECIAL needle has both a type number and a size number. The type
number denotes the kind of shank, point, length, groove, finish and other details.
The size number, stamped on the needle shank, denotes the largest diameter of the
blade , measured in thousandths of an inch or millimeters, midway between the shank
and the eye. Collectively, the type number and size number represents the complete
symbol, which is given on the label of all needles packaged and sold by Union
Special.
3
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NEEDLES (Continued)
The standard needle for Style 57100 C is Type 108 GHS. It has a round shank,
round point, extra short, double groove, struck groove, ball eye, ball point, spot t-
e d, chromium plated. Available in sizes 080/032, 090/036, 100/040, 110/044, 125/049.
To have needle orders promptly and accurately filled, an empty package,a sampl e
needle, or the type and size number should be forwarded. Use description on lab e l. A
complete order would read: "1000 Needles, Type 108 GHS, Size 090/036".
Selection of the proper needle size should be determined by the size of thread
used. Thread should pass freely through the needle eye in order to produce a good
stitch formation.
Success in the operation of UNION SPECIAL machines can be secured only by use of
needles packaged under our brand name,~ , which is backed by a reputation
for producing highest quality needles in materials and workmanship for more than
three-quarters of a century.
4
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INSTRUCTIONS FOR MECHANICS
LUBRICATION
CAUTION! Oi l has b ee n drained from the main reservoir b efo r e shipment , so the re s -r-
voir must be f ill ed to the proper level at plug scr ew (A, F ig . I) as indicated on oil
gauge (B), before beginning to operate. The capacity of the reservoir i s 12 oun ces
(340.2 gr.). Run machine slowly for several minutes to distribute the oi l to th e
various parts. Full spe ed operation can then be expected without damage.
RECOMMENDED OIL
Use a
straight mineral oil of a Saybolt viscosity of 90 to 125 seconds at 100°
Fahrenheit in the main reservoir. This is equiv alent to UNION SPECIAL specification
No. 175. Fill main reservoir at plug screw in upper crank chamber cover (A, Fig. 1)
and check oil level at gauge (B). Oil is at maximum safe operating level when ne edl e
is to the black line, located to the right of "OPERATE" zone, marked "FULL". Oil
should be added when needle is to the black line, located to the left of "OPERATE"
zone, marked "LOW". The recommended oil is available in 16 fluid ounce (453.6 gr.)
cans No. 28604 R.
CAUTION! It is improtant that these machines not be over filled.
It is recommended that a new machine, or one that has been out of service for
an extended period be lubricated as follows: Remov e the head cover, clean out lint
and directly oil the needle bar link and the needl e bar. Replace head cover as no
further hand oiling will be required. Run machine slowly for several minutes to
distribute oil to the various parts.
For machines in operation check the oil for dirt
and lint deposits at reasonable intervals. If dirty,
change the oil. An oil change is recommended every
2000 operating hours, or once a year. Oil may be
drained from main reservoir by removing plug screw
(C, Fig. 1) located below the cloth plate at front of
the machine, or by removing the lower crank chamber
cover, located at the back of machine.
A daily check before the morning start should
be made, to see that the oil level is at a safe
operating level, as outlined in the first paragraph.
Oil which has gone through the machine is filtered
and pumped back into the main reservoir, making too
frequent oilings unnecessary. Excessive oil in the
main reservoir may be drained by removing plug screw
(C, Fig. 1) located below the cloth plate at the
front of the machine. After draining oil, wipe the
hole and plug screw dry, paint hole and screw with a
little gasket cement, and re-assembly screw.
NOTE: Looper avoid and feed lift eccentric receive
oil thru the mainshaft, so when as se mbling be sure
oil holes in the eccentric line up with oil holes in
mainshaft when spot screw is in time spot.
OIL GAUGE
B
I
Fi g. I
The oil gauge is set at the factory to show th e prop er oi l l e vel in the r ese r-
voir. Should an adjustment become nece ssary, how v r, th e f ollowin g s tep s shoul d be
followed:
5
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OIL GAUGE (Continued)
1. Place the machine upright on a level table or bench.
2. Remove the oil reservoir plug screw (C, Fig. 1) and tip machine forward to
drain oil from the reservoir.
3. Make sure all oil is drained from main reservoir.
4. Remove lower crank chamber cover, located at the back of the machine.
5. Fill main reservoir to a level even with the bottom contour of the knee
press shaft bushing (D, Fig. 1).
6. Loosen lock nut (E) on the calibrating screw (F), and turn the screw to
the left or right until the gauge needle rests on the black line, located
to the left of "OPERATE" zone, marked "LOW".
7. Tighten lock nut (E) and replace plug screw (C) and lower crank chamber
cover.
8. Add oil so that gauge needle rests on the black line, located to the right
of "OPERATE" zone, marked "FULL".
NEEDLE LEVER BEARING OILER
Remove the head cover and upper crank chamber cover (G, Fig. 1). Check position
of needle lever bearing oiler (A, Fig. 2) located inside the arm casting, below the
upper crank chamber cover, which lubricates the needle lever stud (B). Make sure it
is tilted downwardly and that its delivery end (C) contacts the inside wall of the
bed casting at the back, just above the notch of the needle lever shaft bushing. (Do
not allow the oiler to rest on the needle lever). Allow 1/64 inch (.40 mm) clearance
as in Figure 2.
Fig. 2
6
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CAUTION!
FILL ALL OIL RESERVOIRS
BEFORE STARTING.
MACHINE HAS BEEN DRAINED
BEFORE SHIPPING.
THREADING AND OILING DIAGRAM FOR STYLE 57100 C
FILL
MAIN
RESERVOIR
HERE
FOR CORRECT
OIL LEVEL
NEEDLE OF GAUGE
SHOULD BE IN
OPERATE POSITION
Fig. 3
Thread machine as indicated above. The looper threading has been en t arged for
clarity.
The oil has been drained from the machine before shipping and the reservoir
must be filled before starting to operate. Maintain oil level in "OPERATE" position
and add oil when needle is to the black line located to the left of the "OPERATE"
zone marked "LOW". The machine is automatically lubricated and no oiling other than
keeping the main reservoir filled is necessary. For further lubricating instructions
refer to paragraphs on "LUBRICATION" and "RECOMMENDED OIL".
7
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ALIGNING THE NEEDLE BAR
Insert a new set of needles (Type and Siz e as requi red) and align the needle
bar so that the needles correspond with th e ver t ic al fa ce of the needle guard. To
turn needle bar (A, Fig. 4), loosen needle bar clamp sc r ew (B) and turn bar as re-
quired. Tighten clamp screw.
SYNCHRONIZING LOOPER AND NEEDLE MOTIONS
Insert the looper in the looper rocker and turn handwheel in operating direc-
tion until the point of the looper (A, Fig. 5), moving to the left is even with the
left side of the right needle (B). Note the height of the eye of the needle with
respect to the looper point, then turn handwheel in the reverse direction until the
looper point again moves to the left, and is even with the left side of the right
needle. If the motions synchronize, the height of the eye of the needle with respect
to the looper point will be the same. A variation of .005 inch (.127 mrn) is allow-
able. If the distance from the eye of the needle to the point of
the looper is greatest when the pulley is turned in the operating
direction move the looper drive shaft synchronizing stud (C) to
the rear. Moving it in the opposite direction acts the reverse .
Moving of the looper drive lever shaft synchronizing stud is
accomplished as follows: Loosen the clamp screw (D) of the looper
drive lever. To move stud to rear (away from operator), a light
tap with a small hammer, driectly on the stud is all that is re-
quired. To move stud forward (toward operator), remove the cloth
plate, throat plate support, oil reservoir top cover and oil res-
ervoir back cover, then, a light tap on the looper drive lever
rocker shaft, toward the operator, is all that is required. Note:
Looper drive lever (E, Fig. 5) has an oil seal collar and an "O"
ring between it and the bed casting. All end play must be removed
from the looper drive lever rocker shaft by compressing the "O"
ring until drive lever (E) and the oil seal collar make metal to
metal contact with the bed casting. Tighten screw (D).
With the looper at the extreme right end of its travel, Fig. 4
check the location of the center line of the right looper connec-
Fig. 5
tion rod bearing, using gauge No. 21227 CX. Re-
move nut (F, Fig. 5) and place hole in g. •1ge
over threaded stud. The left end of the gauge
should locate against the right side of the
looper rocker cone (G). If adjustment is neces-
sary, loosen the clamp screw (D) and reposition
the looper drive lever (E) as required. Ti g hten
clamp screw. If gauge is not available, se ttin g
can be checked with a scale. The distance be-
tween the center line of the looper rocker con e
and
the center and the center line of the loop-
er lever s tud should be 4 1/16 inch (103.19 mrn)
(Fi g. 5).
8
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SETTING THE LOOPER
I ns er t t wo new ne edles in the needle seat, type and size as specified.The loop -
er g
au ge is 5/32 in ch (3.97 mm), set the looper (A, Fig. 6) so the distance betw ee n
th e ce nt er of th e two needles (B) to the point of the looper is 5/32 inch (3.97 mrn),
wh en th e loop er is at its farthest position to th e right.Looper gauge No. 21225-5/32
can be used advantageously in making this adjustment.
If adjustment is required, loosen nut (C, Fig. 6) (it
has a left hand thread) and nut (D) on connecting rod (E),
turn the connecting rod forward or backward to obtain the
5/32 inch (3 .97 mrn) dimension. Retighten both nuts, first
nut (D). Then nut (C). Make sure the left ball joint is in
vertical position and does not bind after adjustment.
The looper is set correctly in line-
of-feed, if, as it moves to the left, be-
hind the needle, its point (A, Fig. 7)
brushes, but does not pick at the rear of
the needle (B).
If adjustment is necessary, loosen
lock screw (F, Fig. 6) and turn stop screw
(G) as required. Turning stop screw clock-
wise sets the looper to the rear and turn-
Fig. 6 ing it counterclockwise acts the reverse. Fig. 7
Holding looper to the front while making
this adjustment may prove helpful. Tighten lock screw when setting is obtained and
recheck th e adjustment.
SETTING HEIGHT OF NEEDLE BAR
The height of the needle bar (A, Fig. 8)
is correct when the top . of the left needle's
eye is 1/64 inch (.40 mrn) below the underside
of the looper, wh en the point of looper,
moving to the left, is ev en with the l e ft side
of this needle. If adjustment is necessary,
loosen screw (B) and reposition needle bar (A)
up
or down as required and retighten screw.
Care must be taken not to disturb the align- Fig. 9
ment
of th e needle bar while making this ad-
justm e nt, as the ne edl es are to have equal clearanc e on both th e
right and left sides of the needle slots in throat plate.
SETTING THE LOOPER AND LOOP RETAINER
Th e loop er and loop r e tainer ar e set c orr ec tly wh en th e
followin g conditions prevail: (1) Turn th e handwh eel i n th e ope r-
ating direction until the looper (A, Fig. 9) moving to th e right
and the left corner of the recess is under th e pron g of th e loop
Fi g. 8 retainer (B). At this point the prong shoul d proj e ct 1/64 inch
(.40 rnrn) over the looper, from back to front (Fi g. 9). I f this
1/64 inch (.40 rnrn) cannot be obtained then th e distance which th e pron g pro je cts over
the corner may be slightly altered by loosenin g the looper set s cr ew (C) and a pplyin g
pressure on the heel of the looper in the requir ed direction whil e r e ti g ht e nin g th e
screw. The point of the looper will th n hav e to be reset with r e sp e ct to th e back
of th e ne e dles by adjusting the loop er rock e r.
9
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SETTING THE LOOPER AND LOOP RETAINER ( Co ntinu e d)
(2.) When the looper moves to the right and passe s under th e prong of the loop re-
tainer there should be a minimum amount of clearan ce bet w ee n the top of the looper
and the underside of the prong, or just enough to pe rm i t a piece of paper to be
drawn between them. The adjustment is made by means of a small screw (A, Fig. 10),
that passes throu gh the throat plate and bears against the top of the loop retainer.
SETTING THE FEED DOG
Set the feed dog (A, Fig. 11) in the throat plate (B) so
there is equal clearance on all sides. See that the tips of the
teeth extend the depth of a tooth or approximately 3/64 inch
Fig. 10
(1.19 mm) above the throat plate
and are parallel with the throat
plate at high point of travel.
Adjust the supporting screw (C),
under the feed dog, to mainta i n
this setting. Screw (D) is used
to hold feed dog in position.
If feed dog teeth are not parallel with the
throat plate, loosen nut (A, Fi g. 12) and turn screw (B) clockwise to lower the
front teeth, and counterclockwise to raise the front teeth. Retighten nut when feed
dog is set properly.
CAUTION: See that there is sufficient space between underside of feed dog and top
of looper.
Should it be necessary to move the feed dog to the left or right, loosen screws
(A, Fig. 13) which hold the feed rocker (B) onto the feed rocker shaft (C), and move
feed rocker to desired position and retighten screws. Make sure the feed rocker arm
(D) does not bind after making this adjustment.
When the handwheel is turned in the operating direction the feed dog should
have equal clearance on both ends of the throat plate slots with feed travel set to
desired stitch length.
Should it be necessary to move
the feed dog forward or backward,
loosen nut (E, Fig. 13) which clamps
the feed rocker arm to the feed
rocker and move the feed rocker for-
ward or backward as needed and re-
tighten nut.
Fig. 12
Fig. 13
10
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CHANGING STITCH LENGTH
Set the stitch to required length. This is accomplished by loosening the lock-
nut (F, Fig. 13) 1/2 turn (it has a left hand thread) on the end of the stitch reg-
ulating stud and turning the stitch adjusting screw (G) located under the left end
of the cloth plate, in the head of the main shaft (H), which is marked with "L" and
"S". Turning the screw clockwise shortens the stitch (moves stitch regulating stud
toward the "S") and turning it in a counterclockwise direction lengthens the stitch
(moves stitch regulating stud toward the "L"). Retighten the locknut securely. To
prevent destructive damage to the feed drive bearing, the Key screw (J) must engage
the "U" shaped key slot in the ferrule (K).
NOTE: Any change in stitch length will necessitate a corresponding change in the
rear needle guard setting.
The feed rocker assembly may require lubrication or repair after years of
operation. This can be accomplished as follows: Loosen nuts (E, F, Fig. 13) and re-
move nut (F). Remove feed rocker arm (D) from machine by rocking slightly. Loosen
screws (A) and remove stop collar on right end of shaft (C). The shaft can now be
withdrawn. Loosen Allen screw (L) and remove shaft (M). Now, repack bearings.
When packing bearings the parts must be clean and grease should be applied
directly from the tube to avoid contamination. Tube of grease can be supplied under
the part number 28604 P. Greased bearings are located at (N, P, Fig. 13). If grease
sealed bearings are replaced they should be pressed in flush with the casting. To
assemble, reverse the procedure described in the previous paragraph. Start tapered
end of shafts first, twisting slightly when entering the grease seals to prevent
damage. Check for proper adjustment of feed dog as described under "Setting the
Feed Dog". Also check to see that there is no binding at any point.
SETTING THE REAR NEEDLE GUARD
Set the rear needle guard (C, Fig. 12) horizontally so that it does not quite
contact the rear of the right needle (D) when at its most forward point of travel.
A clearance of .005 inch (.127 mm) is permissible. It should be set as low as
possible, yet have its vertical face approach within about 3/64 inch (1.19 mm) of
the needle, until the point of the looper (E), moving to the left, is even with the
needle. To move needle guard forward or backward, merely loosen screw (F), move
needle guard as required, and retighten screw. To raise or lower needle guard,
loosen screw (F), and turn screw (G) clockwise to lower needle guard and counter-
clockwise to raise it. Retighten screw (F) after guard is properly set.
NOTE: A change in stitch length will require a change in
rear needle guard setting.
THREAD TENSION RELEASE
The thread tension release is set correctly when it
begins to function as the presser foot is raised to
within 1/8 inch (3.18 mm) of the end of its travel and
is entirely released when the presser foot has reached
its highest position.
If adjustment is needed, loosen tension release
lever screw (A, Fig. 14), located at the back of the
machine and move tension disc separator as required.
Retighten screw. After adjustment there should be no
binding at any point.
11
A
l.
Fig. 14
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SETTING HEIGHT OF PRESSER BAR
The height of the presser bar (A, Fig. 15) is set correctly if it is possible
to remove the presser foot when the foot lifter lever (B, Fig. 14) is fully de-
pressed. Also there should be approximately 1/16 inch (1.59 mm) clearance between
lower surface of the presser bar connection and guide (B, Fig. 15) and the bottom
surface of head opening in the bed when the foot lifter lever is released and the
presser foot resting on the throat plate, with the feed dog down below the throat
plate.
If adjustment is needed, turn handwheel in operating direction until the
needle bar is in the low position and loosen screw (C). Then, while holding presser
foot down on the throat plate surface, pry up presser bar connection and guide with
a screwdriver to obtain the 1/16 inch (1.59 mm) setting and tighten screw. Check
setting by turning handwheel so that needle bar is in its high position and see if
presser foot can be removed as mentioned in previous paragraph.
SETTING THE PRESSER FOOT
Remove both needles (D, Fig. 15) and put presser foot (E) on to the presser
bar (A), if not already in place. Do not tighten the clamp screw (F). It should
be able to move freely on the presser bar. Place a piece of fabric in the machine
to be corded and operate the machine. This will allow the presser foot to find its
true position with respect to the guide on top of the throat plate. Now tighten
the presser foot clamp screw. Replace the needles and check for clearance in needle
hole in presser foot.
PRESSER FOOT PRESSURE
Regulate the presser spring regulating screw (A, Fig. 16) so that it exerts
only enough pressure on the presser foot to feed the work uniformly when a slight
tension is placed on the fabric. This is the knurled screw, located directly behind
the needle bar in the head of the machine. Turning it clock-
wise increases the pressure, counterclockwise acts the
reverse.
SETTING NEEDLE THREAD TAKE-UP WIRE AND FRAME EY E LET
Set the needle thread
take-up wire (B, Fig. 16),
located adjacent to the
needle bar thread eyelet
(C), so that its upper
surface is even with the
top of the holes in the
needle bar thread eyelet
when the needle bar has
completed its downward
stroke. Lower this set-
ting for a smaller needle
thread loop, and raise it
for a larger loop. Set
the needle thread frame
Fig. 15 eyelet (D) so that the
eyelet hole is 3/4 inch
(19.05 mm) above the attaching screw (Fig. 16).
12
B
Fig. 16
~==~a.--~~------~------=--------------------- ---------------- ---- ----
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THREADING
Draw t he loo per and needle threads into the machine and start operating on a
p
iece of f abr ic . R efe r to threading diagram (Fig. 3).
THREAD TENSIONS
Pull the needle thread through the eyelets and set the needle thread tension
to produce uniform stitches on the under surface of the fabric.
The looper thread tension should be set so that the tension on the looper
thread is just sufficient to steady the thread.
SETTING THE LOOPER THREAD RETAINING FINGER
The looper thread retaining finger (A, Fig. 17) located on the cast-off support
(B) contr~ls the amount of slack thread in the system and can be moved to any posi-
tion. It should be set laterally so that it is midway between the two discs of the
take-up (C) and the tip parallel with the discs.
The height and the lateral adjustment of the retaining finger affects the con-
trol of the looper thread as the looper moves to the left.
More looper thread is given to the stitch when the retaining finger is raised
and set toward the takeup. However, if it is raised too high, the looper thread
traingle may be wiped under the blade of the looper, causing triangle skips or pull-
ed down stitches. This can be checked by observing the action of the looper thread
as the looper moves to the left.
Fig. 17
13
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..
K
... ···········--------····
14
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R ef.
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
THREAD EYELETS , FEED LIFT ECCENTRIC, NEEDLE BAR, HANDWH EE L ASS E MB LY ,
LOOPER DRIVING AND LOOPER ROC KER PAR TS
Part
No.
56458 A
52170
539
56458
61434 G
29476
NM-080
22894 M
57845 B
77
39543 N
56321 J
22574
61321 L
56321 D
56321 H
22894
AB
57117
56 c
56 GV
56 v
88
52107
29105
AG
22587 K
56343 c
56343 E
22559 A
56344 c
98
719
29192
AD
51745
57113
15465 F
88
258 A
22829
96
Amt.
Description Req.
Needle Bar Thread Eyelet------------------------------ l
Needle Thread Take-up Wire ---------------------------- l
Needle Thread Frame Eyel e t---------------------------- 1
Needle Lever Thread Eyel e t---------------------------- l
Washer,
for needle guard------------------------------ l
Feed
Lift Eccentric Assembly, .080 inch (2.03 rnrn)
throw------------------------------------------------ 1
Screw--------------------------------------------- 1
Eccentric Link Assembly--------------------------- 1
Screw----------------------------------------- 1
Thrust Washer for feed bar---------------------------- 2
Handwheel
Assembly------------------------------------ l
Screw--------------------------------------------- 3
Retaining Plate----------------------------------- 1
Handwheel----------------------------------------- l
Pulley-------------------------------------------- l
Screw----------------------------------------- 2
Needle Bar, marked "EY"------------------------------- 1
Tapered Stop Pin--------------------------------- 1
Needle Wedge------------------------------------------ l
Needle Clamp Collar----------------------------------- l
Screw------------------------------------------------- l
Looper------------------------------------------------ 1
Looper Drive Lever Crank Assembly--------------------- 1
Bearing Cap Screw, upper-------------------------- 2
Ball Joint Guide Fork----------------------------- l
Oil Splasher-------------------------------------- l
Bearing Cap Screw, lower-------------------------- 2
Looper Rocker Frame----------------------------------- l
Set Screw----------------------------------------- l
Stop Screw---------------------------------------- l
Looper Rocker Assembly-------------------------------- l
Looper Rocker Cone Stud--------------------------- l
Looper Rocker, marked "AE"------------------------ l
Looper Rocker Cone-------------------------------- 1
Screw----------------------------------------- 2
Lock
Nut------------------------------------------ l
Lock Nut
Screw------------------------------------ l
Screw------------------------------------------------- l
15
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16
From the library of: Superior Sewing Machine & Supply LLC

R ef.
No .
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
PRESSER FOOT, THROAT PLATE, FEED DOG, CLOTH PLATE COVER
AND LOOPER THREAD TAKE- UP PARTS
Par t
No.
8620 K-1/8
91
8624 K-1/8
28 c
27 v
28
8605 J
57757 A
52904 G
51204
22569 D
69 H
87 u
22768
77
52904 E
50-216 Blk.
51204 A
73 A
56381-222
22845 B
22760 A
35772 H
51281 AC
Am t.
Desc ript ion Re q.
-
P resser Foot------------------------------------------ 1
Screw--------------------------------------------- 1
T
hroat Plat e ------------------------------------------ 1
Screw, for adjustin g loop retainer---------------- 1
Loop Re
tainer, marked "AY"------------------------ 1
Screw, for loop re tain e r-------------------------- 1
Feed Dog,
16 teeth per in ch (1.59 mm per tooth)------- 1
Cast-off Support Plate-------------------------------- 1
Cast-off Wire----------------------------------------- 1
Looper Thr ead Retainin g Finger------------------------ 1
Screw, for cast-off support plate--------------------- 2
Washer, for cast-off support plate screw-------------- 2
Screw, for l ooper thread re taining finger------------- 1
Screw, for retaining fing er support bracket----------- 1
Screw, for cast-off wire support---------------------- 1
Retaining Finger Support Bracket---------------------- 1
Dowel
Pin----------------------------------------- 1
Cast-off Wire Support--------------------------------- 1
Screw, for cast-off wire------------------------------ 1
Cloth Plate Cover------------------------------------- 1
Pivot Screw--------------------------------------- 1
Screw------------------------------------------- ~ - 3
Washer-------------------------------------------- 3
Cloth Plate Cover Spring-------------------------- 1
17
From the library of: Superior Sewing Machine & Supply LLC

Special
Wants to Help \bu Cut ~~-.nn
MaintenanceCosts
Union Special is offering two practical systems to
help pinpoint and reduce your sewing machine
maintenance costs: a record keeping system
to help
spotmachines requiring
abnormally high maintenance,
and a parts
inventory system to speed routine repairs.
Machine Maintenance Records
Repair-prone machines or inexperienced operators can
eat
up your maintenance dollars in short order. To help
spot these problems,
Union Special suggests two
variations of a simple maintenance record keeping
system using cards
provided by Union Special.
The first system utilizes a "Machine Maintenance
Record" card (Form 237) for each sewing machine in a
plant. When a repair is required, the card is pulled
from
the file and the repair date, parts used, and their cost
are entered in the spaces provided and the card is refiled.
MACHINE MAINT E NANC E RECORD
MAKIU I a NAM I a
TT L& TYP I N EID I.C a
«llliALN O
bAT I P U RCH
I I I I
DAT I:
a T• u to '- PART uaco .
... . OA
"'
S'I'M aCM,. P' Aft TU .. CO
COOT
I
231-
fO~~aintenance
f'<\ad"" d
dear
Recor
f.-
--- - _ . ,
.._ •a•- •• •• - ... U O .. .., ,._ ,. • • a
The second system is normally used when more
detailed information on repair costs is desired. Two
record cards are used: a "Repair Request Card"
(Form 234), and a "Machine Repair Record"
(Form 233) . When a machine requires service, the
MACHINE REPA IR RECORD CARD
. .. ...... ..
MAKER a NA MC :
t: w I
l' J ~ t> '-f lo I a &
lti AL
NUMM&" I
.. e ~ l~ftll
I
RE PA IR RE QU EST CA RD
o
..
-
DATil ... r:. u.•
~ "
~
~~ L
• A 'l ~ ~ a:
I N 'I Uof f Oft 'r O• OII G
MA • u e NAill -
MA E:)! , a &1 1" fo. NO ,
CINIIIIH I;II . NO . -
-
PART S USED
~
,• • • N v--
-·
fOlt~ 233-:rd card
f.-
air Rec
234-
hl'\e ReP
f-
-
f'<\aC I
fOlt~ uest card
ai<Re<\ ~-
ReP - 1----
TIMC aT ... Itn:o
11 WC CO M "'-CTII D
"'IC:HA NIC: 8 NO -- Hflfil ,- -
·-- _ , _ ·- ·- -- ":::" !" ; : ':
forelady or foreman fills out the top of a "Repair
Request Card" and gives it to a mechanic. He fills in
the
time the repair work is started, the parts used and
their cost, and the completion time .This data is then
transferred
to the permanent "Machine Repair Record"
kept in the office.
Whichever system
is used, management now has an
invaluable tool to reduce needless maintenance costs.
Repair Part Inventories
While record keeping tells management which
machines require
abnormally high maintenance, it doe s
little
to help reduce the downtime caused by routine
repairs. To alleviate this situation,
Union Special
recommends that manufacturers establish a formal
parts inventory system for each type of sewing
machine they operate.
Excessive machine
downtime and wasted hours by
mechanics can be eliminated with an orderly in-plant
inventory of the most commonly needed parts. There
is
no longer a need to cannibalize other machines for
spare parts. Long waits for deliveries are avoided and
machine
downtime is kept to a minimum. The cost of a
parts
inventory is small when the overall savings are
considered.
Style 39500 QB
Part Number
39520A
39530
3959711
3 9524 B 3/32
or
39524 B 1/B
22524
3 9526 B
3950 5 B
39 5 05
22528
93 11
22797 A
39!! 70
14077
39549
2258 8 A
39508 B
3950811
225646
39551 F
14077
22596 E
21225 1/8
154 GAS
Description Minimum Spare
Parts Per Machine
Presser foot
Presser foot h.nge spr .ng
Presser foot sti tch tongue marked "OS"
Throat plate markPd "V - 3/32 "
or
Throat plate marked "V · I/8"
Throat plate screw
Differentoal feed dog.
16 teeth per inch
Matn feed dog marked B. I I' • eth per inch
Chai nong feed t~~- G
ScrPu• • 1"\~\...'-"
sJ\ \)aftS \..\St
l s-pat'e
N . ..pper knife clamp stud
Lower
knofe
Screw for lower knife clamp
Lower looper
Upper looper marked "CC"
Screw for upper looper
Needle clamp stud
Nut for needle clamp stud
Screw for needle d ro ving arm
Looper guage
Needles (spec•fy size)
I
2
1
I
I
2
I
I
1
2
2
2
4
1
4
1
1
1
2
1
1
2
1
100
For free sample copies of the machine record cards
and spare part inventory lists for a variety of the most
popular machines, contact your local Union Special
Representative
or write direct to Union Special.
From the library of: Superior Sewing Machine & Supply LLC

Here are
Oil Specifications
for Union Special
Sewing Machines
Specification 174 specifies a high quality pet-
roleum oil, viscosity 100 seconds at 100°F. Recom-
mended for all oiling applications on high speed
machines.
Specification 175 specifies a high quality pet-
roleum oil, viscosity 100 seconds at 100°F., water
white or with a maximum A.S.T.M. color number of
1. For use where freedom from oil staining is para-
mount
Specification 87 specifies a high quality pet-
roleum oil, viscosity 300 seconds at 100°F.
Specification 100 specifies a general purpose
high
quality grease for use in ball bearings and trans-
mitters. It is similar to commercial 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
Flash (Min.)
Pour (Max.)
Color A.S.T.M. (Max.)
Neutralization No. (Max.)
Viscosity Index
(0 & D Min.)
Compounding
Copper Corrosion (Max.)
*Anline No.
90-125
350
20
3
0.10
85
90-125 300-350
350 350
20 20
1 3
0.10 0.10
85 85
None None None
1A 1A 1A
175-225 175-225 175-225
*Used with Buna N Rubber "0" Retainers
NOTE 1: The use of non-corrosive additives in oils
meeting above classification is desirable but not
essential. These may include:
1. Oxidation inhibitors
2. Rust inhibitors
3. Lubricity additives
4.
Anti-oxidants
5. Film strength additives
These additives must be completely soluble in the oil
and not removable by wick feeding nor shall they
separate.
NOTE 2: Oils containing the following type additives
shall not be used at any time:
1. Extreme pressure additives-corrosive
2. Tackiness or adhesive additives
3. Lead soap
additives
4. Detergents
IIN!SI QUAIIIY
UNION SPECIAL
CORPORATION
From the library of: Superior Sewing Machine & Supply LLC

'
...
q
..
p.llf
.,.o
WORLD'S FINEST QUALITY
*
INDUSTRIAL SEWING MACHINES
,,
'"
UNION SPECIAL maintains sales and service
facilities throughout the world. These offices will
aid you in the selection of the right sewing
equipment for your particular operation. Union
Special representatives and service men are fac-
tory trained and are able to serve your needs
promptly and efficiently. Whatever your loca-
tion, there is a Union Special Representative to
serve you. Check with
him today.
ATLANTA, GA.
MONTREAL, CANADA
BOSTON, MASS.
TORONTO, CANADA
CHICAGO,
ILL.
BRUSSELS, BELGIUM
DALLAS, TEXAS
LEICESTER, ENGLAND
LOS ANGELES, CAL.
LONDON, ENGLAND
NEW YORK, N.
Y.
PARIS, FRANCE
PHILADELPHIA,
PA.
STUnGART, GERMANY
Representatives and distributors In all Important
I ndustrial cities throughout the world.
UNION SPECIAL CORPORATION
400 N. FRANKLIN ST., CHICAGO, ILL. 60610
From the library of: Superior Sewing Machine & Supply LLC