UnionSpecial Columbia 100X Parts list manual

FI NE ST
S TYLES
1 00 X
l OO XA
CATALOG
No.
122M
Second
Edition
Price $1.00
ZVni.m~
L E W I S® • C 0 L U M B I A®
INDUSTRIAL
SEWING
MACHINES
CLASS 1 00
COLUMBIA
S
TREAMLINED
S ADDLE STITCH MACHINE
UNION SPECIAL CORPORATION
CHICAGO
From the library of: Superior Sewing Machine & Supply LLC

Union Special is offering two practical systems to help pinpoint and
reduce
your sewing machine maintenance costs: a record keeping
system
to helpspot machines requiring abnormally high maintenance,
and a
parts inventory system to speed routi ne repairs.
Machine Maintenance Records
Repair-prone machines
or inexperienced competent operators can eat
up
your maintenancedollarsin short order. To help spotthese problems,
Union Special suggests
two variations of a simple maintenance
record keeping system using cards provided by Uni
on 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 costareenteredinthe spaces providedand thecard isrefiled.
MACH IN IE MAI ~ AN C& RECORD
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The secondsystem is normallyused 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 servi ce, the 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,
Part
Number
C1015 XA
22n5
1580 F-13
22743
22818
C1016 X
C1016 Y
22768
C1017 X
376
29-C150 XA
29-C151 XA
HA73 B
C2018 X-6
Description
Presser Foot, Main Section
Screw for Presser Foot
Roller
Set Screw for Roller
Screw for Roller
Feed Dog, Rubber Faced
Feed Dog, Toothed
Screw for Feed Dog
Throat Plate
Screw for Throat Plate
Eye Needle (specify size)
Hook Needle (specify size)
Needle Set Screw
Needle Guide
Minimum Quantity
Per 5 Machines
1
1
2
1
2
200
200
2
•The parts and quantit i es li sted above are i ntended to assist you in sett 1 ng up the init i al
i nventory of spare parts . An effic i ent i nventory can only be estab l ished according to
actual usage . The nature of the seWing operat i on will determ i ne actual usage.
andthecompletiontime.Thisdata is thentransferred to the perm anent
.. Machine Repair Record"" kept in the office.
Whichever system is used, management
now has an invaluabl e tool
to reduce needless maintenance costs.
Repair
Part Inventories
While record keeping tells management which machines require
abnormallyhighmaintenance,
it doeslittle to helpreduce 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-plantinventory of the most commonly
needed parts.There is no longera need to cannibali ze 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.
MACHIHI: REPAIR ftKCOftD CARD
~ ..
r :: w I R
llP A IR Ra OU UT CA ft D 1-
............... -
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I ~
I
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.... ... .._
-., - ... MO 1-
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II II:C..O AN IC I HO -- M· --
- -- - - -- -
For free sample cop1es of the machine record cards and spare part
inventorylists
for a variety of the mostpopular machines, contact your
local Union Special Representative or write direct to Union Special.
Style 100 X-XA
Suggested Minimum Spare Parts List *
Part
Number Description Minimum Quantity
Per 5 Machines
1170 L
C1008 X
18-644
C1009 X
161470 F
61453
C1018 X
605
29484
Screw for Needle Gurde
Looper Hook
Screw for Looper Hook
Looper Needle Guard Plunger
Needle Bar Bushing Thread Guide
Take-up Spring
Thread Retainer
Screw for Retainer
Screw Assortment
Style 100 XA
C1015 XC Presser Foot
18 -758 Needle Set Screws
29 DHD-110/044 Hook Needles (specify size)
2
1
2
1
1
3
1
2
1
1
2
200
From the library of: Superior Sewing Machine & Supply LLC

October, 1977
Catalog No. 122 M
LIST OF PARTS AND INSTRUCTIONS
FOR
OPERATING AND ADJUSTING
CLASS 10 0
COLUMBIA
STREAMLINED SADDLE STITCH
MACHINE
Styles
100 X 100 XA
Second Edition
Copyright 1963
By
Union Special Corporation
Rights Reserved in All Countries
UNION SPECIAL CORPORATION
INDUSTRIAL SEWING MACHINES
CHICAGO
Printed in U.S.A.
3
From the library of: Superior Sewing Machine & Supply LLC

FOREWORD
The dominating idea back of" Union Special
11
is to build the best industrial sewing
machines in the world. The streamlined saddle stitch machines are a pronounced
achievem e nt along these lines. All parts are made to precision gauges, insuring
complete interchangeability. A few of the outstanding features are:
1. Streamlined design. Pleasing in appearance, this natural functional design
provides greater stability and ruggedness, free from difficult-to-clean recesses.
2. Simplified oiling. Automatically supplies oil to lower main shaft bearings, feed
rocker and feed lift bearings.
3. Push button control, for quick, easy adjustment of stitch length, with a stitch
length indicator of the comparison type, using letters as a means of reference,
to predetermine stitch lengths.
It is our constant aim to furnish carefully prepared information that will enable
the customer to secure all possible economies and advantages from the use of
UNION SPECIAL machines. The following pages contain valuable operating and
adjusting data and illustrate and describe the parts for Styles 100 X and 100 XA
streamlined saddle stitch machines.
Union Special representatives w~ll be found in all manufacturing centers, ready
to cooperate with you to plan and estimate requirements.
UNION SPECIAL CORPORATION
Engineering Department
4
From the library of: Superior Sewing Machine & Supply LLC

IDENTIFICATION OF MACHINES
Each UNION SPECIAL machine carries a styl e number which is stamped in th e
name plate on the machine. Style numbers are classified as standard and spec ia l.
Those which are standard have one or more lett e rs suffixed, but never contain th e
letter "Z ". Example: "100 X". Style numbers containing the letter "Z" are special .
Styles of machines similar in construction ar e grouped under a class numb er
which differs from the style number in that it contains no letters. Example: "Clas s
100 ".
The serial number of the machine is stamped on the back of the column at cloth
plate level.
APPLICATION OF CATALOG
This catalog applies only to the standard styl es of machines as listed herein.
All references to directions, such as right and left, front and back, etc., are taken
from the opera tor's position while seated at the machine. The direction of rotation
of the handwheel is toward the operator.
DESCRIPTION OF MACHINES
100 X Streamlined saddle stitch machine, for decorative stitching on shoes, hand-
bags or other leather articles. Needle travel 15/16 inch. Stitch range 3 1/2 to
5 1/2 per inch. Maximum recommended speed 1500 R. P.M.
100 XA Streamlined saddle stitch machine, for decorative stitchin g on medium
weight knit goods. Needle travel 15/16 inch. Stitch range 3 1/2 to 5 1/2 per
inch. Maximum recommended speed 1500 R. P.M.
INSTALLING
Each machine, as it leaves the factory, is sewed off, inspected, and carefully
packed. When the machine reaches the customer, it is ready for service. Because
of all the precautions taken by those who handle the machine, the customer needs
only to place it in its proper position in the table and make only the ordinary settings
to adapt the machine to the material he wishes to sew.
STANDARD ACCESSORIES
Included with each machine is a box of standard accessories containing one drip
pan, oil drain jar and clamp spring, one knee lifter assembly and rubber pad, one
spool pin, two hinge studs, one machine rest pin, two hinge plates and screws, four
felt pads and necessary nails. These parts are indispensable when setting up the
machine.
TABLE TOPS
MachineStyles 100 X and100 XA maybe installed in table top No. 21371 WD-48,
prepared with cut-out so that the bed plate is flushwith the top of the table. Isolated
mounting parts are included with the table top. For table tops not prepared for isola t-
ed mounting, use the felt pads and nails furnished with the accessories.
When assembling the hinge plates to the table tops, be sure to locate them a s
accurately as possible, so that the hinge studs, attached to the machine, can swing
properly in the plates.
Special care should be taken that the machine does not contact the sides of the
cut-out at any point.
5
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INSTALLING (cont i nu e d)
K NEE PRESS
The kn ee p ress is attached to UNION SPECIAL table tops at the location desig-
nat ed by punch ma r ks on the underside. For other boards, locate the knee pr e ss so
th a t t he cent er of t he shaft is 8 1/4 inches from the right side of the cut-out. Th e
kn ee press as se mbl y should appear as in (Fig. 1).
DRI P P AN
The dr ip pan is at tached to UNION SPECIAL
tabl e t ops at th e indentation marks on the in-
s ide of the cu t -ou t, using the nails furnished
with the acc e ssori e s. For other table tops,
th e drip pan should be set high enough to clear
th e kn ee press a nd low enough to clear the
bottom of the machine. It should be laterally
located so that it is directly under the base of
the machine.
BELTS
These machines are equipped to use either
No. 1 "V" or round belt.
LUBRICATION
CAUTION!!
Fig. 1
The oil has been drained from the main reservoir and the hook shaft gear case
before shipment. and these reservoirs must be filled before starting to operate.
Lubricate machine thoroughly in accordance with instructions and run slowly for
several minutes to di stribute the oil to the various parts. Full speed operation can
then be expected without damage.
RECOMMENDED OILS
Use a straight mineral oil of a Saybolt viscosity of 90 to 125 seconds at 100°
Fahrenheit in main reservoir and hook shaft gear case. This is equivalent to UNION
SPECIAL oil specification No. 175.
Oils conforming to specification No. 175 may also be used in the manually oiled
places.
For trouble free operation, oil the machine as indicated in the diagram (Fig. 2).
With needle bar at the top of its stroke, oil the holes (A) twice daily. In oiling
hole (B), very little oil should be used and only around the outer edges of the needle
bar. Do not put oil into the hole in the needle bar, as it will flow out when machine
is operated at high speed. A can of oil, No. 28604 R. is included with the accessories
packed with the machine. It contains a sufficient quantity to fill both reservoirs.
The main reservoir is filled through oil cup (C) and the supply is usually replenished
about twice a month. However, the oil level should be checked from time to time
and kept between the lines on the gauge (D).
The hook shaft gear case is filled at the plug screw hole (J). A quantity of oil
sufficient to bring the level up to the plug screw hole, when the machine is tilted
back against the rest pin, should be used. Remove plug screw and check the level
of oil about every six months.
6
From the library of: Superior Sewing Machine & Supply LLC

Fig. 2
7
From the library of: Superior Sewing Machine & Supply LLC

LUBRICATION ( co nt i nu ed)
AU TIO N !!
Do not u se a com p oun ded oil in th e feedin g drive shaft g ear case or hook shaft
g ear case , as th ese o il s s e pa ate and fr oth.
Lubr ic at i on of m o st of th e mechanism
be low th e bed pla te is automaticall y
acc ompli shed throu gh the fe ed drivin g
s
haft wh ic h is tubula r . Oil is introduc ed
i
nto th e s haft at th e ge ar en d by means of
an oil dis tributin g pl ate (A, Fig. 3) which
is s ec ur ed to th e la r ge ge ar case cov er
(B) by m e
an s of two sc rews (C) and
re ta i nin g blo ck (D).
Should it ever be come necessary to
re mov e an y of th e part s from the gear
ca se , it is imp e rat i ve that the adjustment
of t he oil d is tributing plate be checked
v ery c ar e full y. This can be done by re-
movin g th e lar ge plug screw at the right
e nd of th e ge ar housing and looking
c
D
Fig. 3
thro ug h th e hol e. The low point of the oil distributing plate must be even with or
s li g htl y be low th e center of shaft (E) and just touching it. This is a very important
adju s tm e nt a s the functioning of the automatic lubrication of the lower part of the
ma chi ne depe nds upon it.
The hook dr i ving mechanism, below the bed plate, is manually lubricated, and
the o il ing plac es are indicated at (H. K, L, M, N, P, and R, Fig. 2). A few drops
da il y at th ese points will be sufficient.
NEEDLES
Use only genuine UNION SPECIAL Columbia needles.
The recommended needles for these machines are Type 29 DED-110/044 eye
needle and Type 29 DHD-110/044 hook needle. The minor number following the Type
symbol indicates the size.
These needles are also available in the following sizes:
SIZE
EYE
NEEDLE
HOOK
NEEDLE
INCHES MM.
29 DED-090/036 29 DHD-090/036 • 036
29 DED-100/040 29 DHD-100/040 • 040
29 DED-125/049 29 DHD-125/049 • 049
Styles 100 X and 100 XA are set with 29 DED-110/044
29 DHD-110/044 hook needle and No. 24-4 cotton thread.
.90
1. 00
1. 25
eye needle and
To have orders promptly and accurately filled, an empty container, a sample
needle. or the type and size number should be forwarded.
8
From the library of: Superior Sewing Machine & Supply LLC

OPERA TOR'S INSTRUCTIONS
INSERTING THE NEEDLES
Insert the needles in the needle bar as far as they will go, with the spots or
scarfs to the right, and with the eye needle in the front hole and the hook needle in
the rear.
THREADING
Thread machine in accordance with threading diagram (Fig. 2).
NEEDLE THREAD TENSION
The needle thread tension is varied by turning the tension regulating nut (E, Fig. 2).
Turning the nut in a clockwise direction increases the tension and counterclockwise
decreases the tension. This should not be done when the presser foot is in its raised
position, and is generally done while the machine is sewing on a piece of scrap
material.
LENGTH OF STITCH
The showing stitch remains the same, but the space between the stitches changes
when setting for a longer or shorter stitch. The total leng'~h of stitch can be set from
approximately 3 1/2 to 5 1/2 stitches per inch.
TO CHANGE THE STITCH LENGTH
Press plunger (F, Fig. 2) in firmly. While holding plunger in, turn handwheel
in operating direction until stitch regulating finger is felt to drop into the slot of
feed eccentric. Continuing to hold the plunger in, turn handwheel in operating
direction to increase the stitch length and in opposite direction to decrease the stitch
length.
Comparative stitch lengths are indicated by the graduations on the dial (G) in bed
plate, ranging from S (short) to L (long). Release the plunger.
The stitch regulating plunger may be locked at any setting by means of the locking
screw located on the underside of the bed plate lip directly below the plunger.
Fig. 4
PRESSURE ON MATERIAL
The presser spring should exert only enough
pressure to make the work feed uniformly.
To increase the pressure on the presser foot,
turn the presser spring regulator (A, Fig. 4) in
clockwise direction. Turning the regulator counter-
clockwise decreases the pressure.
9
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MECHANIC'S INSTRUCTIONS
SETTING THE NEEDLE BAR TO HEIGHT
The low er n eedle bar bushing. the one to which the needle bar is timed. is s et at
th factory. Th e distance from the bottom of th e bushing
tothethroatplat eseat is 2.298 (2 19/64)inches(Fig. 5).
When the needle bar is in its lowest position. the
upper timing lin e on the needle bar should be even with
the lower edge of the needle bar bushing. To change the
position of the needle bar. turn the hand wheel in operating
direction until th e needle bar is in its lowest position.
then. loosen the clamp screw (A) and move the bar to
the proper timing line.
FEED DOG HEIGHT
In regulating the height of the feed dog, it should be
in its highest position with the presser foot resting on it.
When using a rubber faced feed dog, the top of the feed
should extend 3/64 inch above the surface of the throat
plate. When using the toothed feed dog, the full depth
of tooth should extend above the surface of the throat
plate.
To make these adjust-
ments, loosen screw (A,
Fig. 6) and turn regulating
screw (B) clockwise to
•
Fig. 5
raise the feed dog and counterclockwise to lower it.
Make sure that the bottom of the shank of the feed dog
holder rests against the head of the regulating screw.
The feed dog can be tilted up or down by loosening
screws (A and C) and can be moved forward or backward
in the throat plate by loosening screws (D).
Fig. 6
PRESSER FOOT HEIGHT
With the feed dog at the
lowest point of its travel, set
the presser foot height so that
there is 3/16 inch space be-
tween the bottom of the foot and
the top of the throat plate with
the hand lifter lever in the
11
up"
position.
To make this adjustment, loosen screw (A, Fig. 7), and
with the hand lifter (B) up, move the presser bar (C) to secure
proper height of presser foot and retighten screw (A).
~~~~
The roller (D) should be set from. 020 to • 040 inch below ---~~
the bottom of the presser foot, depending on the weight of the
material being sewn and the radii of the turns being made.
10
Fig. 7
From the library of: Superior Sewing Machine & Supply LLC

Fig. 8
MECHANIC'S INSTRUCTIONS (continu e d)
PRESSER BAR CONNECTION
The presser bar connection (A, Fig. 8) should be
set so that it is 1/16 inch from the hand lifter (B) at
all times.
This is accomplished by turning the machin e ov er
on its side. loosening lock nut (G, Fig. 9) and relocatin g
the stop screw (E) onthelifterleverbellcrank(F). By
turning the stop screw counterclockwise, the presser
bar connection is brought closer to the hand lifter. Turn
the stop screw to secure desired 1/16 inch spac e.
Tighten lock nut (G) to lock screw in position.
PRESSER BAR GUIDE
When locating the presser bar guide (C, Fig. 8),
the presser foot must rest directly against the throat
plate with the feed dog in its lowest position.
The guide is properly set when there is a 1/16 inch space between presser bar
guide and the connection.
To obtain this setting, loosen set screw (D) in
the guide and insert screw driver between the
connection and the guide. Tap on presser foot to
insure its being down on the throat plate. center
the foot by turning it so that needles enter the
middle of their slot and retighten screw (D) in
guide.
NEEDLE GUIDE BAR
Fig. 9
The needle guide bar must be set so that when
the needle guide contacts the throat plate, the bar continues to descend about
another 1/3 2 inch.
This adjustment is made by loosening screw (A, Fig. 10) and moving bar to
Fig. 10
desired height. Note: This is a socket head set screw.
THREAD CONTROL
Test check spring tens ion (A, Fig. 11). There should
be enough tension to insure a good returning snap when
spring is depressed and released. Should it r equire
adjusting, loosen set screw in the head on right side of
tension post (G, Fig. 13) and remove tension post
assembly. Partially loosen tension post set screw
(B, Fig. 11) in ten s ion post sock et (C). Holding the
socket in the left hand, turn the tension post (D) counter-
clockwise with the ri g ht hand until the check spring moves
away from the upper s top (E) and has no tension on it.
Turn the tension po st (D) in a clockwise direction until
the spring again touche s the upper stop (E). Then, proceed
further in the same direction until the desired tension is
obtained. When correctly set, the ten s ion post set s crew
(B) should be drawn up snu g ly, but not forcefully.
11
From the library of: Superior Sewing Machine & Supply LLC

MECHANIC 'S INSTRUCTIONS (continu d)
THREAD CONTROL (continued)
Furt h er ad justm e nt of th e ch ck s pr ing tension
can be mad e by ins e rting a sc r ew dr iver i nt o the
s lotted e nd of the tension post (D) and turnin g in the
r e quired d irec tion.
Fig. 11
Replace te nsion ass embly with th e check spring about 3/8 inch above the thread
take-u
p w ire . Whil e the tens i on post assembly is being replaced, the presser foot
should be resting on the throat plat e.
The f
ram e take-up eyelet (A, Fig. 12) should be set at its highest position.
For th e final setti ng of check spring, sew slowly on a piece of material and
obser ve the action of the check spr i ng. The spring should have completed its travel
and rest against its stop as the needle bar reaches the
bottom of its stroke.
LOCATING TENSION RELEASE MECHANISM
The tension assembly should be located in bed from
front to back, so that, when the presser foot is raised to
its highest position, the tension (F, Fig. 13) is opened just
enough to allow the thread to pass the discs freely.
To position the tension assembly, see that set screw in
bed (G, Fig. 13) is loose and tension assembly adjusting
screw (B, Fig. 12) is screwed down to the bed.
Lift the presser foot hand lifter to its highest position.
Fig. 12 With the left hand, grasp the thread and pull it through the
tensions; with the right hand, push tension post deeper into
the machine until release pin (H, Fig. 13), pressing against the presser bar
connection (J), has opened the tens i on discs just enough to allow the thread to pull
through freely. Re tighten set screw (G), turn tension assembly adjusting screw
(B, Fig. 12) counterclockwise until it contacts the flange of the tension post socket.
SETTING THE HOOK ON THE CARRIER
Set the hook (A, Fig. 14) high on the carrier, and tilt forward as far as it will
go. Loosen screws (B) to make this adjustment.
The hook needle guard (C) guards the right side
of the needle and has no adjustment.
When adjusting the hook, make sure that it
does not contact the bottom of the plunger.
TIMING THE HOOK
Turn the hand wheel in its operating direction
until the needle bar has reached the bottom of
its stroke. Continue to turn the handwheel until
the needle bar has risen to where the hook
timing line (A, Fig. 15) is even with the bottom
of the needle bar bushin g. At this time, the
point of the sewing hook (B) should be even with
the center line of the eye needle.
12
Fig. 13
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MECHANIC
1S
INSTRUCTIONS (cont i nu d)
TIMING THE HOOK (continued)
The foregoing adjustment may be made by loos e nin g th e
three screws (E, Fig. 18) in the hook driving barrel (C) a nd
rotating the barrel until the above condition is satisf ie d.
Set the hook point as close as possible to the eye ne e dl e
without contacting it. This is done by loosening the All en
head set screw located in the lower bracket. Move the sewi ng
hook shaft bushing either to the left or right to locate th e
sewing hook properly. Retighten the
Allen head set screw.
TIMING THE PLUNGER
The plunger should be set. 005 inch
from the hook needle. Loosen the
Fig. 14 plunger block holder screw (D,
Fig. 14) and move the block in the
required direction to secure this adjustment.
Set the plunger so that its vertical portion (A, Fig. 16)
extends 5/64 inch beyond the left side of the needle at its
furthest point of travel to the left.
This adjustment is made by loosening clamp screw (B)
and turning slotted shaft (C) in the required direction.
THROAT PLATE NEEDLE GUARD
The throat plate needle guard (A, Fig. 17) is used to guard
the left side of the eye needle and to prevent it from being Fig. 15
deflected away from the point of the hook. Only a limited
amount of adjustment is required and is obtained by loosening the two screw s (B)
and moving the guard.
Fig. 16
STITCH FORMATION
Place material under presser foot and threa d
machine. Lay machine on its side and turn
handwheel in operating direction. Observe how
the thread is carried between the needles i nto
the hook needle by the plunger. As the thread is
released by the hook and the plunger, it is drawn
up by the take-up, and the feed motion completes
the stitch. Any burr or sharp groove on the
plunger or sewing hook must be removed.
To turn the material at any desired corne r
or point, turn the handwheel in operatin g
direction until the point of the hook needle is
1/16 inch above the material and make turn.
For a square corner, it will be best to rai se the
foot.
13
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MECHANIC'S INSTRUCTIONS (continued)
HOOK CAHRIER BHACKET
Sho uld it b ec om e necessary to replace e it he r the hook carrier
brac ket (A, Fig. 18) or the shim gasket (B) for it, it is extremely
i mpo r tant that th e proper distance between the hook barrel (C) and
hook carr i er bushing (D) be maintained. Use a micrometer to
ch ec k thi s dim e ns i on as shown at "X'' in the illustration. This
dime nsion is 1. 370 inch plus or minus . 005 inch.
In ord er to ac hieve this adjustment, it will be necessary to
se l ec t shim gask e ts of the proper thickness to use between the
hook c arrier bracket (A) and the bed casting. Shim gasket part Fig. 17
numb e rs are 61482 R-3 and 61482 R-10 with a thickness of • 003
and . 010 inch respectively. At least one shim gasket must be used to prevent oil
leakage.
MACHINE TIMING
If at any time the machine is disassembled, it
will have to be ret i med as follows:
1. Lay machine on its side on the bench.
2. Remove the large gear housing cover.
Note: Caution should be observed that machine
is tilted far enough back so oil will not leak out.
Also, be careful in removing the housing cover
that the gasket is not mutilated.
Fig. 18
3. Loosen screws (B, Fig. 19) and slide gear (A)
to the extreme right so it is out of mesh with the
idler gear (D).
4. Looking through the stitch length indicator window on the top of the bed plate,
rotate the lower main shaft (C) in the operating direction until the timing mark
11
T" appears between the pointers of the indicator window. Then, rotate upper
main shaft in the operating direction until the needle bar reaches its highest
position and has descended 1/32 inch. Carefully turn
gear (A) without disturbing the lower main shaft setting
until the set screw lies directly above the flat in the lower
main shaft. The gears should then be engaged as closely
as possible in this position. While holding the gear and
thrust collar (E) tightly between thumb and forefin g er,
tighten set screw against flat in shaft securely. Then,
tighten the second set screw and check to see that there
is no end play in the shaft, and that the machine revolves
freely.
If, after making the above adjustments, the needle bar is
not in its desired position when the timing mark is in the
window, further adjustment may be made by using the
slotted segment located on the counterweight in the head
of the mach i ne (Fig. 20). Loosen the two screws (B)
holding the counterweight to the shaft, and also loosen the
two screws (A) holding the se g ment to the counterweight.
14
Fig. 19
From the library of: Superior Sewing Machine & Supply LLC

MECHANIC'S INSTRUCTIONS (continued}
MACHINE TIMING (continued}
4. (continued}
Rotate the handwheel until the ti ming line appears in the window. Hold th e
handwheel in this position and turn the counterweight on the shaft until the needl e
bar is in the desi r ed position. Retighten the screws. If at any time the abov e
adjustments are made, it will be necessary to reset the sewing hook.
5. Clean, dry, and re-seal gasket and housing cov er us ing gasket cement.
6. Replace housing cover. Check position of oil distributing plate. This can be
done by removing the large plug screw at the right end of the gear housing and
looking through the hole. The low point of the oil distributing plate (A, Fig. 21}
must be even with or slightly below the center of shaft (E) and just touching it.
This is a very important adjustment, as the functioning of the automatic
lubrication of the lower part of the machine depends upon it.
c
Fig. 20 Fig. 21
15
From the library of: Superior Sewing Machine & Supply LLC

USEFUL SUGGESTIO NS
If th e ma chine fails to work satisfactorily, thou gh appar e ntly in good r e pa i r, it
is po ss ibl e that som e minor trouble exists. For thi s r e ason, de lay may be avoid ed
by
ac ti ng on th e follow ing:
1. Se e that th e n ee dl es ar e se t prop e rly; th at they are the recommended needl e s;
that th ey a re s tr aig ht and fr ee f rom n ic ks and rough places; that they ar e •
i
nsert ed in th e n ee dl e bar a s far up a s th ey will go; and that there is clearanc e
a
ll around n ee dl es a s th ey e nt er th e th r oat plate.
2. Se e that th e m ac hine is thr e ad ed c orr ec tl y and the needle thread is delivered to
th e machin e prop e rly.
3. See that th e prope r te ns i on is appli ed to th e thread.
4. See that th e pr es se r foot is se t so that th e ne edles do not strike it.
5. See that the needles do not bind in the needl e guide.
6. See that the feed dog is not striking the hook or throat plate.
7. Take off throat plate and remove accumulated lint from feed dog slots and hook.
8. See that there are no nicks or cuts in the wall of the throat plate needle hole.
String out this hole with fine emery cord or cloth.
9. See that the take-up spring acts freely, is not grooved or nicked. Remove any
gummy oil and dirt around tension discs.
10. See that the point of the hook is not blunted, broken or nicked.
11. See that the hook is timed correctly.
12. See that the feed is timed correctly.
13. See that the plunger is set correctly.
14. See that all screws are tight.
ORDERING REPAIR PARTS
ILLUSTRATIONS
This catalog has been so arranged as to simplify the ordering of repair parts.
Exploded views of the various sections of the mechanism are shown so that the parts
may be seen in their actual position in the machine. On the page opposite the
illustration will be found the listing of the parts with their part numbers, descriptions
and the number of pieces required in the particular view being shown.
The numbers in the first column are reference numbers only and indicate the
position of the part in the illustration. The reference number should never be used
in ordering parts. Always use the part number shown in the second column.
16
From the library of: Superior Sewing Machine & Supply LLC

ORDERING REPAIR PARTS (continued)
Those component parts of sub-assemblies which can be furnished for repairs are
ind i cated by the fact that their descriptions are indented under the descriptions of the
main sub-assembly. Example:
46
47
48
61149
95
96
Stitch Length Indicator-------------------------------------- 1
Set Screw---------------------------------------------- 1
Time Spot Screw---------------------------------------- 1
In those cases where the parts for the var i ous styles in Class 100 are not the
same, the difference will be shown in the illustrations and descriptions. When a
part is used in all machines covered by this catalog, no machine style will be
mentioned.
At the back of the book will be found a numerical index of all the parts shown in
this book, which will facilitate locating the illustration when only the part number is
known.
IDENTIFYING PARTS
Where the construction permits, each part is stamped with its part number.
Some of the smaller parts are stamped with an identification letter to distinguish
them from parts similar in appearance.
All part numbers represent the same part, regardless of the catalog in which
they appear.
USE GENUINE NEEDLES AND REPAIR PARTS
Success in the operation of these machines can be secured only by the use of
genuine UNION SPECIAL Needles and Repair Parts as furnished by the Union Special
Corporation, its subsidiaries and authorized distributors. They are designed accord-
ing to the most approved scientific principles, and are made with the utmost pre-
cision. The maximum efficiency and durability are assured.
Genuine repair parts are stamped with the Union Special trademark, US Emblem
which is your guarantee of the highest quality in materials and workmanship.
TERMS
Prices are strictly net cash and subject to change without notice. All shipments
are forwarded at the buyer's risk f. o. b. shipping point. Parcel Post shipments are
insured unless otherwise directed. A charge is made to cover the postage and
insurance.
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From the library of: Superior Sewing Machine & Supply LLC

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From the library of: Superior Sewing Machine & Supply LLC

Ref.
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
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
f\0
MAIN FRAME, MISCELLANEOUS BUSHING, COVERS AND PLATES
Part
No,
B61382 H
22569 B
61293
61393 c
666-126
666-127
666-20
61393 B
61272
61394
AE
666-104
61490
50-558 Blk.
22539 D
61245 G
22597 A
50-568 Blk.
61432 B
22597 A
61449 H
22863 B
22585 A
C2028
61432 D
61341 D
61432 E
95
61341 c
61432 c
61293 N
61490 A
22570 A
61271
C2012
61454
61470 F
61457 c
61402
91 A
61273
Cl017 X
605
Cl018 X
376
61492 A
89
22597 E
61492 z
61292 G
61453
109
61292 H
61492 J-9
61292 c
22570 A
61382 J
61282 D
61394 R
61394 Q
61394 p
Description
Am t,
Re
q.
HeadCover-------------------------------------------- 1
Screw------------------------------------------------- 2
Oil Tube ---------------------------------------------- 3
Oil Tube ---------------------------------------------- 1
Oil Wick, for No, 61293 -------------------------------- 3
Oil Wick, for No. 61393 C ------------------------------ 1
Oil Wick ---------------------------------------------- 2
Oil Tube ---------------------------------------------- 1
Needle Thread Guide Pin-------------------------------- 1
Oil Cup----------------------------------------------- 1
Oil Wick ---------------------------------------------- 1
Main Shaft Bushing, right------------------------------- 1
Plug-------------------------------------------------- 1
Plu g Screw-------------------------------------------- 1
Stitch Regulator Thumb Screw Locking Insert ------------- 1
Screw------------------------------------------------- 1
Oil Sight Gauge ---------------------------------------- 1
Feed Driving Shaft Bushing, right------------------------ 1
Screw------------------------------------------------- 1
Stitch Regulator Indicator Window------------------------ 1
Tension Assembly Adjusting Screw----------------------- 1
Screw------------------------------------------------- 2
Thread Eyelet ----------------------------------------- 1
Feed Drivin g Shaft Oil Retaining Bushing, right ----------- 1
Hook Shaft Bushing, right------------------------------- 1
Feed Driving Shaft Oil Retaining Bushing, left------------- 1
Screw------------------------------------------------- 1
Hook Shaft Bushing, left -------------------------------- 1
Feed Driving Shaft Bushing, left------------------------- 1
Plug, for inside of arm--------------------------------- 2
.Main
Shaft Bushin g, left -------------------------------- 1
Screw------------------------------------------------- 1
Thread Eyelet ----------------------------------------- 1
Guide Bar Bushing ------------------------------------- 1
Needle Bar Bushing, lower------------------------------ 1
Needle Bar Bushing Thread Guide------------------------ 1
Presser Bar Bushing, lower ---------------------------- 1
Bed Slide---------------------------------------------- 1
Screw--------------------------------------------- 2
Bed Slide Spring------------------------------------ 1
Throat Plate------------------------------------------- 1
Screw--------------------------------------------- 2
Thread Retainer------------------------------------ 1
Screw------------------------------------------------- 2
Tension Post Socket------------------------------------ 1
Set Screw --------------------------------------------- 1
Set Screw --------------------------------------------- 1
Tension Post ------------------------------------------ 1
Tension Release Pin------------------------------------ 1
Take-up Sprin g ---------------------------------------- 1
Tension Disc------------------------------------------ 2
Tension Release Washer-------------------------------- 1
Tension Sprin g ----------------------------------------- 1
Tension Nut ------------------------------------------- 1
Screw------------------------------------------------- 8
Cover, for feed dr i vin g shaft gear case------------------- 1
Gasket------------------------------------------------ 1
Gasket------------------------------------------------ 1
Oil Distributin g Plate Retain ing Block-------------------- 1
Oil Distributing Plate----------------------------------- 1
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From the library of: Superior Sewing Machine & Supply LLC

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From the library of: Superior Sewing Machine & Supply LLC