UnionSpecial 63900 Series Instruction sheet

From the library of: Superior Sewing Machine & Supply LLC
FINE ST
ST YL ES
63 900A
63 900 B
63 90 OC
6390 OD
6390OAL
CATALOG
No.
126M
Second
Edition
Zwwm~
L E W I s® • C O L U M B I A®
CLASS 63900
STREAMLINED
HIGH SPEED NEEDLE FEED
LOCKSTITCH MACHINES
INDUSTRIAL
SEWING
MACHINES
UNION SPECIAL CORPORATION
CHICAGO
- - __j• • - .

From the library of: Superior Sewing Machine & Supply LLC
Catalog No. 126 M
INSTRUCTIONS
FOR
ADJUSTING AND OPERATING
LIST OF PARTS
CLASS 63900
Needle Feed
Streamlined Lockstitch
Styles
63900 A 63900 C
63900 B 63900 D
63900 AL
Second Edition
Copyright 1963 & 1970
by
Union Special Corporation
Rights Reserved in All Countries
UNION SPECIAL CORPORATION
INDUSTRIAL SEWING MACHINES
CHICAGO
Printed in U.S.A.
2
August, 1978

From the library of: Superior Sewing Machine & Supply LLC
FOREWORD
The predominant idea behind Union Special, is to build the best industrial mach-
ines in the world. The new high speed. streamlined Class 63900 lockstitchmachines
are a decided achievement along these lines. Parts are made to precision gauges.
insuring complete interchangeability.
A few of the outstanding features are:
1. QUICK INSTALLATION
The average installation time required will be about 10 minutes from packing
box to production sewing. if installation instructions are followed.
2. STREAMLINED DESIGN
Pleasing in appearance, this functional design provides greater stability and
ruggedness. freedom from difficult-to- clean recesses. New neutral taupe finish
is more restful to operator's eye.
3. SIMPLIFIED. OILING
Lubrication of these machines is automatic. Oil is supplied to all moving parts
for trouble free operation. A completely adjustable, double filtered hook oiling
system provided long hook life. A single, large capacity, accurately gauged
reservoir, sealed against lint and dust. reduces to a minimum oiling main-
tenance.
4. RAPID ACCELERATION
Precision methods in the manufacture of all parts, coupled with an advanced
oiling system. makes possible top operating speed almost instantaneous for
higher productive rates and lower costs.
5. PUSH BUTTON CONTROL
For quick, easy adjustment of the stitch length, a large, easy-to- read indicator
dial is marked in stitch lengths. plus a readily accessible nieans for adjusting
the needle feed.
It is the constant aim of Union Special to furnish concisely prepared information
which enables customers to procure all possible advantages from the use of UNION
SPECIAL machines. The following pages discuss valuable Adjusting and Operating
data.
Adjusting Instructions for Mechanics. covering Styles in this catalog. call
attention to many parts which must meet exacting conditional adjustments. Illustra-
tions are used to pinpoint areas under discussion.
Exploded views, together with explanations as to quantity, part number and
name, follow the Instructions, after which, is shown a collection of sewing part
combinations. with recommendations experience has prompted us to recommend
for a wide range of operations.
Union Special representatives. to be found in all leading manufacturing centers,
are anxious to cooperate in planning and make estimates tailored to your require-
ments.
UNION SPECIAL CORPORATION
Engineering Department
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
11
2
11
• Example: "Style
63900 A". SpecialStylenumbers contain the letter"Z". When only minor changes are made
in a standard machine, a
11
2
11
is suffixed to the Standard Style number. Example: "Style
63900 AZ".
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 63900
11
•
APPLICATION OF CATALOG
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 this class.
Reference 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.
STYLES OF MACHINES
High Speed Streamlined Long Arm Needle Feed Lockstitch Machines, One Needle, Light,
Medium and Heavy Duty, Drop Feed, Rotary Hook, Horizontal Hook Shaft, Push Button
Stitch Regulator, Slotted Segment - for Adjusting Needle Feed, Stitch Length Indicator, One
Reservoir Enclosed Automatic Lubricating System, Head Oil Siphon, Adjustable Hook Oil
Control, Needle Bearing Adjustable Feed Eccentric, Needle Bearings for Take-up Lever
and Needle Bar Driving Link, Feed Timing on Lower Main Shaft, Needle Feed Timing on
Upper Shaft, Maximum Work Space to Right of Needle Ba:r 11 1/8 Inches.
63900 A Equipped with disc tension for needle thread. For miscellaneous plain seaming
operations on light and medium weight work. 1 9/ 64 inch needle bar travel. Type
183 GXS or 183 GYS needles. Seam specification 30 l -SSa-1. Specify Style number,
stitches per inch, thread size, needle type and size. Maximum recommended speed
5500 R.P.M.
63900 B Equipped with disc tension for needle thread. For miscellaneous plain seaming
operations on medium and medium heavy weight work. 1 13/ 64 inch needle bar travel.
Type 180 GXS or 180 GYS needles. Seam specification 301-SSa-1. Specify Style number,
stitches per inch, thread size, needle type and size. Maximum recommended speed
5500 R.P.M.
63900 C Equipped with a rotary tension for needle thread. For miscellaneous plain seaming
operations on light and medium weight work. 1 9/64 inch needle bar travel. Type
183 GXS or 183 GYS needles. Seam specification 301- SSa- 1. Specify Style number,
stitches per inch, thread size, needle type and size. Maximum recommended speed
5500 R.P.M.
63900 D Equipped with a rotary tension for needle thread. For miscellaneous plain seaming
operations on medium and medium heavy weight work. 1 13/64 inch needle bar travel.
Type 180 GXS or 180 GYS needles. Seam specification 301-SSa-1. Specify Style number,
stitches per inch, thread size, needle type and size. Maximum recommended speed
5500 R.P.M.
63900 AL Same as Style 63900 C except fitted with a. 025 inch eccentric (. 050 inch throw)
feed driving shaft.
4

From the library of: Superior Sewing Machine & Supply LLC
NOTE: For the number necessary to complete the Styling of these 63900 machines, refer
to Pages 6 and 7. The number indicates a certain sewing combination - presser foot .
throat plate and feed dog. Specify the needle hole size if more than one is available
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 across the eye. Collectively, the type number and the size number
represent the complete symbol which is given on the label of all needles packaged and sold
by Union Special.
Needle Type 180 GXSor 180 GYS isrecommendedforStyles 63900 Band D, and needle
Type 183 GXS or 183 GYS is recommended for Styles 63900 A, C and AL. Their description
and sizes available are listed below.
Type No.
180 GXS
180 GYS
183 GXS
183 GYS
Description and Sizes
Round shank, round point, lockstitch, short length, ball eye, single groove ,
wide angle groove, struck groove, deep spot, ball point, chromium plated -
sizes 075/029, 080/032, 090/036, 100/040, 110/044, 125/049, 140/054 ,
150/060.
Round shank, round point, lockstitch , s hort length, ball eye, single groove ,
wide angle groove, struck groove, deep spot, chromium plated - sizes
075/029, 080/032, 090/036, 100/040, 110/044, 125/049, 140/054, 150/060 w
Round shank, round point, lockstitch, extra short length, ball eye, single
groove, wide angle groove, struck groove, deep spot, ball point, chromium
plated - s izes 065/025, 075/029, 080/032, 090/036, 100/040, 110/044.
Round shank, round point, lockstitch, extra short length, ball eye, single
groove, wide angle groove, struck groove, deep spot, chromium plated -
sizes 075/029, 080/032, 090/036 , 100/040, 110/044.
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 180 GXS, Size 080/032
11
•
Selection of proper needle size stiould be determined by the size of the thread used.
Thread should pass freely through the needle eye in order to produce a good stitch formation.
SELECTING THE SIZE OF THE NEEDLE
The strength requirement of the seam produced is largely dependent upon the size of
the thread employed. The quality of the work desired is largely dependent upon the size
of the needle employed.
The following table shows the preferred size of needle for a given size and kind of
thread. The choice, however, should give consideration to factors referred to above, which
may dictate the selection of a needle size slightly larger or smaller than the size specified.
Cotton Thread
Size
0
30
36
40
50
60
70
80
90
100
Mercerized Thread
Size
B
A
A
0
00
000
0000
0000
5
Needle
Size
150/060
140/054 to 150/060
125/049 to 140/054
110/044
to 125/049
110 / 044 to 12 5/ 04 9
100/040 to 110/044
090/036 to 100/040
080/032 to 090/036
080/032 to 090/036
075/029 to 080/032

From the library of: Superior Sewing Machine & Supply LLC
STYLE NUMBERS NECESSARY TO COMPLETE STYLING OF 63900 MACHINES
** Only Style numbers available for Style 63900 AL.
(AFTER EACH STYLE NUMBER IS LISTED THE PRESSER FOOT, THROAT PLATE AND FEED DOG MAKING
UP THE SPECIFIC STYLE. WHERE MORE THAN ONE PART NUMBER IS SHOWN FOR A SPECIFIC STYLE,
ONLY ONE WILL BE FURNISHED WITH EACH MACIIINE. IN ALL CASES, THE STYLE NUMBER WILL BE
LISTED AND THE PRESSER FOOT, FEED DOG AND THROAT PLATE MUST ALSO BE LISTED ON S. R.)
STYLE
STITCH
NUMBER PRESSER FOOT FEED DOG
THROAT PLATE
RANGE
** 1
61920 L 61926 D
*61928 B 12-16
** 2
61920 S 61926 D
*61928 B 12-16
** 2- A
L440 A
**
2- B
61920 M
** 3
61920 B
61926
*61928 11-18
**
3- A
61920 S
** 4
61927 A
61926 A
*61928 A 11-18
**
4-A
61320 P
** 4- B
61420 R
**
4-C
61920 B
5
61420 BT 61905 B- 063 or 073
61924 B
7-18
or 083
5- A
L440 A
6
61920 F 61905 F-063
61924 C
7-18
**
7 61920 J
61926
*61928
11-18
**
7-A
L471 A
**
7-B
61920 P
8
61920 B 61905 J-063
61924 J
7-18
9 61920 J 61905 J-063
61924 J 7-18
9-A
L471 A
10 61920 A 61905 C-073
61924 C 7-18
10-A
61920 S
11
61920 C
61905 C-073
61924 C
7- 18
12 61920 S 61905 K-073 or 083
61924 K
7-18
12-A
61920 A
12-B
61320 P
13
61920 J 61905 E-073
61924 E
7-18
14 61920 J 61905 G-073 or 083
61924 G
7- 18
15
61920 A
31905 B-063 or 073
61924 B 7-18
or 083
16 61920 R 61905 J-063
61924 J
7-18
**17
61920 N
61926 D
*61928 B 12-16
**18
61420 BT
61926
*61928
11-18
**18-A
61920 C
1<*19 L310 A
61926
*61928 11-18
20 61320 P 61905 E-073
61924 E 7- 18
20-A
61420 BT
20-B
L440 A
**21
61920 P 61926 C *
61928 B
12-16
**21-A
61920 S
**21-B 61920 L
i:*21-C
61420 BU
**22
61920 M
61926 C
61928 B
12-16
* Needle hole in throat plate (. 053 needle slot)
6

From the library of: Superior Sewing Machine & Supply LLC
STYLE
STITCH
NUMBER
PRESSER FOOT
FEED DOG THROAT PLATE
RANGE
23 61420 BU
61926 H #
61928 I-1 or II- 050 9-18
2:3 - A
61920 S
24
61420 61D05 K- 073 or 083
61924 I< 7- 18
25
61420 BT
6190
M- 063
61924 E 7- 18
26 61920 B 6190 C- 073
61924 C 7- 18
,;,, 27
61920 B 61926 C *
61928 B
12 - 16
28
61920 B 61905 E- 073
61924 E 7- 18
28 - A
61920 A
29
61420 BT
61905 J - 063 61924 J 7· 18
*'~ 30 61920 L 61926
•• 6192 8 11 -18
*'' 30 - A
61920 A
*~' 31
61420 AP 61926
* 6192 8
11 - 18
** 31- A 61920 M
•!<* 32 61920 R
61926
* 61928
11 - 18
,,,,33
61920 1\ 1
61926 E
"" 61928 C
12 - 16
,,,, 34
61920 B 61926 T *
61928
11- 18
** 35
61920 1\1
61926 F
'' 61928 C
12-16
·~~' 36
61420 BV
61926 C •'
61928 B
12- 16
** 36 - A
61420 BY
,,,:,37
61420 BT
61926 D *
61928 B 12 - 16
38 61920 L
61905 J - 063
61924 J 7-18
*••39
61920 D
61926 D *61928 B
12-16
40 63920 C 61926 R
•!< 619 28 R 7-20
** 76
L460 A 61926 A *6
1D 28 A 11 - 18
*~ ' 77
L427 A 61!)26 *61928
11- 18
78 61220 I<
61905 II-063 or 083
61 92 4 H
7-18
79
61920 T
61926 B 6192 8 M-073 6- 10
80 L391 A
61926 B #
63928 E 6-
10
81 61920 T 61926 B
61928 1\1-053 6- 10
82
L391 A
61926 B 61928 1\ 1- 053 6-10
** 83
L347 A
61926 A ••
61028 A
11-18
** 84
61920 U
L379 A t
L378 A 12 - 18
85
61220 K
L582 A t
L581 A 7·
18
86
61420 CM L582 A t
L581 A 7-
18
86 - A
61420 H
"'
*88
61920 G
61926 G 61928 G-060
10-25
·~•!<8 9
61920 K 61405 AC
61928 K-060
10 - 25
**9 0
61920 G
61926 G 61928 G- 050
7- 20
,,,,91
61920 K
6140 5 AC 61928 K- 050
7- 20
* N ee dl e hole in throat plate {. 053 needle slo t)
# Needle hole in throat plate(. 07 3 needle slot)
t Needle hole in throat plate (. 063 needl e slot)
NOTE: Style No. 88 is actu a lly 29480 CM, Style No.
89 is actually 29480 CN, Styl e No. 90 is act ually 29480 EN
and Styl e No. 91 is actually 29480 EP.
7

From the library of: Superior Sewing Machine & Supply LLC
IDENTIFYING PARTS
Where the construction permits, each part is stamped with its part number. Parts too
small for a complete catalog stamping are identified by letter symbols which distinguish one
part from another that is similar in appearance.
Part numbers represent the same part, regardless of catalog in which they appear.
IMPORTANT! ON ALL ORDERS, PLEASE INCLUDE PART NAME AND STYLE OF
MACHINE FOR WHICH PART IS ORDERED.
ORDERING OF REPAIR PARTS
ILLUSTRATIONS
The arrangement of this catalog is to facilitate easy and accurate ordering of Class 63900
replacement parts.
Seven exploded view plates cover the Standard Styles listed in this catalog. Each plate
presents a sector of the machine, parts being aligned as in their assembled position. Small
keyline views show by a blackened area exactly where the parts being discussed fit in the
assembled machine. On the page opposite the illustration will be found a listing of the parts
with their part numbers, descriptions and the number of pieces required in the particular
view being shown.
Numbers in the first column are reference numbers only, and merely indicate the position
of the part in the illustration. Reference numbers should never be used in ordering parts.
Always use the part number listed in the second column. Each exploded view plate carries
a reference number for each part available for sale.
Sub- assemblies, which are sold complete, or by separate part, are in a bracket or a
solid line box on the picture plate. Component parts of sub-assemblies, which can be furnished
for repairs, are indicated by indenting their descriptions under the description of the main
sub- assembly. Example:
20
21
22
23
24
29126 DD
61437 K
61438 B
88
660-225
Feed Driving Eccentric and Connecting Rod Assembly- - ---- 1
Feed Drive Eccentric(. 092 inch throw)--------------- 1
Feed Dr i ve Eccentric Connecting Rod- - - - - - - - - - - - - - - - - 1
Set Screw- - - - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - -- - - 1
Needle Bearing - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1
In those cases where a part is common to all of the machines covered by this catalog,
no specific usage will be mentioned in the description. However, when the parts for the
various machines are not the same, the specific usage will be mentioned in the description,
and, if necessary, the difference will be shown in the illustration.
At the back of the book will be found a numerical index of all the parts shown in this book .
This will facilitate locating the illustration and description when only the part number in known.
USE GENUINE NEEDLES AND REPAIR PARTS
Success in the operation of these machines can be secured only with genuine UNION SPECIAL
Needles and Repair Parts as furnished by the Union Special Corporation, its subsidiaries and
authorized distributors. They are designed according to the most approved scientific principles,
and are made with utmost precision. Maximum efficiency and durability are assured.
Genuine needles are packaged with labels marked ~. Genuine repair parts are
stamped with the Union Special trademark, U S Emblem. Each trademark 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 f. o. b. shipping point. Parcel Post shipments are insured unless otherwise directed.
A charge is made to cover the postage and insurance.
8

From the library of: Superior Sewing Machine & Supply LLC
CLASS 63900 (Page 1)
RECOMMENDED STYLE NUMBERS FOR SPECIFIC OPERATIONS
STYLE
PRESSER
FEED T HROAT
ARTICLE AND OPERATION
NUMBER FOOT DOG
PLATE REMARKS
BAGS, Plastic Clothing, Shoe and Damper
Binding
79 61920 T 61926 B
61928 M-073
80
L391 A 61926 B #
63928 E
Hemming 33
61920 M 61926 E
:,,'< 61928 C
BLOUSES
Runstitch collars
1
61920 L
61926 D * 61928 B
Piece front facings and attach facings
1
61920 L 61926 D *
61928 B
Hem right and left front facings
35
61920 M 61926 F
"' " 61928 C
Edgestitch right and left front facings
and collar
83
L347 A
61926 A * 61928 A
Attach collar 7
61920 J
61926 * 61928
COATS, Children's
Make liner, make darts, JOm
co
shoulders, set sleeves, close
sleeve and sides
21-B 61920 L
61926 C *
61928 B
Make collar and cuffs
21- B 61920 L
61926 C "" 61928 B
Seam, gore, join side seams, sew
darts and plaits and join shoulders
27
61920 B
61926 C *
61928 B
Attach lining to sleeves and front
facings
27
61920 B
61926 C
*61928 B
COATS, Ladies' Car
Make lining, join sleeves, shoulders
and side and back seams
1
61920 L
61926 D ""' 61928 B
37
61420 BT
61926 D "'" 61928 B
Sew knit wristlets and collar to lining
8
61920 B
61905 J-063
61924 J
Set pockets, make darts, sew knit
facing to pocket backs
8
61920 B
61905 J-063
61924 J
21-B 61920 L
61926 C *
61928 B
Set sleeves, close sleeves, attach
collar, sew lining to front facings
8
61920 B
61905 J-063
61924 J
38
61920 L
61905 J - 063
61924 J
Edgestitch front and collar
33
61920 M
61926 E
""' 61928 C
#
Needle hole in throat plate (. 073 inch needle slot)
*
Needle hole in throat plate (. 053 inch needle slot)

From the library of: Superior Sewing Machine & Supply LLC
CLASS 63900 (Page 2)
STYLE PRESSER FEED THROAT
ARTICLE AND OPERATION
NUMBER
FOOT
DOG
PLATE REMARKS
COATS, Boy's Sport
Make lining, gore sleeves, set
sleeves, close shoulders and side
seams
1 61920 L
61926 D
*61928 B
Make collar, gore sleeves,
join
shoulders and set pockets
21-B
61920 L
61926 C
*61928 B
27
61920 B 61926 C
*61928 B
Attach lining to front facings, seam
back, close sleeves and side seam
21-B
61920 L
61926 C *61928 B
Edgestitch front and collar
33 61920 M 61926 E
*61928 C
COATS, Sport and Suit
Seam sleeves, elbow seams, sleeve
linings, seam back, side seams,
front facings to lining, pocket
1--'
facings
3-A
61920 S 61926
*61928
0 1
61920 L 61926 D
*61928 B
Hem yoke lining
1 61920 L 61926 D
*61928 B
COATS, Men's Top and Overcoats
Make lining and back yoke
1 61920 L 61926 D *61928 B
Close and cord elbow seams and
underarm seams
21-A
61920 S 61926 C *61928 B
21-C
61420 BU 61926 C *61928 B
21-B
61920 L 61926 C
*61928 B
Sew lining and tape to vent 21-A
61920 S 61926 C
*61928 B
21-B
61920 L 61926 C
*61928 B
Close back seam, side seams and
cord stitch
21-A
61920 S 61926 C
*61928 B
21-B
61920 L 61926 C
*61928 B
Edgestitch front lapels and collar
36 61420 BV 61926 C
*61928 B
36-A
61420 BY 61926 C *61928 B
21-B
61920 L 61926 C
*61928 B
* Needle hole in throat plate (. 053 inch needle slot)

From the library of: Superior Sewing Machine & Supply LLC
CLASS 63900 (Page 3)
STYLE PRESSER
FEED THROAT
ARTICLE AND OPERATION
NUMBER
FOOT
DOG
PLATE
REMARKS
COATS, Town and Country
Make quilted lining, gore sleeves,
join shoulders, attach front
facings to lining
12 61920 S 61905 K-073 or 083 61924 K
12-A
61920 A 61905 K-073 or 083
61924 K
Quilt lining to undercollar 12
61920 S
61905 K-073 or 083 61924 K
12-A
61920 A 61905 K-073 or 083 61924 K
Runstitch collar
12 61920 S
61905 K-073 or 083 61924 K
12-A
61920 A 61905 K-073 or 083
61924 K
Runstitch pocket flaps
12
61920 S 61905 K-073 or 083 61924 K
12-A
61920 A 61905 K-073 or 083
61924 K
Sew facings to pockets
12
61920 S 61905 K-073 or 083 61924 K
12-A
61920 A
61905 K-073 or 083
61924 K
Attach welt to right and left fronts 12 61920 S 61905 K-073 or 083
61924 K
12-A
61920 A
61905 K-073 or 083 61924 K
Attach pockets and flaps 12 61920 S 61905 K-073 or 083
61924 K
.....
12-A
61920 A
61905 K-073 or 083 61924 K
.....
CORSETS
Topstitch bra cups 7-B
61920 P 61926 *61928
Attach lace and netting to bra cups
3
61920 B 61926 *61928
Join cups
3
61920 B
61926
*61928
Close stay pocket, join lining
3 61920 B 61926
*61928
Join stay panel to front panel
3
61920 B
61926
*61928
Join bodice to front
3
61920 B 61926
*61928
Join elastic to gore panel
3
61920 B 61926 *61928
Join back and yoke pieces
3
61920 B 61926 *61928
Join front, back and yoke to gore
panel
3
61920 B
61926
*61928
DRESSES, House
Attach front facings,
join shoulders 1 61920 L 61926 D
*61928 B
Set pockets
7
61920 J 61926 *61928
Sew on zipper and bottom facings 18 61420 BT 61926 *61928
Attach rick - rack to fronts 32 61920 R 61926 *61928
Attach facing to side
7
61920 J 61926 *61928
Finish collar facing 32 61920 R 61926 *61928
Sew in darts
32 61920 R 61926 *61928
*
Needle hole in throat plate (. 053 inch need le slot)

From the library of: Superior Sewing Machine & Supply LLC
CLASS 63900 (Page 4)
STYLE PRESSER
FEED THROAT
ARTICLE AND OPERATION
NUMBER
FOOT
DOO
PLATE REMARKS
DRESSES, Uniform
Close end of collar
32 61920 R
61926
*61928
Attach pockets
7 61920 J 61926
*61928
Attach right and left front facings
1 61920 L 61926 D
*61928 B
Sew collar down
7
61920 J
61926 * 61928
JACKETS
Runstitch collar,
cuffs and flaps 10 61920 A
61905 c- 073
61924 C
10-A
61920 S 61905 c- 073 61924 C
12-A
61920 A 61905 K-073 or 083
61924 K
12 61920 S 61905 K-073 or 083
61924 K
Attach collar and cuffs
10 61920 A
61905 C-073
61924 C
10-A
61920 S 61905 C-073
61924 C
12-A
61920 A 61905 K-073 or 083
61924 K
12
61920 S 61905 K-073 or 083
61924 K
Sew down collar and cuffs
13
61920 J
61905 E-073 61924 E
""""
14
61920 J
61905 G-073 or 083
61924 G
I.'-'
Gore sleeves, close sleeves, side
seam, set sleeves, shoulder joining
11 61920 C
61905 C-073 61924 C
12-A
61920 A
61905 K-073 or 083 61924 K
Set pockets
10
61920 A 61905 C-073 61924 C
Hem bottom
10-A
61920 S 61905 C-073
61924 C
11
61920 C 61905 C-073 61924 C
12-A
61920 A
61905 K-073 or 083
61924 K
Edge stitch fronts
10 61920 A
61905 C-073 61924 C
10-A
61920 S
61905 C-073 61924 C
12-A
61920 A
61905 K-073 or 083 61924 K
12-B
61320 P 61905 K-073 or 083 61924 K
Attach zippers
20 61320 P 61905 E-073 61924 E
20-A
61420 BT 61905 E-073
61924 E
20- B
L440 A 61905 E- 073 61924 E
JACKET LININGS, Rayon and Sateen
Shoulder joining, gore sleeves, piece
back panel, close sides and sleevP.s,
set sleeves
1 61920 L 61926 D *
61928 B
25
61420 BT
61905 M-063 61924 E
*
Needle hole in throat plate (. 053 inch needle slot)

From the library of: Superior Sewing Machine & Supply LLC
CLASS 63900 (Page 5)
STYLE PRESSER
FEED
THROAT
ARTICLE AND OPERATION
N UMBER FOOT
DOO
PLATE REMARKS
OUTERWEAR, Infant's
Make lining, seam sleeves,
sides and back
1
61920 L
61926 D
*61928 B
Make collar flaps and topstitch
27
61920 B
61926 C
*61928 B
Gore panels, topstitch panel,
side seam
21-B
61920 L
61926 C
*61928 B
Attach lining to front facings,
attach collar, attach lining to
bottom, close sleeves
21-B
61920 L
61926 C
*61928 B
Attach waistband and stitch
facings down
21-B
61920 L
61926 C
*61928 B
PAJAMAS, Ladies' Woven
Runstitch collar with piping
84 61920 U L379 A t
L378 A
Sew on front facings
1 61920 L 61926 D
*61928 B
Attach pockets
7
61920 J 61926
*61928
Attach waistband
7
61920 J 61926
*61928
7-A
L471 A 61926
*61928
I-'
Topstitch band
7 61920 J 61926
*61928
c.:,
PAJAMAS, Men's
Runstitch collar
1
61920 L 61926 D
*61928 B
3
61920 B 61926 *61928
Attach pockets
7 61920 J 61926 *61928
Attach collar
1
61920 L 61926 D
*61928 B
Stitch down collar
9
61920 J
61905 J-063 61924 J
7
61920 J
61926 *61928
Hem cuffs
78
61220 K 61905 H-063 or 083
61924 H
PANTS, Work
Front and hip pocket facings
21 - B
61920 L 61926 C *61928 B
7
61920 J 61926
*61928
Set and cord front pockets
21-B
61920 L
61926 C *61928 B
Hang front pockets 22 61920 M 61926 C *61928 B
21-B
61920 L 61926 C
*61928 B
23
61420 BU
61926 H
#61928 HorH-050
Set hip pockets
78
61220 K
61905 H-063 or 083
61924 H
86
61420 CM
L582 A t L581 A
86-A
61420 H L582 A t L581 A
#
Needle hole in throat plate (. 073 inch needle slot)
t
Needle hole in throat plate (. 063 inch needle slot)
*
Needle hole in throat plate (. 053 inch needle slot)

From the library of: Superior Sewing Machine & Supply LLC
CLASS 63900 (Page 6)
STYLE PRESSER
FEED
THROAT
ARTICLE AND OPERATION NUMBER FOOT DOG
PLATE
REMARKS
PANTS. Work ( Continued)
Attach waistband
23 61420 BU 61926 H
#61928 H
or H-050
23-A
61920 S 61926 H
#61928 H
or H-050
Topstitch left fly
1
61920 L
61926 D
*61928 B
23
61420 BU 61926 H
#61928 H
or H-050
23-A
61920 S 61926 H
#61928 H
or H-050
Topstitch waistband 24 61420 61905 K-073 or 083
61924 K
23
61420 BU 61926 H
#61928 H
or H-050
21-B
61920 L 61926 C
*61928 B
PANTS, Boy's Dress
Pocket facings, set front pockets
1
61920 L 61926 D
*61928 B
....
Topstitch left fly
34 61920 B 61926 T *61928
..i:,.
Attach waistband to fronts,
close seat seam
34
61920 B 61926 T
*61928
Topstitch waistband
21
61920 P 61926 C
*61928 B
21-B
61920 L 61926 C
*61928 B
PANTS, Dress and Slacks
(Including Wash and Wear)
Front and hip pocket facings
1 61920 L 61926 D *61928 B
7
61920 J
61926
*61928
Set and cord front pockets
2 61920 S 61926 D
*61928 B
1
61920 L 61926 D *61928 B
Attach right and left fly
1 61920 L 61926 D *61928 B
21-B
61920 L 61926 C *61928 B
17 61920 N 61926 D *61928 B
Attach waistband
2-A
L440 A 61926 D *61928 B
1
61920 L 61926 D
*61928 B
Side seam and inseam 2
61920 S 61926 D *61928 B
1
61920 L 61926 D *61928 B
Topstitch left fly
18
61420 BT 61926 *61928
*
Needle hole in throat plate (. 053 needle slot)
# Needle hole in throat plate (. 073 needle slot)

From the library of: Superior Sewing Machine & Supply LLC
CLASS 63900 (Page 7)
STYLE
PRESSER
FEED THROAT
ARTICLE AND OPERATION
NUMBER FOOT
DOG
PLATE
REMARKS
ROBES. Ladies'
Bind collar and cuffs,
front
panels and bottoms
81
61920 T 61926 B
61928 M-053
82
L391 A
61926 B 61928 M-053
Hem bottom
31
61420 AP
61926
*61928
31-A
61920 M
61926
*61928
Sew collar down
9
61920 J
61905 J-063
61924 J
9-A
L471 A 61905 J-063
61924 J
SHIRTS, Dress and Sport
1/ 4 inch margin
Runstitch collar
1
61920 L
61926 D
*61928 B
3
61920 B
61926
*61928 3/.16 inch margin
Topstitch collar
4 61927 A
61926 A
*61928 A 1/.16 inch margin
4-A
61320 P
61926 A
*61928 A 1
/. 8 inch margin
4-B
61420 R 61926 A
*61928 A 3
/. 32 inch margin
4-C
61920 B 61926 A
*61928 A 3/.16
inch margin
1
61920 L
61926 D
*61928 B 1 /. 4 inch margin
....
2-B
61920 M
61926 D
*61928 B 1/ 4
inch margin
c.n
Attach collar band
5
61420 BT
61905 B-063 or 073
61924 B
or 083
5-A
L440 A
61905 B-063 or 073
61924 B
or 083
2-B
61920 M
61926 D
*61928 B
Join shoulders (one operation)
6 61920 F 61905 F-063
61924 C
39
61920 D
61926 D
*61928 B Attachment req.
Topstitch collar band
7
61920 J
61926
*61928
7-B
61920 P
61926
*61928
Attach collar (first operation)
1
61920 L
61926 D
*61928 B
Stitch down collar (second operation)
7 61920 J
61926
*61928
7-B
61920 P
61926
*61928
Runstitch cuffs 2-B
61920 M
61926 D
*61928 B
1
61920 L
61926 D
*61928 B
3
61920 B
61926
*61928
Topstitch cuffs
4 61927 A
61926 A
*61928 A
1
61920 L 61926 D
*61928 B
Hem bottom
76 L460 A
61926 A
*61928 A 1/8 inch hem
Hem button front 2-B
61920 M
61926 D
*61928 B
*
Needle hole in throat plate (. 053 inch needle hole)

From the library of: Superior Sewing Machine & Supply LLC
CLASS 63900 (Page 8)
STYLE PRESSER FEED
THROAT
ARTICLE AND OPERATION NUMBER FOOT DOG
PLATE REMARKS
SHIRTS, Dress and Sport ( Continued)
Attach facing to left front
2-B
61920 M 61926 D *61928 B
Quilt collar band
1 61920 L
61926 D
*61928 B
Set pockets
7
61920 J 61926
*61928
Hem top of pockets
7 61920 J
61926
*61928
Attach sleeve facings (continuous) 85
SHIRTS, Knit Sport
61220 K
L582 A t
L581 A
Attach front facings 8 61920 B 61905 J-063
61924 J
Runstitch cuffs and collar 8
61920 B 61905 J-063 61924 J
Attach and stitch down collar and cuffs
9
61920 J
61905 J-063 61924 J
Set pockets
9
61920 J
61905 J-063 61924 J
SHIRTS, Work and Heavy Sport
1/ 4 inch margin
Runstitch and top stitch collar and cuffs 11 61920 C
61905 C-073 61924 C
10
61920 A 61905 C-073 61924 C 1/ 4 inch margin
12-A
61920 A
61905 K-073 or 083 61924 K 1/ 4 inch margin
Attach collar and cuffs
10
61920 A 61905 C-073 61924 C
....
12-A
61920 A 61905 K-073 or 083
61924 K
O')
Sew down collar and cuffs
13 61920 J
61905 E-073 61924 E
14 61920 J
61905 G-073 or 083 61924 G
Attach collar band
15
61920 A 61905 B-063 or 073 61924 B
or 083
Hem work shirts
19
L310 A
61926 *61928
77 L427 A 61926 *61928
SHORTS AND SLACKS, Ladies'
Attach facings to pockets
27
61920 B 61926 C *61928 B
Attach pockets
28-A
61920 A 61905 E-073 61924 E
Attach and close pockets
27
61920 B 61926 C *61928 B
Attach elastic to waistband and
finish band 26
61920 B
61905 C-073 61924 C
23
61420 BU 61926 H
#61928 H
or H-050
SHORTS, Men's Woven
Form right and left fly
7 61920 J 61926 *61928
7-B
61920 P 61926 *61928
*
Needle hole in throat plate (. 053 needle slot)
1
Needle hole in throat plate (. 063 needle slot)
Needle hole in throat plate (. 073 needle slot)

From the library of: Superior Sewing Machine & Supply LLC
CLASS 63900 (Page 9)
STYLE
PRESSER FEED
THROAT
ARTICLE AND OPERATION
NUMBER FOOT DOG
PLATE REMARKS
SHORTS. Men's Woven
(Continued)
French band hem 18
61420 BT 61926
*61928
2-B
61920 M 61926 D
*61928 B
Attach waistband 3
61920 B 61926
*61928
SHIRTS. Ladies' Cotton and Wool
Make bows. sew lining to back.
attach waistband and stitch down
band
1
61920 L
61926 D
*61928 B
SLIPS. Cotton and Woven Synthetic
Material
Topstitch right and rear side panels
7-B
61920 P 61926 *61928
SNOW SUITS, Children's Lined
Make liner, attach sleeves, seat
seam, side and center seam 1
61920 L 61926 D *61928 B
Attach hood, hood lining, cuffs and
....
anklets 12 61920 S 61905 K-073 or 083
61924 K
-:i
12-A
61920 A 61905 K-073 or 083
61924 K
Edgestitch fronts
33 61920 M
61926 E *61928 C
SWEATERS, Ladies' Cardigan
Attach button and buttonhole facings 16
61920 R
61905 J-063
61924 J
SWIM SUITS, Ladies' Woven
Make shoulder straps
18 61420 BT 61926 *61928
18 - A
61920 C
61926 *61928
Close back seam 30
61920 L 61926 *61928
30-A
61920 A 61926
*61928
SWIM SUITS, Ladies' Knit
Sewing bra lining to fronts
28
61920 B
61905 E-073 61924 E
28-A
61920 A
61905 E-073 61924 E
29
61420 BT
61905 J-063
61924 J
Seam bra lining 1
61920 L
61926 D * 61928 B
Make shoulder straps
18 61420 BT
61926
*61928
Join lining and trunks 1
61920 L
61926 D *61928 B
Close bra darts 1 61920 L 61926 D *61928 B
Close top of swim suit
1 61920 L 61926 D *61928 B
*
Needle hole in throat plate (. 053 needle slot)

From the library of: Superior Sewing Machine & Supply LLC
INSTALLING
CAUTION! When unpacking, DO NOT lift machine out of box by placing one
hand on handwheel. Using both hands on bed casting, lift gently.
Before leaving factory, each UNION SPECIAL machine is sewed off, inspected
and carefully packed. After the machine and accessories have been removed from
the packing box, the following steps should be followed:
PREPARATION OF MACHINE FOR INSTALLATION
A bag of assembly parts, consisting of one frame thread eyelet, one eyelet
attaching screw, one extra bobbin, two hinge studs, and two screws for holding
miscellaneous attachments to the bed plate, is packed with each machine.
Insert hinge studs in holes provided for them in rear of cloth plate. Assemble
the upper frame eyelet (A, Fig. 2 or 2A).
STANDARD ACCESSORIES
Included also with each machine is box of STANDARD ACCESSORIES- - containing
one bobbin winder assembly, the machine mounting frame, one oil drain jar and its
clamp spring, one knee lifter assembly and its rubber pad, bed positioning spring
and screw, four isolator pads and clips, and one machine rest pin. These parts are
essential when setting up the machine.
TABLE TOPS
Lockstitch machines are installed in table tops, prepared with cut- out, so that
the bed plate is FLUSH with the top of the machine mounting frame.
TABLE
BOARD
660-168
'-- 21393S
18
63474A
63476 B
Fig. 1

From the library of: Superior Sewing Machine & Supply LLC
E," B
Fig. 2
MACHINE MOUNTING FRAME INSTALLATION
On a suitable tableboard, place machine mounting frame (21393 N) in the machine
cut-out with the hinge lugs to the rear (Fig. 1). Insert the countersunk wood screw
through left hinge pad and tighten securely. Assemble bed positioning spring (63474 A)
over right hinge pad; insert round head wood screw and tighten securely. Assemble
the retaining plate (21393 R) to outside front of pan section, as shown; and snug up
nuts lightly.
Place sewing head in the frame mounting, and after being sure there is about
1/16 inch clearance between the cloth plate edge and the frame sides, rap the retain-
ing plate smartly upward with a hammer to insure a good grip on the underside of
the board and tighten locking nuts securely.
Tip machine back against rest pin, and assemble the knee press assembly as
shown. All end play of the cross shaft should be taken up by the cone bearings, but
must not bind.
19

From the library of: Superior Sewing Machine & Supply LLC
WRAP THREAD AROUND
ROT ARY DISK{J) TWO
COMPLETE TURNS ...
THEN THREAD TENSION
P OST EYELET {K).
INSTALLING ( Continued)
MACHINE MOUNTING FRAME INSTALLATION ( Continued)
C
-
Fig. 2A
Before the machine is put into production, the bell crank (21665 J) of the knee
lifter rod should be adjusted. The left stop screw (22597 F) should be set so that
the maximum lift of the presser bar and its parts do not interfere with moving parts
within the head. This may be done by setting the stop screw so that the presser bar
raises approximately 5/16 inch.
BOBBIN WINDER
The bobbin winder should be secured to the table top so that its pulley will be
located directly in front of the sewing machine belt and will bear against the belt
when in operation. The base of the winder has two elongated attaching holes, which
allow the mechanism to be moved closer to or farther away from the belt as needed.
The pulley of the winder, when in operation, should exert only enough pressure
against the belt to wind the bobbin. Regulation and operation of the bobbin winder is
described under "Winding the Bobbin", under OPERATOR'S INSTRUCTIONS.
BELTS
These machines are equipped to use either #1 "Vee" or round belts.
20