Miller Electric SW3 User manual

Process
Resistance Spot Welding
Work Capacity 20 kVA units
weld total thicknesses up to 1/4 in
(6.3 mm). Not recommended for
aluminum or copper alloys.
Rated Output 20 kVA at 40% duty cycle
depending on model, based
on 10-second time period
Weight SSW 170– 185 lb (77 – 84 kg) Depending on model
Applications
Sheet Metal Work
Light Fabrication
Maintenance Work
Quick
Specs
SSW Series Spot Welders Water-Cooled Resistance
Spot Welders
Issued July 2008 • Index No. SW/3.1
The Power of Blue® .SSW foot switch permits user to use both hands
to position weldment between tongs. Can be held
longer if longer hold time is desired.
All spot welders operate on single-phase input
power, and require an air supply of 60 PSI
(414 kPa) minimum.
Miller Electric Mfg. Co.
An Illinois Tool Works Company
1635 West Spencer Street
Appleton, WI 54914 USA
Web Site
www.MillerWelds.com
International Headquarters
Phone: [phone]
USA FAX: [phone]
Canadian FAX: [phone]
International FAX: [phone]
SSW models are designed for stationary
use and come with an all-steel pedestal
which houses timers and controls.
SSW models come complete with:
Stationary welding head
Remote foot switch
Pedestal inclusive of controls
and timer
Air filter/regulator assembly
Order tongs/tips separately to
match your applications Air filter/regulator
assembly included.
Set-up/weld switch permits checking of
tong pressure and alignment without
making a weld.
Built-in squeeze/weld timer makes it quick
and easy to set or adjust squeeze and/or
weld time in hundredths of a second.
LED display makes it easy to read and
see timer settings.
Ten-step current control adjusts output current
with no change in duty cycle.
Cam-operated locking device simplifies
installation and adjustment of bottom tong.
Power switch/power “on” light/circuit breaker
protects control circuitry. Easy reset.
Adjustable tong pressure nuts to adjust tong
pressure for different thicknesses and applications.
Model
SSW-2020 ATT
Stationary
SSW-2040 ATT
Stationary
Work
Capacity*
1/4 in
(6.3 mm)
Input
50/60 Hz
230 VAC
90 Amps
460 VAC
45 Amps
Rated
Output**
20 kVA at
40% Duty
Cycle
Rated Output (Calibrated w/ standard-type tongs)
6 in (152 mm) 12 in (305 mm) 18 in (457 mm)
12,500 A 10,500 A 9000 A
Specifications (Subject to change without notice.)
Max. Open-
Circuit Voltage
3.55
Dimensions
H x W x D
49 x 11 x
21-3/4 in
(1245 x 280
x 552 mm)
Net
Weight
185 lb
(84 kg)
*Combined thickness uncoated mild steel using 6 in (152 mm) tongs.
**Duty Cycle based on 10-second time period. (40% duty cycle means unit can weld for 4 second out of each 10-second time period.)

2
Control Panel
1. Power “On” Light/Circuit Breaker/Switch
2. Fuse to Protect Control Transformer
3. Weld Amperage Control
4. LED Display
5. Set-Up/Weld Switch
Place rocker switch in Set-Up position to
check tong pressure and alignment without
making weld.
Place in Weld position when ready to
activate actual squeeze and weld time.
SPOT TIMER
4 3 2 1
ST WT
LED Display
Sets times from 9.99
to 0.01 seconds
ST Selector Button
Set squeeze time with buttons
(3), (2), (1). Set enough time
for tongs to close before weld
amperage starts.
WT Selector Button Set weld
time with buttons (3), (2), (1).
Second row of LEDs displays
squeeze time set or weld time set.
First row of LEDs displays
actual times.
1 4
5
2
3
Tip Dresser #040 228
For use with pointed tips.
Genuine Miller Accessories
Coolmate 3 Coolmate 4
Coolmate V3
Coolmate™3
#043 007 115 VAC
#043 008 230 VAC
For use with water-cooled torches rated up
to 600 amps. Unique paddle-wheel indicator,
external filter and easy-fill spout.
Coolmate™V3 #043 009 115 VAC
For use with water-cooled torches rated up
to 500 amps. Vertical design conveniently
mounts to Miller cylinder rack in place of
one cylinder.
Coolmate™4 #042 288
For use with water-cooled torches rated up
to 600 amps. Tough molded polyethylene
case with carrying handle.
Coolants
#043 810 Coolant, low-conductivity
#043 809 Coolant, aluminum protecting
Sold in cases of four 1-gallon recyclable
plastic bottles. Miller coolants contain a
base of ethylene glycol and deionized water
to protect against freezing to -37˚F (-38˚C) or
boiling to 227˚F (108˚C). Both also contain
a compound that resists algae growth.
Water Coolant Systems
For more information, see the Miller Coolant Systems literature sheet, Index No. AY/7.2.

3
Tongs and Tips (Must be ordered separately from spot welders. One pair of tips are supplied with each set of tongs.)
STANDARD 90°
No. 1 Morse Taper
No. 2 Morse Taper
#040 218
—
#040 219
—
#040 220
#041 001
6 in
(150 mm)
12 in
(304 mm)
18 in
(457 mm)
TONG LENGTH
TONGS
6-1/4 in
(159 mm)
4-1/4 in
(108 mm)
7-1/2 in
(190 mm)
9 in
(229 mm)
X
#040 223
#040 308
STANDARD 45°
No. 1 Morse Taper
No. 2 Morse Taper
—
—
#041 004
—
#041 005
#040 296
#040 851
#040 225
TT-6W
No. 2 Morse Taper
TT-9W
No. 2 Morse Taper
— — #041 838 #040 308
— — #041 840 #040 308
TIPS INCLUDED
4-1/4 in
(108 mm) 6-1/4 in (159 mm)
X
Notes for tongs and tips:
Tongs and tips shown to the
left can be used with all PSW
and SSW model spot welders.
Recommended max. tong
length is 18 in (457 mm).
Tong throat-height dimension
for standard 90° and 45° tongs
is 4-1/4 in (108 mm). Throat
length is measured from the
center of the spot tips to the
front water hose connection.
X = tong length.
One set of tips is supplied with
each set of tongs.
Tips are made of RWMA Class
2 alloy.
Maximum welding capabilities
are obtained with minimum
tong length.
MT = Morse Taper.
No. 1 Morse Taper has smaller
diameter than No. 2 Morse
Taper.
#040 227
#040 223
No. 1 MT (Pointed)
#040 224
No. 1 MT (Offset)
#040 851
No. 1 MT (Offset)
#040 226
No. 1 MT (Offset)
#040 298
No. 1 MT (Offset)
#040 308
No. 2 MT (Pointed)
#040 225
No. 2 MT (Offset)
#040 216
No. 1 MT (Flat Swivel Tip)
Matching Pointed Tip
Adapter (adapts No. 1 Morse Taper Tip
to No. 2 receptacle)
2 tips
2 tips
2 tips
2 adapters
2 tips
2 tips
2 tips
2 tips
2 tips
QUANTITY
TIPS
Standard No. 1 Tongs, 90°
Standard No. 1 Tongs, 90°
Standard No. 1 Tongs, 45°
Standard No. 2 Tongs, 45°
Standard No. 1 Tongs, 90°
Standard No. 1 Tongs, 90°
Standard No. 1 Tongs, 90°
Standard No. 2 Tongs, 90°
TT-6W Tongs
TT-9W Tongs
Standard No. 2 Tongs, 90°
TT-6W Tongs (top)
TT-9W Tongs (top)
WHERE USED

Litho in USA
Distributed by:
Equipment and Options Stock No. Description Qty. Price
SSW-2020 ATT #903 826 Stationary, air-operated, 230 VAC, 50/60 Hz
SSW-2040 ATT #903 827 Stationary, air-operated, 460 VAC, 50/60 Hz
Tongs
Order separately Ordered by the pair. One pair of tips included with each pair of tongs.
See page 3 for tong/tip combinations
Tips
Order spares or additional types One pair of tips included with each pair of tongs.
See page 3 for tips that can be ordered in pairs or individually
Accessories
Tip Dresser #040 228
Coolant Systems
Coolmate™3#043 007 115 VAC 5/8-18 left-hand inlet/outlet receptacles
#043 008 230 VAC 5/8-18 left-hand inlet/outlet receptacles
Coolmate™V3 #043 009 115 VAC 5/8-18 left-hand inlet/outlet receptacles
Coolmate™4#042 288 115 VAC 5/8-18 left-hand inlet/outlet receptacles
Coolant Solution
Low Conductivity #043 809 Case of four—1 gallon bottles
Aluminum Protecting #043 810 Case of four—1 gallon bottles
Miscellaneous
Coolant Hoses One coolant “out” and one coolant “in” hose required. One end 5/8-18
left-hand male fitting and the other end “slip-on” secured with hose clamp.
5/16 ID hoses must be compatible with coolant.
Air Hoses Air supply to air filter to back of controller.
Air Filter has 1/4 in pipe thread female fittings.
Controller has 5/8-18 left-hand thread female fittings.
Input Power Cord To be supplied by local source to meet local electrical codes and guidelines.
Date: Total Quoted Price:
Ordering Information
Normally 5/8-18 left-hand
threaded receptacles
Slip-on hoses
tighten with
hose clamps
Input power line
Foot switch
CoolmateTM V3
circulator
Air in
Coolant line
Coolant line
Air hose 60 –100 PSI
SSW
Pedestal
Air filter/regulator
assembly
Order tongs and tips separately.
Also required:
Input power cord of proper size per
NEC and local codes.
Coolant source and two coolant
hoses (5/16 ID). Hoses must be
compatible with coolant.
Note: Oxy-acetylene hoses are not
compatible with ethylene glycol.
Air hoses.
Stationary Resistance Spot
Welding Basic Equipment
Typical Installations