Miller Electric SSW-2020 ATT 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 April 2009 • 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.

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
Out put**

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. Open­Circuit 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 un coated 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.)

Miller Electric Mfg. Co.

An Illinois Tool Works Company
1635 West Spencer Street
Appleton, WI 54914 USA

Web Site

www.MillerWelds.com

Equipment Sales US and Canada

Phone: [phone]
FAX: [phone]
International Phone: [phone]
International FAX: [phone]

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.