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Midland Tool

Miller Maxstar® STR 210 120-480 V Stick/TIG Welder

Item # 907682 Category Tag
  • Pro-Set™ eliminates the guesswork when setting weld parameters. Use Pro-Set when you want the speed, convenience and confidence of preset controls. Simply select the feature and adjust until Pro-Set appears on the display.
  • Sleep timer conserves electricity. This programmable feature will power down the machine if it sits idle for a specified time.
  • Auto-Line:  Allows for any input voltage hookup (120 – 480 V) with no manual linking, providing convenience in any job setting. Ideal solution for dirty or
    unreliable power.
  • Blue Lightning™ high-frequency (HF) arc starter for non-contact arc initiation. Provides more consistent arc starts and greater reliability compared to traditional HF arc starters.
  • Wind Tunnel Technology™ protects internal electrical components from airborne contaminates, extending the product life.
  • Fan-On-Demand™ power source cooling system operates only when needed, reducing noise, energy of contaminants pulled though the machine.



Maintenance and Repair


Stick (SMAW)

Weldable Metals

Stainless Steel

Out Connection


Input Power

Stick (SMAW): 208-480 V
120 V
TIG (GTAW): 208-480 V
120 V

Amperage Range

Stick (SMAW) at 120 V: 5-100 A
Stick (SMAW) at 208-480 V: 5-210 A
TIG (GTAW): 1-210 A

Rated Output

Stick (SMAW) at 120 V: 90 A at 23.6 V
60 % duty cycle
Stick (SMAW) at 208-480 V: 160 A at 26.4 V
60 % duty cycle
TIG (GTAW) at 120 V: 125 A at 15 V
60 % duty cycle
TIG (GTAW) at 208-480 V: 210 A at 18.4 V
60 % duty cycle

Input Phase

Stick (SMAW) at 120 V: 1 phase
Stick (SMAW) at 208-480 V: 1 and 3 phase
TIG (GTAW) at 120 V: 1 phase
TIG (GTAW) at 208-480 V: 1 and 3 phase

Input Hz

50 / 60 Hz

Current Type


Weld Output


Max Open Circuit Voltage

80 VDC


13.6" H x 8.6" W x 19.5" D


36 lbs