LOTOS MIG140 140A MIG Welder with SPOOL GUN

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The LOTOS MIG140 features a 140 amp MIG welder that can weld at industrial quality and performance at a very affordable price. The most versatile and perfect welder for do-it-yourself home users as well as professional users. The LOTOS MIG140 is also spool gun capable for welding aluminum. It can be easily connected to your existing 110V wall outlet and quickly setup within 10 minutes or less. It handles industrial standard 4” or 8” wire spools and incorporates a thermal overload protection system to protect your welder.


Ø 140-amp MIG Welder with mask, etc.

Ø Operates on 110V, Single phase 60Hz

Ø Suitable for welding stainless steel, mild steel, aluminum (with a spool gun), and other metal materials


MIG140 User Manual
Output Power
Input Voltages
110-115 V, 1-PH, 60 Hz
Input Current
20A @115V
Duty cycle @ 40°C (104°F)
20% @90A (18 V)
Dimensions with handle
16” (408mm) L
9.6” (244mm) W
14.5” (367mm) H
Weight w/ 8'11’’ (2.7 m) torch
54lbs (24.5kg)
Gas Supply
Steel: clean, dry, oil-free 75% argon and 25% CO 2
Aluminum: clean, dry, oil-free argon
Recommended gas inlet flow rate / pressure
12 – 14L/min
Input power cable length
6’ 3 (1.9m)
Mild Steel
24 Gauge – 1/4"
Stainless Steel
24 Gauge – 1/4"
Aluminum (with a Spool Gun)
1/8” Plate or Thicker
1 Year Warranty Included
*Production cut thickness are the results of Lotos’ laboratory testing. Production speeds are approximately 80% of maximum.
* For optimum weld quality, welding speeds may vary based on different welding applications.

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