Welders

Our portable or trailer-mounted arc welders for rent range from 150 to 700 amp watt capacity, with 2-in-1 machines offering both welding and generator power. United Rentals’ welders inventory is great for a range of jobsites where electrical outlets aren't readily available.

Welders FAQs

What is the difference between arc and argon welding?

  • Argon is a type of gas used as a shielding agent to protect welders from extremely high temperatures. It is applied to the metals to prevent a reaction from the heated metal with the rest of the components in the air like nitrogen, oxygen and hydrogen. Argon gas also maintains the stability of the arc.

Is arc welding the same as stick welding?

  • Stick welding — also known as shielded metal arc welding (SMAW) — is one of the most common types of arc welding and uses a flux-coated electrode (the stick) to form the weld.

What's the best welder for beginners?

  • United Rentals offers a range of welders by top manufacturers. Our experts are here to help you find the exact piece of equipment for your preferred arc welding method and project need. 
welder rack 350
Cat Class Code
975-0965

Welder Rack, 350 Amp, 4 Pack

  • Housing for multiple power sources
  • Volts: 460/480-575V input
  • Fork slots & lifting eye
welder arc
Cat Class Code
975-0255

Arc Welder 150-amp TIG Inverter, 115/230 Volts

  • Stick and TIG
  • 115/230 dual voltage
  • Easy to carry, includes work clamp
  • Pulsing functions available
  • Uses: Arc welding for light- to medium-duty fabrication
  • Add this arc welder to your cart now
Cat Class Code
975-1200

Arc Welder 200-amp TIG Inverter, Portable DC

  • Stick and TIG
  • Volts: 230-580V AC input
  • Output: 200 amps at 18V, 40%
  • Digital meters available
  • Uses: Arc welding for light- to medium-duty fabrication
  • Add this arc welder to your cart now
Arc Welder
Cat Class Code
975-1520

Arc Welder AC to DC Rectifier, 750 amp

  • Converts AC to DC power for multiple welding applications
  • 750A/44V rated
  • Single or three-phase
  • Low amp operation available
  • Available for use of stick, MIG, TIG, FCAW and CAC-A welding
  • Add this arc welder AC to DC rectifier to your cart
Arc Welder Pack Shot
Cat Class Code
975-1271

Arc Welder DC to AC Inverter, 280 amp

  • Converts DC to AC power for multiple welding applications
  • 280 amp operation
  • Portable with handles
  • Low amp operation available
  • Uses: Ideal when versatility is needed for use of stick, MIG, TIG, FCAW and CAC-A welding
  • Add this arc welder DC to AC inverter to your cart
Arc Welder Pack Shot
Cat Class Code
975-1450

Arc Welder DC to AC Inverter, 450 amp

  • Converts DC to AC power for multiple welding applications
  • 450A/34V
  • Portable with handles
  • Low amp operation available
  • Uses: Ideal when versatility is needed for use of stick, MIG, TIG, FCAW and CAC-A welding
  • Add this arc welder DC to AC inverter to your cart
Arc Welder 300 Amp
Cat Class Code
975-1300

Arc Welder, 300 Amp

  • 300 amp operation
  • Smooth, more consistent arc that can be tailored to match application, material, fit-up, and welder technique
  • Produces stick, TIG, MIG and flux-cored outputs
  • Trailer-mounted for portability
  • Uses: Ideal for construction jobsites, or maintenance/repair applications that demand power where electrical outlets aren’t available
  • Add this arc welder to your cart
welder arc 300 amp pack shot
Cat Class Code
975-0250

Arc Welder, 300 amp Inverter

  • MIG, GMAW-P, Stick, TIG, FCAW and CAC-A
  • Input: single-phase or 3-phase
  • Output: 10-35V, 5-400A
  • Smooth, more consistent arc that can be tailored to match application, material, fit-up and welder technique
  • Uses: Ideal for worksites where multiple types of metal will need work and versatility is needed for use of stick, MIG, TIG, FCAW, and CAC-A welding
  • Add this arc welder to your cart now
Arc Welder Pack Shot
Cat Class Code
975-1400

Arc Welder, 400 amp

  • 400 amp operation
  • Smooth, more consistent arc that can be tailored to match application, material, fit-up and welder technique
  • Produces stick, TIG, MIG and flux-cored outputs
  • Trailer-mounted for portability
  • Uses: Ideal for construction jobsites, or maintenance/repair applications that demand power in where electrical outlets aren’t available
Miller Big Blue 500 Pro
Cat Class Code
975-1500

Arc Welder, 500 amp

  • 500 amp operation
  • Smooth, more consistent arc that can be tailored to match application, material, fit-up and welder technique
  • Produces stick, TIG, MIG and flux-cored outputs
  • Trailer-mounted for portability
  • Uses: Ideal for construction jobsites, or maintenance/repair applications that demand power in where electrical outlets aren’t available
  • Add this arc welder to your cart
Cat Class Code
975-1517

Arc Welder, 570 amp

  • MIG, TIG, Stick and FCAW
  • Variable arc control to match application, material, fit-up and welder technique
  • Supports 24/42/115 wire feeders
  • Portable
  • Uses: Ideal for worksites where multiple types of metal will need work and versatility is needed for use of stick, MIG, TIG, FCAW, and CAC-A welding
  • Add this arc welder to your cart now
Arc Welder 225-250 Amp
Cat Class Code
975-1240

Arc Welder, Diesel Powered, 225-250 amp

  • 225-250 amp operation
  • Smooth, more consistent arc that can be tailored to match application, material, fit-up and welder technique
  • Produces stick, TIG, MIG and flux-cored outputs
  • Trailer-mounted for portability
  • Uses: Ideal for construction jobsites, or maintenance/repair applications that demand power where electrical outlets aren’t available
  • Add this arc welder to your cart
welder
Cat Class Code
975-1360

Arc Welder, Gas or Diesel Powered, 350 amp

  • 350 amp operation, single or 3-phase
  • Smooth, more consistent arc that can be tailored to match application, material, fit-up and welder technique
  • MIG, TIG, Stick, FCAW and CAC-A available
  • Portable
  • Uses: Ideal for construction jobsites, or maintenance/repair applications where electric power is not available
  • Add this arc welder to your cart now
Portable Welder Pack Shot
Cat Class Code
975-1180

Arc Welder, Gas Powered, 180-189 amp

  • 180-189 amp operation
  • Smooth, more consistent arc that can be tailored to match application, material, fit-up, and welder technique
  • Produces stick, TIG, MIG and flux-cored outputs
  • Trailer-mounted for portability
  • Uses: Ideal for construction jobsites, or maintenance/repair applications that demand power where electrical outlets aren’t available
  • Add this arc welder to your cart
Arc Welder Pack Shot
Cat Class Code
975-1250

Arc Welder, Gas Powered, 250 amp

  • 250 amp operation
  • Smooth, more consistent arc that can be tailored to match application, material, fit-up and welder technique
  • Produces stick, TIG, MIG and flux-cored outputs
  • Trailer-mounted for portability
  • Uses: Ideal for construction jobsites, or maintenance/repair applications that demand power where electrical outlets aren’t available
  • Add this arc welder to your cart
Arc Welder
Cat Class Code
975-1255

Arc Welder, LP/Gas Powered, 250 amp

  • 250 amp operation
  • Produces stick, TIG, MIG and flux-cored outputs
  • Trailer-mounted for portability
  • Uses: Ideal for construction jobsites, or maintenance/repair applications that demand power where electrical outlets aren’t available
  • Add this arc welder to your cart
Arc Welder Pack Shot
Cat Class Code
975-1399

Dual Operator Arc Welder, 400 amp

  • 400 amp operation
  • Provides power to MIG, Stick, DC TIG, FCAW and CAC-A welding apparatus
  • Improves productivity by doubling the welding output of a single machine
  • Less equipment to transport and move around a site
  • Uses: For use when project requires two welding outputs in one machine
  • Add this dual operator arc welder to your cart
600 amp arc welder
Cat Class Code
975-1525

Dual Operator Arc Welder, 600 amp

  • 600 amp operation
  • Provides power to MIG, stick, DC TIG, FCAW and CAC-A welding apparatus
  • Improves productivity by doubling the welding output of a single machine
  • Less equipment to transport and move around a site
  • Uses: For use when project requires two welding outputs in one machine
  • Add this dual operator arc welder to your cart
Arc Welder 700 Amp
Cat Class Code
975-1530

Dual Operator Arc Welder, 700 amp

  • 700 amp operation
  • Provides power to MIG, stick, DC TIG, FCAW and CAC-A welding apparatus
  • Improves productivity by doubling the welding output of a single machine
  • Less equipment to transport and move around a site
  • Uses: For use when project requires two welding outputs in one machine
  • Add this dual operator arc welder to your cart
Mig Welder
Cat Class Code
975-5000

MIG and Flux-cored Arc Welding (FCAW) Unit, 120/240V, 20-25A

  • Portable multiprocess welder
  • Rated output (CC/DC) 120/240V, 20-25A
  • Single-phase
  • Lightweight; easily carried to any jobsite
  • Uses: Ideal for when MIG, stick and TIG welding versatility is needed on the jobsite
  • Add this MIG and flux-cored arc welding unit to your cart
welder mig suitcase pack shot
Cat Class Code
975-0243

MIG Welder Suitcase Kit, MPA

  • Include high-frequency arc starter and stabilizer
  • Enhances flexibility and performance
  • Expands capability of equipment
  • Portable unit
  • Uses: Ideal for MIG or gas metal arc welding (GMAW)
  • Add this MIG welder to your cart now
Arc Welder Pack Shot
Cat Class Code
975-1358

Multiprocess CC Arc Welder DC to AC Inverter, 350 amp

  • Converts DC to AC power for multiple welding applications
  • 348 amp
  • Portable with handles
  • Low amp operation available
  • Uses: Ideal for worksites using multiple types of metal and requires use of stick, MIG, TIG, FCAW, and CAC-A welding
  • Add this mulitprocess CC arc welder DC to AC rectifier to your cart
Arc Welder 350 Amp
Cat Class Code
975-1357

Multiprocess MPA Arc Welder DC to AC Inverter, 350 amp

  • Converts DC to AC power for multiple welding applications
  • 349 amp
  • Portable with handles
  • Low amp operation available
  • Uses: Ideal for worksites using multiple types of metal and requires use of stick, MIG, TIG, FCAW, and CAC-A welding
  • Add this mulitprocess MPA arc welder DC to AC rectifier to your cart
Arc Welder
Cat Class Code
975-1359

Multiprocess VS Arc Welder DC to AC Inverter, 350 amp

  • Converts DC to AC power for multiple welding applications
  • Portable with handles
  • Low amp operation available
  • Uses: Ideal for worksites using multiple types of metal and requires use of stick, MIG, TIG, FCAW, and CAC-A welding
  • Add this multiprocess VS arc welder DC to AC inverter to your cart
Wire Feed Mig Welder
Cat Class Code
975-3095

Portable MIG Welder, 140 amp, 120 volt with Wire Feed

  • Runs on standard 120 volt household current
  • Auto-set control automatically sets your welder to the proper parameter
  • Manual welding mode for welding aluminum or stainless steel or for flux-cored welding
  • Lightweight; easily carried to any jobsite
  • Uses: Ideal for light industrial welding applications, maintenance and repair
  • Add this portable MIG welder to your cart
Remote Reostat for Welding
Cat Class Code
975-5120

Remote Amperage Control Box, Gas/DSL Welder, 64 Ohm

  • Heat resistant aluminum case
  • For machines that use a reostat
  • Hand operated amperage controls
  • System consists of a transmitter and a receiver
  • Uses: Works on equipment with 5-pin remote control receptacle on a gas/dsl welder
  • Add this remote amperage control box to your cart
Remote Reostat
Cat Class Code
975-5115

Remote Amperage Control Electric Foot Pedal, 15 ohm

  • Innovative smart connector for TIG torch
  • 6' cord
  • Provides optimum amperage needed for any TIG welding project
  • Includes capacitors for noise reduction and arc improvement
  • Uses: Ideal for use with gas/dsl welder
  • Add this remote amperage control electric foot pedal to your cart
product image not available
Cat Class Code
975-0270

Stud Welder, 100 amp

  • 100 amps
  • Leads, whips and grounds not included
  • Durable steel body
  • United Rentals will contact you to confirm requirements
  • Uses: For stud arc welding light- to medium-duty welds including automotive, construction or industrial applications
  • Add this stud welder to your cart now
Big Blue 400 Pro arc welder on trailer
Cat Class Code
975-1350

Towable Arc Welder, 300 amp

  • 300 amp operation
  • Smooth, more consistent arc that can be tailored to match application, material, fit-up and welder technique
  • Produces stick, TIG, MIG, and flux-cored outputs
  • Trailer-mounted for towability
  • Uses: Ideal for construction jobsites, or maintenance/repair applications that demand power in where electrical outlets aren’t available
  • Add this towable arc welder to your cart
product image not available
Cat Class Code
975-1353

Towable Arc Welder, 325 amp

  • 325 amp operation
  • Smooth, more consistent arc that can be tailored to match application, material, fit-up and welder technique
  • Produces stick, TIG, MIG, and flux-cored outputs
  • Trailer-mounted for towability
  • Uses: Ideal for construction jobsites, or maintenance/repair applications that demand power in where electrical outlets aren’t available
  • Add this towable arc welder to your cart
Arc Welder Pack Shot
Cat Class Code
975-1405

Towable Arc Welder, 400 amp

  • 400 amp operation
  • Smooth, more consistent arc that can be tailored to match application, material, fit-up and welder technique
  • Produces stick, TIG, MIG and flux-cored outputs
  • Trailer-mounted for towability
  • Uses: Ideal for construction jobsites, or maintenance/repair applications that demand power in where electrical outlets aren’t available
  • Add this towable arc welder to your cart
product image not available
Cat Class Code
975-8050

Towable Welder, 500 amp, Diesel Powered

  • Diesel engine
  • 15-gallon fuel capacity
  • FCAW, Stick and CAC-A
  • 500-amp operation
  • Uses: For heavy-duty welding jobs where the flexibility to tow the engine to the site is needed
  • Add this diesel-powered welder to your cart
product image not available
Cat Class Code
975-0940

Welder, 350 amp, 4-pack Multi-operator

  • Designed for MIG, DC TIG, Stick, FCAW and gouging
  • Volts: 380/460/575V input
  • Lifting eyes, forklift slots or caster wheels available
  • 350 amps
  • Uses: Multiple operator welder rack to complete up to 4 welding jobs simultaneously
  • Add this welder rack to your cart now
product image not available
Cat Class Code
975-0966

Welder, 350 amp, 6-pack Multi-operator

  • Includes 6 welders stored securely in a durable rack
  • 350 amps
  • Lifting eyes, forklift slots or caster wheels available
  • Portable unit
  • Uses: Multiple operator welder rack to complete up to 6 welding jobs simultaneously
  • Add this welder rack to your cart now