Skip to Main Content
Canadian
Canadian owned and operated

Q4015MS3ETC - Bernard BTB 400A MIG Gun, 15ft, Tweco Connection, .045 Wire

Packaging: 1 per each
$1,237.33/ea $871.27/1 per each only $871.27/eaSave 30%

Usually ships within 3-5 business days

OVERVIEW

The "Best of the Best" in MIG Welding Comfort

Take your welding performance to the next level with the Bernard BTB 400 Amp MIG Gun. Known as the "Best of the Best," the BTB series merges the most popular features from Bernard's legacy Q-Gun, S-Gun, and T-Gun lines into one superior tool. This model (Q4015MS3ETC) features the legendary curved Q-Gun handle, designed to fit naturally in your hand, reducing grip force and minimizing fatigue during long days under the hood.

With a massive 400 Amp rating, this air-cooled gun is built to handle high-heat applications without overheating. The 15-foot cable gives you the freedom to move around your booth or job site, while the industrial-grade cable jacket protects against sparks and heavy wear. It comes ready to plug and play with a Tweco-style back end, ensuring it fits many popular wire feeders directly. The gun is set up out of the box for running .045" wire, making it perfect for heavy structural work.

Maintenance is a breeze with Bernard's simplified consumable systems. The gun is designed for quick tip changes and reliable gas coverage, helping you keep your arc on and your downtime low. If you are looking for a MIG gun that works as hard as you do and doesn't kill your wrist by the end of the shift, the Bernard BTB 400A is the upgrade you need.

Why Choose the Bernard BTB?

  • Comfort: Ergonomic handle design reduces joint stress.
  • Durability: Armored cable connections and impact-resistant materials.
  • Performance: Consistent wire feeding and excellent electrical conductivity.
  • Compatibility: Tweco connection fits a vast array of welding machines.
Additional Information
Amperage:400
Length:15 ft
Wire Size:0.045"
Back End:Tweco
Brand:Bernard
Front End:Bernard
Torch Type:MIG Gun, Semi-Automatic
Cooling Method:Air Cooled
Handle Style:Curved, Q-Gun Style
Duty Cycle:100% (CO2), 60% (Mixed Gas)
Connection Type:Tweco
Cable Length:15 ft
Packaging Description:1 per each

INCLUDED

  • 1x Bernard BTB 400A MIG Gun (15ft)
  • 1x Installed Liner (.045)
  • 1x Contact Tip
  • 1x Nozzle
  • 1x Diffuser
  • 1x Tweco-Style Rear Connector

APPLICATIONS

  • Heavy Equipment Manufacturing
  • Structural Steel Fabrication
  • General Industrial Fabrication
  • Shipbuilding
  • Railcar Construction
  • Trailer Manufacturing

FAQ

The Bernard BTB 400 Amp gun is rated at 100% duty cycle when using CO2 gas, and typically 60% duty cycle when using mixed gases.

Yes, this gun comes pre-installed with a liner compatible with 0.045" wire.

This model features a Tweco-style rear connection (often referred to as a Tweco #4 or #5 style back end).

Yes, the Bernard BTB platform is modular, and necks can be rotated or replaced with different angles and lengths depending on your needs.

This gun typically uses Bernard Centerfire consumables, including Centerfire contact tips, nozzles, and gas diffusers.

This is an air-cooled MIG gun.

Not directly if the machine requires a Miller-style pin. This gun has a Tweco connection. You would need an adapter or a machine equipped with a Tweco receiver.

It is configured for 0.045 inch welding wire.