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Group of three different BTB semi-automatic air-cooled MIG guns being held with gloved hands BTB semi-automatic air-cooled MIG gun with C series handle Gloved hand holding a Bernard BTB semi-automatic air-cooled MIG gun with C series handle Coiled BTB semi-automatic MIG gun with C series handle BTB semi-automatic air-cooled MIG gun with B series handle Coiled BTB semi-automatic air-cooled MIG gun with B series handle BTB semi-automatic air-cooled MIG gun with T series handle BTB semi-automatic air-cooled MIG gun with O series handle

BTB Semi-Automatic Air-Cooled MIG Guns

Optimize for Productivity. Standardize for Simplicity.

Build your ultimate Bernard® BTB semi-automatic air-cooled MIG gun. Choose from a variety of necks, handles and trigger styles to optimize welder ergonomics and weld access ‒ plus, standardize with a single line of consumables to simplify maintenance and contain costs.

You can count on Bernard BTB semi-automatic air-cooled MIG guns to deliver industrial-grade performance and reliability in the most demanding and abusive environments.

Configure My Gun Reverse Lookup

Group of seven different handles that can be configured with a BTB semi-automatic air-cooled MIG gun

Multiple handle and trigger options

  • Choose between seven different curved and straight handle styles
  • Wide selection of handles and easy-to-change trigger options allow guns to be matched to user preference and welding application
Rotatable neck for BTB semi-automatic air-cooled MIG gun shown in several different positons to demonstrate rotatability

Fixed or rotatable necks

  • Wide variety of angle and length options
  • No tools required to adjust rotatable necks
AccuLock S consumables family including contact tip, nozzle, diffuser, liner and power pin

High-performance consumables

Cutaway of Hytrel polymer (industrial grade) cable showing Hytrel inner tube, trigger leads and copper

Durable unicable design

  • Choose Hytrel® polymer cable (industrial grade), or upgrade to steel monocoil cable for extra pinch/kink resistance
AccuLock S liner family

Liner options

Processes

  • MIG (GMAW) welding

Duty Cycle Rating

  • 200 amp model – 100%: 200 amp with CO2, 60%: 200 amp with mixed gases
  • 300 amp model – 100%: 300 amp with CO2, 60%: 300 amp with mixed gases
  • 400 amp model – 100%: 400 amp with CO2, 60%: 400 amp with mixed gases
  • 500 amp model – 100%: 500 amp with CO2, 60%: 500 amp with mixed gases
  • 600 amp model – 100%: 600 amp with CO2, 60%: 600 amp with mixed gases

Cable Length Options

  • 10, 15, 20 and 25 feet

Wire Size Ranges

  • 0.023″ (0.6 mm) to 1/8″ (3.2 mm)

Customize your BTB semi-automatic air-cooled MIG gun online

Build your ultimate MIG gun!

Configure the gun part number you need, or reverse lookup your existing gun part number – plus get access to additional resources and an expanded replacement parts list with diagram.

This new mobile-friendly online configurator, now including AccuLock™ S Consumable options, provides downloadable exploded view diagrams and other valuable takeaways that you can print, save for later, or share via email.

Check it out today!

Gun Part Number Conversion Tool
Click here to convert your legacy Q-Gun™, S-Gun™ and T-Gun™ MIG gun part number to a BTB MIG gun part number.

Configure a BTB semi-automatic air-cooled MIG gun online
Find the replacement parts list and other details for the BTB semi-automatic air-cooled MIG gun you already have

Part Numbers

Consumables Systems

AccuLock S consumables family including contact tip, nozzle, diffuser and liner
AccuLock™ S Consumables
Centerfire consumables family shown with contact tips, nozzle and diffuser
Centerfire™ Consumables
TOUGH LOCK consumables family shown with contact tips, retaining head and nozzle
TOUGH LOCK® Consumables

MIG Gun Liners

AccuLock S liner family
AccuLock™ S Liners
Family of three QUICK LOAD liners with liner retainers
QUICK LOAD® Liners
Family of color-coded Bernard conventional liners
Bernard® Conventional Liners
Set of two Tregaskiss conventional liners for MIG welding guns
Conventional Liners for Aluminum Wire

Consumables Systems

Part NumberDescription
T-A023CHfor 0.023″ (0.6 mm) wire; qty. 10
T-A030CH*^for 0.030″ (0.8 mm) wire; qty. 10
T-A035CH*^for 0.035″ (0.9 mm) wire; qty. 10
T-A039CH*^for 0.039″ (1.0 mm) wire; qty. 10
T-A045CH*^for 0.045″ (1.2 mm) wire; qty. 10
T-A052CH*^for 0.052″ (1.3 mm) wire; qty. 10
T-A062CH*for 1/16″ (1.6 mm) wire; qty. 10
T-A072CH*for 0.072″ (1.8 mm) wire; qty. 10
T-A078CH*for 5/64″ (2.0 mm) wire; qty. 10
T-A094CH*for 3/32″ (2.8 mm) wire; qty. 10
T-A109CHfor 7/64″ (2.8 mm) wire; qty. 10
T-A125CHfor 1/8″ (3.2 mm) wire; qty. 10
TT-A023CHTapered; for 0.023″ (0.6 mm) wire; qty. 10
TT-A030CHTapered; for 0.030″ (0.8 mm) wire; qty. 10
TT-A035CHTapered; for 0.035″ (0.9 mm) wire; qty. 10
TT-A039CHTapered; for 0.039″ (1.0 mm) wire; qty. 10
TT-A045CHTapered; for 0.045″ (1.2 mm) wire; qty. 10
TT-A052CHTapered; for 0.052″ (1.3 mm) wire; qty. 10
TT-A062CHTapered; for 1/16″ (1.6 mm) wire; qty. 10

*add “-100” to end of the above part numbers for quantities of 100.
^ add “-1000” to end of the above part numbers for quantities of 1000.

Part NumberDescription
D-A1Large diffuser, thread-on; qty. 10
D-A2Large diffuser, slip-on; qty. 10
DS-A1Small diffuser, thread-on; qty. 10
DS-A2Small diffuser, slip-on; qty. 10
Part NumberDescription
N-A3400CLarge nozzle, 3/4″ bore, flush, copper; qty. 10
N-A3418CLarge nozzle, 3/4″ bore, 1/8″ recess, copper; qty. 10
N-A3414CLarge nozzle, 3/4″ bore, 1/4″ recess, copper; qty. 10
N-A3418BLarge nozzle, 3/4″ bore, 1/8″ recess, brass; qty. 10
N-A3414BLarge nozzle, 3/4″ bore, 1/4″ recess, brass; qty. 10
N-A5800CLarge nozzle, 5/8″ bore, flush, copper; qty. 10
N-A5818CLarge nozzle, 5/8″ bore, 1/8″ recess, copper; qty. 10
N-A5814CLarge nozzle, 5/8″ bore, 1/4″ recess, copper; qty. 10
N-A5818BLarge nozzle, 5/8″ bore, 1/8″ recess, brass; qty. 10
N-A5814BLarge nozzle, 5/8″ bore, 1/4″ recess, brass; qty. 10
NT-A3800CLarge nozzle, 3/8″ bore, flush, copper; for tapered contact tips; qty. 10
NS-A5800CSmall nozzle, 5/8″ bore, flush, copper; qty. 10
NS-A5818CSmall nozzle, 5/8″ bore, 1/8″ recess, copper; qty. 10
NS-A5800BSmall nozzle, 5/8″ bore, flush, brass; qty. 10
NS-A5818BSmall nozzle, 5/8″ bore, 1/8″ recess, brass; qty. 10
NS-A1218CSmall nozzle, 1/2″ bore, 1/8″ recess, copper; qty. 10
NS-A1200BSmall nozzle, 1/2″ bore, flush, brass; qty. 10
NS-A1218BSmall nozzle, 1/2″ bore, 1/8″ recess, brass; qty. 10
NST-A3800BSmall nozzle, 3/8″ bore, flush, brass; for tapered contact tips; qty. 10
NST-A3818BSmall nozzle, 3/8″ bore, 1/8″ recess, brass; for tapered contact tips; qty. 10
NST-A38XTBSmall nozzle, 3/8″ bore, 1/8″ extension, brass; for tapered contact tips; qty. 10
NST-A1218BSmall nozzle, 1/2″ bore, 1/8″ recess, brass; for tapered contact tips; qty. 10
Part NumberLiner Color:Description
LA1A-10Yellowfor 0.023″-0.030″ (0.6-0.8 mm) wire, 10 ft (3.05 m)
LA1A-15Yellowfor 0.023″-0.030″ (0.6-0.8 mm) wire, 15 ft (4.57 m)
LA1A-20Yellowfor 0.023″-0.030″ (0.6-0.8 mm) wire, 20 ft (6.10 m)
LA1A-25Yellowfor 0.023″-0.030″ (0.6-0.8 mm) wire, 25 ft (7.62 m)
LA2A-10Greenfor 0.030″-0.035″ (0.8-0.9 mm) wire, 10 ft (3.05 m)
LA2A-15Greenfor 0.030″-0.035″ (0.8-0.9 mm) wire, 15 ft (4.57 m)
LA2A-20Greenfor 0.030″-0.035″ (0.8-0.9 mm) wire, 20 ft (6.10 m)
LA2A-25Greenfor 0.030″-0.035″ (0.8-0.9 mm) wire, 25 ft (7.62 m)
LAD3A-10Whitefor 0.035″-0.045″ (0.9-1.2 mm) wire, 10 ft (3.05 m)
LAD3A-15Whitefor 0.035″-0.045″ (0.9-1.2 mm) wire, 15 ft (4.57 m)
LAD3A-20Whitefor 0.035″-0.045″ (0.9-1.2 mm) wire, 20 ft (6.10 m)
LAD3A-25Whitefor 0.035″-0.045″ (0.9-1.2 mm) wire, 25 ft (7.62 m)
LAD4A-10Redfor 0.045″-1/16″ (1.2-1.6 mm) wire, 10 ft (3.05 m)
LAD4A-15Redfor 0.045″-1/16″ (1.2-1.6 mm) wire, 15 ft (4.57 m)
LAD4A-20Redfor 0.045″-1/16″ (1.2-1.6 mm) wire, 20 ft (6.10 m)
LAD4A-25Redfor 0.045″-1/16″ (1.2-1.6 mm) wire, 25 ft (7.62 m)
LA6A-10Bluefor 5/64″ (2.0 mm) wire, 10 ft (3.05 m)
LA6A-15Bluefor 5/64″ (2.0 mm) wire, 15 ft (4.57 m)
LA6A-20Bluefor 5/64″ (2.0 mm) wire, 20 ft (6.10 m)
LA6A-25Bluefor 5/64″ (2.0 mm) wire, 25 ft (7.62 m)
LA7A-10Greyfor 3/32″ (2.4 mm) wire, 10 ft (3.05 m)
LA7A-15Greyfor 3/32″ (2.4 mm) wire, 15 ft (4.57 m)
LA7A-20Greyfor 3/32″ (2.4 mm) wire, 20 ft (6.10 m)
LA7A-25Greyfor 3/32″ (2.4 mm) wire, 25 ft (7.62 m)
LA8A-10Blackfor 7/64″-1/8″ (2.8-3.2 mm) wire, 10 ft (3.05 m)
LA8A-15Blackfor 7/64″-1/8″ (2.8-3.2 mm) wire, 15 ft (4.57 m)
LA8A-20Blackfor 7/64″-1/8″ (2.8-3.2 mm) wire, 20 ft (6.10 m)
LA8A-25Blackfor 7/64″-1/8″ (2.8-3.2 mm) wire, 25 ft (7.62 m)
Part NumberDescription
T-023for 0.023″ (0.6 mm) wire
T-030for 0.030″ (0.8 mm) wire
T-035for 0.035″ (0.9 mm) wire*
T-039for 0.039″ (1.0 mm) wire
T-045for 0.045″ (1.2 mm) wire*
T-052for 0.052″ (1.4 mm) wire
T-062for 1/16″ (1.6 mm) wire*
T-078for 5/64″ (2.0 mm) wire
T-094for 3/32″ (2.4 mm) wire
*Part number also applicable for aluminum in corresponding size
Part NumberDescription
DS-1Small, brass
D-1Large, brass
Part NumberDescription
NS-1218B1/2″ bore, 1/8″ tip recess, brass
NS-5818C5/8″ bore, 1/8″ tip recess, brass
N-5818C5/8″ bore, 1/8″ tip recess, copper
N-5814C5/8″ bore, 1/4″ tip recess, copper
N-3414C3/4″ bore, 1/4″ tip recess, copper
Part NumberDescription
403-20-30Heavy duty; for 0.030″ (0.8 mm) wire
403-20-35Heavy duty; for 0.035″ (0.9 mm) wire*
403-20-1.0Heavy duty; for 0.039″ (1.0 mm) wire
403-20-45Heavy duty; for 0.045″ (1.2 mm) wire*
403-20-52Heavy duty; for 0.052″ (1.3 mm) wire
403-20-116Heavy duty; for 1/16″ (1.6 mm) wire*
403-20-564Heavy duty; for 5/64″ (2.0 mm) wire
403-20-332Heavy duty; for 3/32″ (2.4 mm) wire
403-20-364Heavy duty; for 3/64″ (1.2 mm) aluminum wire
403-14-23Standard duty; for 0.023″ (0.6 mm) wire
403-14-30Standard duty; for 0.030″ (0.8 mm) wire
403-14-35Standard duty; for 0.035″ (0.9 mm) wire*
403-14-45Standard duty; for 0.045″ (1.2 mm) wire*
*Part number also applicable for aluminum in corresponding size
Part NumberDescription
404-26Heavy duty; dual taper, brass
404-18Standard duty; brass
Part NumberDescription
401-6-62Heavy duty; 5/8″ bore, 1/8″ tip recess, copper
401-5-62Heavy duty; 5/8″ bore, 1/4″ tip recess, copper
401-5-75Heavy duty; 3/4″ bore, 1/4″ tip recess, copper
401-4-62Standard duty; 5/8″ bore, 1/8″ tip recess, copper
Part NumberDescription
T1035for 0.035″ (0.9 mm) wire*
T1045for 0.045″ (1.2 mm) wire
T1052for 0.052″ (1.4 mm) wire
T1116for 1/16″ (1.6 mm) wire*
T1364for 3/64″ (1.2 mm) aluminum wire
*Part number also applicable for aluminum in corresponding size
Part NumberDescription
D118Q1/8″ recess
D114QHeavy duty; 1/4″ recess
Part NumberDescription
N1C58Q5/8″ bore, plated copper
N1C34HQHeavy duty; 3/4″ bore, plated copper

MIG Gun Liners

Important: AccuLock S liners are a critical component of the complete AccuLock S consumables system, and can only be used with AccuLock contact tips, diffusers, nozzles, neck insulators, power pins and power pin caps specific to the system.

>> See AccuLock S liner part numbers

Part NumberDescription
415-23-15Qfor 0.023″ (0.6 mm) wire; 15′ length
415-23-25Qfor 0.023″ (0.6 mm) wire; 25′ length
415-30-15Qfor 0.030″ (0.8 mm) wire; 15′ length
415-30-25Qfor 0.030″ (0.8 mm) wire; 25′ length
415-35-10Qfor 0.035″ (0.9 mm) – 0.045″ (1.2 mm) wire; 10′ length
415-35-15Qfor 0.035″ (0.9 mm) – 0.045″ (1.2 mm) wire; 15′ length
415-35-25Qfor 0.035″ (0.9 mm) – 0.045″ (1.2 mm) wire; 25′ length
415-116-10Qfor 0.052″ (1.3 mm) – 1/16″ (1.6 mm) wire; 10′ length
415-116-15Qfor 0.052″ (1.3 mm) – 1/16″ (1.6 mm) wire; 15′ length
415-116-25Qfor 0.052″ (1.3 mm) – 1/16″ (1.6 mm) wire; 25′ length
415-564-15Qfor 5/64″ (2.0 mm) wire; 15′ length
415-564-25Qfor 5/64″ (2.0 mm) wire; 25′ length
415-332-15Qfor 3/32″ (2.4 mm) wire; 15′ length
415-332-25Qfor 3/32″ (2.4 mm) wire; 25′ length

QUICK LOAD Liner Retainers

Required for initial installation only (sold separately)

Part NumberDescription
415-26for 0.035″ – 5/64″ wire
415-24for 0.078″ – 3/32″ wire
Part NumberDescription
L1A-15for 0.023″ (0.6 mm) – 0.030″ (0.8 mm) wire; 15′ length
L1A-25for 0.023″ (0.6 mm) – 0.030″ (0.8 mm) wire; 25′ length
L2A-15for 0.030″ (0.8 mm) – 0.035″ (0.9 mm) wire; 15′ length
L2A-25for 0.030″ (0.8 mm) – 0.035″ (0.9 mm) wire; 25′ length
L3A-10for 0.035″ (0.9 mm) – 0.045″ (1.2 mm) wire; 10′ length
L3A-15for 0.035″ (0.9 mm) – 0.045″ (1.2 mm) wire; 15′ length*
L3A-25for 0.035″ (0.9 mm) – 0.045″ (1.2 mm) wire; 25′ length*
L4A-10for 0.045″ (1.2 mm) – 1/16″ (1.6 mm) wire; 10′ length
L4A-15for 0.045″ (1.2 mm) – 1/16″ (1.6 mm) wire; 15′ length**
L4A-25for 0.045″ (1.2 mm) – 1/16″ (1.6 mm) wire; 25′ length**
L6A-15for 5/64″ (2.0 mm) wire; 15′ length
L6A-25for 5/64″ (2.0 mm) wire; 25′ length
L7A-15for 3/32″ (2.4 mm) wire; 15′ length
L7A-25for 3/32″ (2.4 mm) wire; 25′ length
L8A-15for 7/64″ (2.8 mm) – 1/8″ (3.2 mm) wire; 15′ length
L8A-25for 7/64″ (2.8 mm) – 1/8″ (3.2 mm) wire; 25′ length
*Standard liner for 0.035″ and 0.045″ guns
**Standard liner for 1/16″ guns

Part NumberDescription
415-35-2for 0.035″ (0.9 mm) – 0.045″ (1.2 mm) wire, steel wrapped nylon; 15′ length
415-45-02for 0.035″ (0.9 mm) – 3/64″ (1.2 mm) wire, polymer liner; 10′ length
415-45-03for 0.035″ (0.9 mm) – 3/64″ (1.2 mm) wire, polymer liner; 15′ length
415-45-04for 0.035″ (0.9 mm) – 0.045″ (1.2 mm) wire, steel wrapped nylon; 25′ length
415-116-2for 0.045″ (1.2 mm) – 1/16″ (1.6 mm) wire, steel wrapped nylon; 15′ length
415-116-22for 3/64″ (1.2 mm) – 1/16″ (1.6 mm) wire, polymer liner; 10′ length
415-116-23for 3/64″ (1.2 mm) – 1/16″ (1.6 mm) wire, polymer liner; 15′ length

In addition to the options and features included in our configurator, customers can choose from a variety of gun options and accessories that can help to further customize their gun to their personal preferences and the job at hand:

  • Q-neck coupler and grip
  • Flex necks
  • Jump liners
  • Heat shield
  • Neck guard
  • Specialty nozzles
  • Gun hanger
  • Repair kits














































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Copyright 2024 Tregaskiss | All Rights Reserved

As manufacturers of semi-automatic, fixed automatic and robotic MIG guns and consumables, Tregaskiss and Bernard have earned a reputation as an experienced, dependable partner to its customers in the automotive, construction and fabrication, heavy equipment, ship, rail, general manufacturing, commercial truck and trailer, and oil and gas industries. Tregaskiss and Bernard offer air-cooled semi-automatic, fixed automatic and robotic MIG guns, water-cooled semi-automatic, fixed automatic and robotic MIG guns, reamers, nozzle cleaning stations, anti-spatter liquid, wire cutters, anti-spatter sprayers, clutches, welding consumables, nozzles, MIG welding tips, and MIG welding torches.