Processes
- MIG (GMAW)
- Flux-cored (FCAW)
- Pulsed MIG
Bernard industrial MIG guns
Bernard BTB Air-Cooled MIG Guns
BTB air-cooled guns are configurable Bernard industrial guns listed with Miller-compatible power sources and feeders.
Heavy industrial
Steel
current catalog
Wire Capacity
.023 - 1/8 in. (0.6 - 3.2 mm)
Cable Lengths
10, 15, 20, or 25 ft. depending on configuration
Compatible Machine Paths
Millermatic 355
Open support pageGun Models
| Model | Stock # | Cable | Output | Wire size | Consumables |
|---|---|---|---|---|---|
| BTB 300 A | Q3015AE9HMC1 | 15 ft. (4.6 m) | 300 A | .052 in. (1.4 mm) | AccuLock S |
| BTB 300 A | Q3015AE9EMC1 | 15 ft. (4.6 m) | 300 A | .045 in. (1.2 mm) | AccuLock S |
| BTB 400 A | Q4015AE9EMC1 | 15 ft. (4.6 m) | 400 A | .045 in. (1.2 mm) | AccuLock S |
| BTB 400 A | Q4015ME9EMC1 | 15 ft. (4.6 m) | 400 A | .045 in. (1.2 mm) | AccuLock S |
Consumables and Replacement Parts
| Item | Part # | Description | Category | Buy |
|---|---|---|---|---|
| Diffuser | DS-A1-C | Rear load liner, small, thread-on | Diffuser | -- |
| Diffuser | DS-A2-C | Rear load liner, small, slip-on | Diffuser | -- |
| Diffuser | D-A1-C | Rear load liner, large, thread-on | Diffuser | -- |
| Diffuser | D-A2-C | Rear load liner, large, slip-on | Diffuser | -- |
| Nozzle | NS-A1218B | 1/2 in. ID, 1/8 in. recess brass nozzle, small | Nozzle | -- |
| Nozzle | NS-A5818C | 5/8 in. ID, 1/8 in. recess copper nozzle, small | Nozzle | -- |
| Tip | T-A035CH | .035 in. AccuLock S contact tip | Contact tip | Buy link unavailable. |
| Tip | T-A045CH | .045 in. AccuLock S contact tip | Contact tip | Buy link unavailable. |
| Tip | T-A052CH | .052 in. AccuLock S contact tip | Contact tip | -- |
| Tip | T-A062CH | 1/16 in. AccuLock S contact tip | Contact tip | -- |
Related Support Paths
Millermatic 355
Catalog-listed all-in-one machine path.
Open support pageBernard Clean Air E
Fume extraction gun family.
Open support pageIdentify the installed Centerfire setup
Bernard's December 2024 CFC/1.4 sheet shows the small DS-1 setup with 4523R insulator and the large D-1 setup with 4423R insulator. Both list T and TT contact tips. Match the installed diffuser, insulator, nozzle and wire size before ordering; a BTB gun name alone does not establish the configuration.
T-035 and TT-035 are separate 0.035-inch contact tips. T-035AL is listed separately for aluminum. Do not substitute it based only on diameter. Centerfire HD uses the specified nozzle body and cone with D-1, 4423R and T-series tips; the body and cone are ordered separately.
Bernard OEM configuration sheet (pages 2–3). Other gun configurations and machine-to-gun fitment remain unconfirmed here.
T-035 seller status
View Arc Weld T-035 listing (10-pack) — sold out in the October 3, 2026 public check. This is an exact listing, not an available buying option. Recheck stock and installed fitment at the seller. No other seller route is verified by this section.
Source: Miller Electric 2026 Full-line Catalog (source-bf756b1d2b74, page 24). Amazon links are kept separate from compatibility data.