(Re)Introducing the Bernard® S-Gun™ Semi-Automatic Air-Cooled MIG Gun
The Bernard® S-Gun™ is back—with refreshed configurations and enhanced flexibility—making it better suited than ever for demanding, hard-to-feed welding applications. While our steel monocoil cable isn’t new, its thoughtful updates make a noticeable difference in performance and reliability.
Why Choose the S-Gun? It Starts with the Cable
The S-Gun sets itself apart with a steel monocoil cable delivers superior structural integrity. This design offers excellent pinch resistance, helping maintain consistent gas flow and reliable wire feedability—even in tough conditions.
This makes the S-Gun ideal for applications that require longer cable lengths frequently looped or routed around tight corners. The result? Fewer pinch-related issues and a smoother welding experience.
Easy Configuration with Our Online Tool
Building an S-Gun to fit your needs is simple:
- Start with your amperage and cable length
- Select your preferred handle, neck, consumables, and power pin
- Generate a customized parts list—delivered right to your or your customer’s inbox
Visit our online configurator. In just a few clicks, you’ll have a tailored MIG gun solution that’s ready for your job. It’s fast, convenient, and eliminates the guesswork.
What’s New in the S-Gun Lineup?
To ensure we continue offering the best tools for the job, we’ve updated the S-Gun lineup with additional configurations and more options:
Model Options
- S250 (NEW)
- S350
- S450
Available in 15 ft., 20 ft., or 25 ft. cable lengths
Handle Choices
- Straight T-Series: Standard or locking trigger
- Curved Compact O-Series: Standard trigger only
Consumables
- AccuLock™ S system
- Choose Front Load or Rear Load liner styles
Power Pin Compatibility
- Miller®
- Tweco® #4 (with Lincoln® lead)
- Lincoln®
- Euro-style
These changes allow for more tailored configurations to meet specific application needs while streamlining ordering and setup.
Questions? We’re Here to Help
If you have any questions about the S-Gun or would like help configuring the right setup, our Customer Service team is ready to assist.
- Call us at 855-MIGWELD (644-9353)
- Or email cs@itwmig.com
DISCONTINUED PRODUCT | Clean Air™ Fume Extraction MIG Guns — 300 Amp, 400 Amp Models
DISCONTINUED PRODUCT | Clean Air™ Fume Extraction MIG Guns — 300 Amp, 400 Amp Models
Following the successful launch of Bernard’s Clean Air E™ fume extraction MIG gun on March 20, 2025, Bernard will discontinue its Clean Air fume extraction MIG guns in 300-amp and 400-amp configurations, effective September 30, 2025.
Examples of impacted configurations include:
CL30XXXXXXXX
CL40XXXXXXXX
Customers using these models are encouraged to transition to the next-generation Clean Air E fume extraction MIG gun. Clean Air E is an upgrade in performance. Designed for enhanced comfort, durability, and reduced welder fatigue, Clean Air E delivers efficient extraction with up to 95% fume capture with improved weld visibility while still enduring in the toughest welding environments.
If you have any questions, please contact Customer Service by phone 855.MIGWLED (644.9353) or by email cs@itwmig.com.
DISCONTINUED PRODUCT | Quik Tip™ Flush Diffuser, D1FQ
DISCONTINUED PRODUCT | Quik Tip™ Flush Diffuser, D1FQ
Effective August 22, 2025, Bernard will discontinue Quik Tip flush diffuser, D1FQ. There is no direct replacement; however, you can choose to install Quik Tip diffuser D118Q (1/8” recess) or convert to AccuLock S with a flush nozzle.
To convert from Quik Tip to AccuLock S, the following consumables are needed:
If you have any questions, please contact Customer Service by phone 855.MIGWLED (644.9353) or by email cs@itwmig.com.
DISCONTINUED PRODUCT | 1780086, Semi-Automatic Air-Cooled Handle Kit
DISCONTINUED PRODUCT | 1780086, Semi-Automatic Air-Cooled Handle Kit
Effective August 22, 2025, Bernard will discontinue handle kit 1780086. Handle kit 1880198 can be ordered as a direct replacement, which includes handle halves, screws and posts. This handle also requires a spring strain relief, part number 2520042, to be installed at the base of the handle, enclosed between the handle halves.
Handle kit 1780086 was originally used as the large B Series handle (yellow trigger) for our 400amp semi-automatic air-cooled MIG gun but has not been the factory installed handle since 2014. This handle style does not accept a spring strain relief. Rather, the inner halves contained a molded “rib”, shown below, to close around the cable jacket and prevent debris from entering the handle through the bottom. The spring strain relief required for replacement handle kit 1880198 serves this function.
PRODUCT UPDATE | New Power Pin Option for IronPro™ Series FCAW Guns
PRODUCT UPDATE | New Power Pin Option for IronPro™ Series FCAW Guns
We have expanded the power pin options available for our IronPro™ Series FCAW Guns. Power pin 2200363 (pictured below) is specifically designed for use in self-shielded flux-cored applications on a wide range of Lincoln® LN-25® feeder models.
You may order the following IronPro 350 FCAW Guns with this power pin:
| 10 ft. | 15 ft. |
|---|---|
| GL3510MLNZ | GL3515MLNZ |
| GL3510MSXZ | GL3515MSXZ |
If you have any questions, please call or email our Customer Service team at 855.644.9353 (MIGWELD) or cs@itwmig.com.
PRODUCT UPDATE: S-Gun™ Simplification – Discontinued Configuration Selections
PRODUCT UPDATE: S-Gun™ Simplification – Discontinued Configuration Selections
Continuing the simplification efforts for our S-Gun™ Semi-Automatic Air-Cooled MIG Guns, effective June 27, 2025, all S-Guns in 500 amp, 600amp or 10’ configurations in any amperage will be discontinued.
Examples of configurations that will be discontinued:
- S50XXXXXXXX
- S60XXXXXXXX
- SXX10XXXXXX
For 500 amp or 600 amp S-Guns that are no longer available, we suggest ordering a similar configuration from our BTB Semi-Automatic Air-Cooled MIG Guns.
- S50XXXXXXXX, suggested replacement will be Q50XXXXXXXX
- S60XXXXXXXX, suggested replacement will be Q60XXXXXXXX
For 10’ S-Gun MIG Guns, a similar S-Gun configuration can be ordered in a 15’ length. Or, a BTB configuration in 10’ in the same amperage.
- SXX10XXXXXX, suggested replacement will be SXX15XXXXXX
- SXX10XXXXXX, suggested replacement will be QXX10XXXXXX
If you have any questions, please contact Customer Service by phone 855.MIGWLED (644.9353) or by email cs@itwmig.com.
DISCONTINUED PRODUCT | Elliptical Diffusers
DISCONTINUED PRODUCT | Elliptical Conversion Diffusers
Effective June 20th, 2025, the following Elliptical series diffusers will be discontinued from our product offering:
| Part Number |
|---|
| 4235T |
| 4335T |
| 4435T |
| 4635T |
| 4635T-116 |
These diffusers allowed Elliptical series consumables to be compatible with Tweco® and Tregaskiss® style MIG guns. While there are no direct replacements for these parts, we suggest converting to AccuLock™ S consumables. For Tweco® style MIG guns, AccuLock™ S consumables can be installed by using adaptor 1380030. No adaptor is needed for Tregaskiss® MIG guns.
For an easy change-over, we offer AccuLock™ S conversion kits complete with a variety of tips, nozzles, diffusers and Tweco® adaptor. Kit Part Number: ALCSK-1
If you have any questions, please contact Customer Service by phone 855.MIGWLED (644.9353) or by email cs@itwmig.com.
PRODUCT UPDATE — Configurator Simplification, BTB Semi-Automatic MIG Gun
PRODUCT UPDATE – Configurator Simplification,
BTB Semi-Automatic MIG Gun
Effective April 22, 2025, we have simplified our BTB MIG Gun configurator selections. Check out your Best of The Best MIG Gun options below:
- Cable: Available in 200, 300, 400, 500 or 600 amps from 10, 15, 20 to 25 ft (no changes)
- Handles: Chose from B Series (small, large), O Series (small), or T Series (small, large)
- Consumables: Configurable with AccuLock™ S for Front Load or Rear Load liners, or Centerfire™ with Rear Load liners
- Power Pin: Available options include Miller®, Lincoln®, Euro Or Tweco® #4
BTB MIG Gun configurations that include options not listed above will still remain available for purchase. Our Reverse Lookup tool can help provide a parts breakdown for ordering information.
If you have any questions or would like more information, please contact Customer Service by phone at 1.855.MIGWELD (644.9353) or email at cs@itwmig.com.
PACKAGING UPDATE — New Bernard® BTB and TGX™ MIG Gun Boxes
PACKAGING UPDATE — New Bernard® BTB and TGX™ MIG Gun Boxes
Our Bernard® BTB and TGX™ MIG Gun boxes are undergoing a packaging change with a fresh new look. While the exterior is changing, the MIG guns inside remain the same — delivering the trusted performance and reliability you depend on. Please be advised you may notice both old and new packaging during the rollout as this change will happen gradually.
Discontinued Liners: L3B-10, L4B-10
Discontinued Liners: L3B-10, L4B-10
Effective February 19, 2025, Rear Load liners L3B-10 and L4B-10 are discontinued. Rear Load liners L3B-15 and L4B-15 directly replace L3B-10 and L4B-10, respectively. These replacements are 15ft (4.57 m) in length.
For questions, please contact Customer Service by phone at 1.855.MIGWELD (644.9353) or email at cs@itwmig.com.
NEW PRODUCT — Expanded AccuLock™ S and Tregaskiss® Nozzle Offering
NEW PRODUCT — Expanded AccuLock™ S and Tregaskiss® Nozzle Offering
We have expanded the nozzle options available in our AccuLock™ S and Tregaskiss® product families.
For AccuLock™ S, we have added the following nozzle options:
| Part Number | Bore Size | Tip Position | Material | Quantity | Compatibility |
|---|---|---|---|---|---|
| N-A1218C | 1/2″ | 1/8’’ recess | Copper | 10 | AccuLock™ S – Large |
| N-A1214C | 1/2″ | 1/4’’ recess | Copper | 10 | AccuLock™ S – Large |
| N-A3412C* | 3/4″ | 1/2’’ | Copper | 10 | AccuLock™ S – Large |
* For use with Miller Electric HD (High-Deposition) MIG CV GMAW process.
For Tregaskiss®, we have added the following nozzle option:
| Part Number | Bore Size | Tip Position | Material | Quantity | Compatibility |
|---|---|---|---|---|---|
| 401-9-75* | 3/4″ | 1/2″ | Copper | 10 | TOUGH LOCK® Diffuser 404-32 (Robotic) 404-26 (Semi-Automatic) AccuLock™ R Diffuser D-ATSH (Slip-On) |
* For use with Miller Electric HD (High-Deposition) MIG CV GMAW process.
If you have any questions, please call or email our Customer Service team at 855.MIGWELD (644.9353) or cs@itwmig.com.
Update to Liner Descriptions
Update to Liner Descriptions
As part of our on-going simplification efforts, we are renaming our current selection of MIG gun liners. This change is effective now, as you will see our literature and website content being updated to reflect the simplified naming structure.
We offer four different liner types between our semi-automatic and automation MIG guns. The chart below will show the previous liner name/reference as well as the updated liner name/reference.
It’s important to note that the liners themselves are not changing. We will continue to deliver the same premium quality liners, using the same part numbers as we currently do.
| Previous Liner Name/Reference | Updated Liner Name/Reference |
|---|---|
| AccuLock S (Dual Lock) Liner | Front Load Liner |
| Conventional Liner | Rear Load Liner |
| QUICK LOAD® Pro Liner (Automation Only) | E-Z Feed™ Liner |
| QUICK LOAD® | (There is no name change for this product) |
If you have any questions, please call or email our Customer Service team at 855.644.9353 (MIGWELD) or cs@itwmig.com.
Discontinued: TOUCH LOCK® standard duty gas diffuser, Part Number 404-25
Discontinued: TOUCH LOCK® standard duty gas diffuser, Part Number 404-25
Due to low demand, effective February 7, 2025, Tregaskiss will discontinue TOUGH LOCK standard duty gas diffuser 404-25.
TOUGH LOCK standard duty gas diffuser 404-10-25 directly replaces 404-25.This replacement is compatible with tapered, standard duty contact tips (403-2-XX, where XX represents wire size).
Diffuser 404-10-25 includes a set screw, as shown in the image below. No adjustments will need to be made to the set screw before or after installation. Previously, 404-25 did not have a set screw.
For questions, please contact Customer Service by phone at 1.855.MIGWELD (644.9353) or email at cs@itwmig.com.
Discontinued Parts: Jacketed Liners, LJ-XXXX-XX
Discontinued Parts: Jacketed Liners, LJ-XXXX-XX
Due to low demand, effective January 17, 2025, the following jacketed liners will be discontinued:
| Part Number | Description |
|---|---|
| LJ-3545-15 | Jacketed liner, 0.035″ – 0.045″, 15′ |
| LJ-3545-25 | Jacketed liner, 0.035″ – 0.045″, 25′ |
| LJ-5262-12 | Jacketed liner, 0.052″ – 1/16″, 12′ |
| LJ-5262-15 | Jacketed liner, 0.052″ – 1/16″, 15′ |
| LJ-5262-25 | Jacketed liner, 0.052″ – 1/16″, 25′ |
There is no suggested replacement for these items. These jacketed liners were previously used in semi-automatic applications but are no longer compatible with our current MIG gun offerings.
For questions, please contact Customer Service by phone at 1.855.MIGWELD (644.9353) or email at cs@itwmig.com.
Discontinued Products – AutoLength™ Power Pins
Discontinued Products – AutoLength™ Power Pins
To continue to provide the best products and solutions to our customers, we routinely review, assess and evaluate our product line-up to ensure their features and benefits still hold their value. Accordingly, we have decided to discontinue our AutoLength™ power pins, effective January 10, 2025.
These AutoLength pins are currently used across both semi-automatic and robotic/fixed automatic product lines. Until the effective date, you can still purchase existing configurations as well as replacement AutoLength pins (or until inventory is depleted, whichever occurs first).
The charts below show the standard power pin that replaces each AutoLength option for both welding applications. You may also find instructions here for replacing an AutoLength power pin with a standard power pin.
To configure a new MIG gun part number using a standard power pin, please utilize our online configurators. Your new configuration will also include a full parts list.
If you have any questions or need assistance configuring a new gun or finding a replacement part number, please contact our Customer Service Team by phone at 1.855.MIGWELD (1.855.644.9353) or via email at CS@itwmig.com.
PACKAGING CHANGE — Diffusers 404-XX, D-ATSH-100, D-ATTH-100
PACKAGING CHANGE — Diffusers 404-XX,
D-ATSH-100, D-ATTH-100
Effective October 11, 2024, the following 100-pack diffusers will be packaged in boxes instead of bags.
| 100-pack Diffusers | Description |
| 404-18 | TOUGH LOCK®, Standard Duty |
| 404-20 | TOUGH LOCK, HD |
| 404-26 | TOUGH LOCK, HD |
| 404-30 | TOUGH LOCK, HD |
| 404-31 | TOUGH LOCK, HD |
| 404-32 | TOUGH LOCK, HD for Robotic |
| D-ATSH-100 | AccuLock™ R Diffuser, Slip-On |
| D-ATTH-100 | AccuLock R Diffuser, Thread-On |
The box dimensions are 6” x 6” x 4” (15.24cm x 15.24cm x 10.16cm).
Discontinued Parts: QUICK LOAD® Liners, 415-30-XXQ, 415-564-XXQ, 415-332-XXQ
Discontinued Parts: QUICK LOAD® Liners, 415-30-XXQ, 415-564-XXQ, 415-332-XXQ
Due to low demand, effective December 13, 2024, the following QUICK LOAD liners will be discontinued:
- 415-30-6Q: QUICK LOAD liner, 0.30”, 6’
- 415-30-15Q: QUICK LOAD liner, 0.30”, 15’
- 415-564-6Q: QUICK LOAD liner, 1/16”-5/64”, 6’
- 415-564-15Q: QUICK LOAD liner, 1/16”-5/64”, 15’
- 415-564-25Q: QUICK LOAD liner, 1/16”-5/64”, 25’
- 415-332-15Q: QUICK LOAD liner, 3/32”, 15’
- 415-332-25Q: QUICK LOAD liner, 3/32”, 25’
As a suggested replacement, we offer conventional liners (rear loading).
| QUICK LOAD® Liner | Tregaskiss® Conventional Liner (Robotic/Automation) | Bernard® Conventional Liner (Semi-Auto) |
| 415-30-6Q | 415-30-25 | L2A-15 |
| 415-30-15Q | 415-30-25 | L2A-15 |
| 415-564-6Q | 415-564-6 | L6A-15 |
| 415-564-15Q | 415-564-15 | L6A-15 |
| 415-564-25Q | 415-564-25 | L6A-25 |
| 415-332-15Q | 415-332-15 | L7A-15 |
| 415-332-25Q | 415-332-25 | L7A-25 |
These liners are currently used across both semi-automatic and robotic/fixed automatic product lines. On the effective date, these seven QUICK LOAD liners will no longer be available, removed from our product configurators, and guns previously configured with these liners will no longer be available for purchase.
Please use our online configurators and/or consult Customer Service to find a suitable replacement by phone at 1.855.MIGWELD (644.9353) or email at cs@itwmig.com.
DISCONTINUED PRODUCT — BA1 COBOT MIG GUN
DISCONTINUED PRODUCT — BA1 COBOT MIG GUN
Effective January 1, 2025, all Tregaskiss® BA1 cobot air-cooled MIG guns will be discontinued and replaced with TOUGH GUN® CA3 robotic air-cooled MIG guns.
| Affected Part Numbers | Direct Replacements |
| All MIG gun part numbers beginning with BA12 | Replace digits “BA12” with “RA12” (the rest of the part number remains the same) |
| All replaceable unicable part numbers beginning with BA1U | Replace digits “BA1U” with “CA3U” (the rest of the part number remains the same) |
| All replaceable unicable part numbers beginning with EBA1U | Replace digits “EBA1U” with “ECA3U” (the rest of the part number remains the same) |
The change supports our commitment to maximize efficiencies and focus on delivering our best quality solutions to our customers.
Please contact your ITW sales representative with questions.
PRODUCT UPDATE — CHANGE TO THE CABLE USED ON TOUGH GUN® CA3 MIG GUNS
PRODUCT UPDATE — CHANGE TO THE CABLE USED ON TOUGH GUN® CA3 MIG GUNS
Effective January 1, 2025, as part of our ongoing commitment to focus on opportunities to innovate our product portfolio and continue delivering sustainable value to our customers, we will be making a change to the unicable used on our TOUGH GUN® CA3 robotic air-cooled MIG guns.
The new unicable provides better flexibility in cobot and conventional over-the-arm robotic welding applications.
It is important to note the amperage rating of the TOUGH GUN® CA3 MIG gun will change from 385-amp to 350-amp with mixed gases at 100% duty cycle (ratings are based on tests that comply with IEC 60974-7 standards).
There will be no change to configured TOUGH GUN® CA3 MIG gun part numbers or its replacement or service parts.
If you have any questions about this initiative, please contact your ITW sales representative.
NEW PRODUCT: SHROUDS FOR THE TOUGH GUN® TT4 REAMER AND WIRE CUTTER
NEW PRODUCT: SHROUDS FOR THE TOUGH GUN® TT4 REAMER AND WIRE CUTTER
We are pleased to announce the launch of our new reamer shroud and wire cutter shroud. These new shrouds are intended to encourage safe practices when the TOUGH GUN® TT4 reamers are used in cobot welding applications where the operator could be near the reamer during operation.
Moving forward, all TOUGH GUN® TT4A and TT4E reamers configured specifically for use in cobot welding applications will come factory-equipped with a reamer shroud, and if the reamer is configured with the wire cutter option, the wire cutter shroud will also be factory installed.
The wire cutter can be purchased with or without the wire cutter shroud, and the reamer and the wire cutter shrouds are both available for purchase separately for customers who would like to retrofit their existing equipment, but it is important to note that if retrofitting a reamer and/or a wire cutter manufactured before March 2024, additional components will be required.
Please contact our technical support team or your local ITW representative for additional assistance if trying to retrofit older models.
TT4-SHR
Reamer shroud only, for
TOUGH GUN® TT4 reamer
WC-400C
Wire cutter equipped
with wire cutter shroud
WC-400-SHR
Wire cutter shroud only,
for wire cutter
If you have further questions or would like more information, please contact your local ITW representative.
New Product: Chrome Zirconium AccuLock™ Contact Tips 0.052” and 1/16” – Now Available
New Product: Chrome Zirconium AccuLock™ Contact Tips 0.052” and 1/16” – Now Available
| T-A052ZH | 0.052″ (1.3 mm); qty. 10 |
| T-A052ZH-100 | 0.052″ (1.3 mm); qty. 100 |
| T-A062ZH | 1/16″ (1.6 mm); qty. 10 |
| T-A062ZH-100 | 1/16″ (1.6 mm); qty. 100 |
Please contact the Bernard and Tregaskiss Customer Service team by phone at 1.866.MIGWELD (644.9353) or email at cs@itwmig.com with any questions.
PRODUCT IMPROVEMENT – Change to Profile of TOUGH GUN® TA3 MIG Gun Connector Housings
PRODUCT IMPROVEMENT – Change to Profile of TOUGH GUN® TA3 MIG Gun Connector Housings
As part of our ongoing commitment to continuous improvement, we are making a change to the
TOUGH GUN® TA3 gun connector housing to accommodate an additional setscrew (see ‘Setscrew 2’
in Figure 2) which is designed to improve TCP repeatability when using long/extended length necks by providing additional support to help secure the neck firmly in place.
In order to make this change, extra thread engagement was required for the front setscrew which increased the profile of the front housing by 0.157” at the largest section (see Figure 3). And rather than the M6 x 1.0 setscrew currently used in our existing design, the new design uses two (2) M10 x 1.25 setscrews which have been tested and consistently achieved 340 in.-lbs. without causing any thread failures.
It is important to note that, like in our existing design, ‘Setscrew 1’ (see Figure 2) is responsible for the electrical (and mechanical) connection and must be installed and tightened properly, whereas ‘Setscrew 2’ is intended solely to achieve additional mechanical support. The sticker on the new gun connector housings has been revised to indicate a Step 1 / Step 2 approach (see Figure 4) to reflect this order of importance.
This incremental improvement will be rolled out as a running change as we work through current inventory, with full implementation targeted to be complete by the end of 2024.
If you have further questions or would like more information, please contact your local ITW representative.
PRODUCT UPDATE — Configurator Simplification: S-GUN™ Semi-Automatic MIG Gun Changes
PRODUCT UPDATE — Configurator Simplification: S-GUN™
Semi-Automatic MIG Gun Changes
Effective August 2024, we will simplify the configurable options of our S-Gun™ Semi-Automatic Air-Cooled MIG guns. The simplification plan includes the following:
- Cable options: Only available for 300 and 400 amps in lengths of 15 ft., 20 ft. and 25 ft.
- Handle options: Configurable with either T-Series handle (standard, locking triggers) or O-Series (standard trigger).
- Consumables: Configurable exclusively with AccuLock™ S; however, will remain compatible with entire consumable line-up to accommodate user preference.
- Power Pins: Offered with Miller®, Tweco® 4 (with Miller® lead), Euro or Lincoln® power pins.
The S-Gun™ options will be removed from the BTB Semi-Automatic Air-Cooled MIG guns online configurator. We will create a dedicated product page for S-Guns™ on our website, which will also include a separate spec sheet.
In November, we will introduce an online configurator for S-Guns™.
The options removed from the configurator will remain available for purchase until the end of 2024. After this period, these options will be re-evaluated for potential discontinuation.
These changes aim to provide a more efficient and user-friendly experience for customers.
If you have any questions or would like more information, please contact your local ITW representative.
S-Gun™ Semi-Automatic MIG Gun Timeline of Changes
Discontinued Part: Liner for 3/64”-1/16” Aluminum wire, 1910038
Discontinued Part: Liner for 3/64”-1/16” Aluminum wire, 1910038
Due to low demand, as of June 12th, 2024, part number 1910038 has been discontinued. This item can be directly replaced with part number 415-116-23.
Please contact the Bernard and Tregaskiss Customer Service team by phone at 1.866.MIGWELD (644.9353) or email at cs@itwmig.com with any questions.
