T series straight handle option for BTB semi-automatic air-cooled MIG guns

O series small curved handle option for BTB semi-automatic air-cooled MIG guns

S-Gun™ Semi-Automatic Air-Cooled MIG Guns

The Bernard® S-Gun's steel monocoil cable resists pinching to keep gas flowing and wire feeding reliably, even in hard-to-feed applications, so you spend less time on downtime and more time welding.

250-400 AMP

AIR-COOLED

DUTY-CYCLE 60%

ACCULOCK™ S CONSUMABLES

GMAW/MIG

2 HANDLE STYLES

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Configured for your job
Handles a wide range of wire
Durable Build

Overview

Weld longer with less downtime. The Bernard® S-Gun’s steel monocoil cable stands up to pinching and crushing, keeping gas flow consistent and wire feeding smoothly even in hard-to-feed applications. Configure it with the neck, handle, and trigger that fit your operators, plus AccuLock™ S consumables, for a gun built around your work. The result is better comfort, higher productivity, and a lower total cost of ownership. Available in 250, 300, and 400 amps.

Specifications

Amperage rating	250, 300 & 400 Amp 60% Duty Cycle with Mixed Gases
Cooling	Air-Cooled
Wire Size Range	0.030″–5/64″ (0.8–2.0 mm)
Cable Lengths	15, 20, 25ft
Consumable System	Acculock S
Handle Styles	O Series Small Curved, T Series Straight

Consumables

Recommended: AccuLock™ S
Also compatible: Centerfire™ · Quik Tip™ · TOUGH LOCK®
Limited: TOUGH ACCESS™
Not compatible: AccuLock™ R
Applies to S-Gun™ MIG guns. See spec sheet for part numbers and details.

Accessories

Sold separately. Refer to the spec sheet for part numbers and details.

Flex Neck
Jump Liners
Neck Grips
Q-Neck Coupler
Gun Hanger
Heat Shield

Configurator

Build Your Gun
Use the Configurator to build your custom gun by walking through the selection process. Choose the options you need for your application and generate the right part number.

S40  15  M  E  4  D  M  A   →   S4015ME4DMA
 │    │  │  │  │  │  │  └─ Liner
 │    │  │  │  │  │  └──── Power pin
 │    │  │  │  │  └─────── Wire size
 │    │  │  │  └────────── Consumables
 │    │  │  └───────────── Neck
 │    │  └──────────────── Handle / trigger
 │    └─────────────────── Length (ft)
 └──────────────────────── Amperage

Amperage (steel monocoil cable)

S20	S30	S40
250 A	300 A	400 A
≤ 1/16″	≤ 5/64″	≤ 5/64″

Length

15	20	25
4.6 m	6.1 m	7.6 m

Handle / Trigger (all fit S20, S30, S40)

Handle	Standard	Locking
T Series Straight	M	N
O Series Small Curved	T	—

Neck

	Short 45°	Short 60°	Med 45°	Med 60°	Long 45°	Long 60°
Rotatable	B	C	E	F	H	I
Fixed	O	P	R	S	U	V

Consumables

4	9
AccuLock™ S (front-load liner)	AccuLock™ S (rear-load liner)

Wire Size

Steel	B	C	D	E	H	I	K
in	.030	.035	.039	.045	.052	1/16	5/64
mm	0.8	0.9	1.0	1.2	1.4	1.6	2.0

Aluminum	Q	R	S
in	.035	3/64	1/16
mm	0.9	1.2	1.6

Power Pin

E	L	M	S
Euro	Lincoln	Miller	Tweco #4 (Lincoln lead)

Liner

A	C
Front load	Rear load

Compatibility rules

Consumables 4 → front-load liner A only
Consumables 9 → rear-load liner C
Euro pin E → not compatible with liner A (use C)
S20 → wire up to 1/16″ only (no K)

Most common part numbers

S4015TE5EMC S-Gun 400 A, 15′, O Series curved handle, rotatable medium 45° neck, AccuLock™ S, 0.045″ wire, Miller® pin, rear-load liner S2515TE5EM S-Gun 250 A, 15′, O Series curved handle, rotatable medium 45° neck, AccuLock™ S, 0.045″ wire, Miller® pin S3015TE5HMC S-Gun 300 A, 15′, O Series curved handle, rotatable medium 45° neck, AccuLock™ S, 0.052″ wire, Miller® pin, rear-load liner S3015TE8EMC S-Gun 300 A, 15′, O Series curved handle, rotatable medium 45° neck, Centerfire™, 0.045″ wire, Miller® pin, rear-load liner S4015TE5IMC S-Gun 400 A, 15′, O Series curved handle, rotatable medium 45° neck, AccuLock™ S, 1/16″ wire, Miller® pin, rear-load liner

Get the info you need

Resources & documentation

Spec Sheet PDF · EN Owner's Manual PDF · EN

See it, learn it, trust it

Videos, guides & customer stories

How To Guide Common Problems With MIG Welding Consumables and How to Fix Them Front-End Consumable, General Troubleshooting, Liner

Videos Welding Students in Tulsa Benefit from Bernard® MIG Guns and Consumables Case Study Reference Gun Series Compatibility with Consumables and Liners How To Guide How to Choose MIG Welding Gun Parts General Overview

Videos Bernard® BTB Gun Transforms Aluminum Welding for 4-Star Trailers Case Study Reference New Liners Trim Length Chart How To Guide How to Prevent 5 Common Welding Gun Failures General Troubleshooting

Videos Bernard® & AccuLock™ Drive Productivity at East Lake Mfg. Case Study How To Guide How to Select AccuLock™ S Consumables Front-End Consumable

Videos Vactor’s Formula for Better Welding Case Study How To Guide How to Prevent Common Causes of Poor Welding Wire Feeding General Troubleshooting

Videos VIDEO | AccuLock™ S with Dual-Locking Liner System — Part 3: Reusing an AccuLock S Dual-Locking Liner Handle How To Guide How to Reduce Welding Gun Wear and Extend Gun Life General Maintenance

Videos VIDEO | AccuLock™ S with Front Load Liner System — Part 2: Optimizing Front-End Consumable Life How To Guide How to Install Front Load Liners Using Power Pin Cap With Set Screw

Videos VIDEO | AccuLock™ S with Front Load Liner System — Part 1: Addressing the Pains of Rear Load Liners Handle How To Guide How to repair the cable on a MIG Gun with a T Series Straight Handle How To Guide How To Install or Replace a Fixed Neck on a Straight Handle Gun How To Guide How To Install a Jump Liner

Where to buy

Buy through an authorized distributor

Find a distributor near you