
J4S Steel & Stainless Wire Butt Welder
Transform your welding operations with the JS Series Micro Weld Butt Welders — engineered for durability, performance, and consistent, high-quality welds on solid steel, stainless, and titanium wire and rod up to .5 in (12,7 mm) across the range. The J4S is the versatile mid-range model, welding solid steel from .040 in (1,01 mm) to .160 in (4,06 mm). An extra heavy-duty transformer enables continuous processing, and solid-state 99-step SCR heat control gives the fine, repeatable heat stainless and titanium demand. Foot-actuated dual-action clamping and upset free both hands for wire handling, on 120V, 240V, or 480V single-phase power.
Width Across the Front: 24 in (61 cm)
Depth to the Back: 24 in (61 cm)
Height: 53 in (136 cm)
Weight: 180 lbs (82 kg)
- Work Lamp With Bracket
- Filing Vise With Bracket
- Complete Front Anneal
- Standard Top Anneal
- ETS-Type Hand Shear
- 600 Volts – 60 Hertz Service
- Dial Indicator For Front Anneal
- 1/3 HP Grinder


Butt Welder Upgrades to Improve Your Precision and Productivity
Upgrade your Micro Weld butt welders with world-class safety & technology accessories. You’ll get the same quality, rugged welders with the safety features you need, creating uniformity with every machine and consistency with every training.
- New Finger Safe Covers & Components
- 24V Control Circuit
- Interlock Switch on Rear Access Panel
- Solid-State Heat Control
Applications
Joining mid-range solid steel, stainless, or titanium wire and rod ahead of drawing, forming, or coiling
Continuous-line splicing in spring, fastener, wire-form, fencing, and reinforcing-mesh production
Rejoining stock on payoff and take-up lines to keep a running line fed
Stainless and titanium wire and rod joining where a clean, full-strength butt weld is required
Real-World Benefits
- Extra heavy-duty transformer supports continuous processing of steel wire and rod without duty-cycle stalls.
- Solid-state 99-step SCR heat control delivers fine, repeatable heat selection — important for consistent results on stainless and titanium.
- Foot-actuated, dual-action clamping and upset keep both hands free for wire handling and give a consistent, operator-independent upset.
- Selectable 120V, 240V, or 480V single-phase power makes the machine easy to drop into most shop services.
- Mobile 4-wheel truck lets the station move to the line; anneal, vise, shear, and grinder options handle prep, weld, and finish.

Comparison to Similar Models
The “S” marks the J4S as part of the ferrous JS Series — solid steel, stainless, and titanium — as opposed to the non-ferrous JC line or the flat-stock JSF line on the same chassis. The number sets capacity.
The J4S is the versatile mid-range JS model, welding solid steel from .040 in to .160 in (1.01–4.06 mm) in a compact 180-lb footprint. Choose it over the J3S when your wire runs heavier; step up to the J5S (.060–.250 in) or J6S (.187–.375 in) for larger rod. For copper/aluminum use the JC line; for flat strip, the JSF line.
Best For
Shops running mid-range solid steel, stainless, or titanium wire and rod (.040–.160 in) — springs, fasteners, wire forms, fencing — a strong general-purpose default when your stock is mid-gauge.




