RW-1 Ring Welder | Steel Rings .03–.187 in
Steel Ring, Titanium
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Butt Welder
RW-4 Ring Welder | Steel Rings to .5 in
The RW-4 tops Micro Weld’s RW series, joining the largest rings the platform handles — solid steel and titanium from .250 to .500 in (6.35–12.7 mm). Engineered for high-speed piece production and coil-to-coil wire welding, it delivers the highest upset force in the series through electrically controlled, pneumatically actuated clamps and Interlock 108 SCR weld control. Its 550 lb frame provides the stability heavier ring stock demands, making the RW-4 the right choice for the most substantial ring and loop welding within the RW range.
- 240V or 480V, 60 Hz, single phase
- Interlock 108 SCR weld control
- Electrically controlled, pneumatically actuated clamps and upset
- Heavy duty truck with casters
Metal:
Steel Ring, Titanium
Construction:
Ring
Solid Steel Welding Range:
.250 in (6,35 mm) - .500 in (12,7 mm)
Max Current Draw:
196/98/79
Single Phase Transformer:
Yes
Heat Selection Method:
99 STEPS SCR
Upset Method:
Air
Air Requirements:
100psi
Mounting Truck Type:
4 Wheels
Dimensions & Weight:
Welding Die Height: 44 in (113.03 cm)
Width Across the Front: 31 in (78.74 cm)
Depth to the Back: 31 in (78.74 cm)
Height: 49 in (124.46 cm)
Weight: 550 lbs (250 kg)
Width Across the Front: 31 in (78.74 cm)
Depth to the Back: 31 in (78.74 cm)
Height: 49 in (124.46 cm)
Weight: 550 lbs (250 kg)
- Standard Mechanical Anneal Device
- Pneumatically Operated Anneal Device
- Water Cooling Package
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
Larger welded rings, loops, and D-rings
Heavy chain links and connecting hardware
Lifting and rigging rings up to .500 in
Larger formed ring and loop components
Steel and titanium ring products at the top of the range
Real-World Benefits
- Maximum series capacity: Handles the largest rings in the RW line, up to .500 in.
- Highest upset force: Delivers the pressure heavier ring stock needs for sound welds.
- Stable platform: The 550 lb frame keeps larger rings positioned securely during welding.
- Clean, quick cycles: Pneumatically actuated upset supports efficient high-piece-count runs.
- Repeatable quality: Interlock 108 SCR weld control keeps energy consistent across cycles.
Comparison to Similar Models
The RW-4 is the largest-capacity ring welder in the series, extending beyond the RW-3 (.187–.375 in) to a .500 in maximum and overlapping the RW-3 through the .250–.375 in band. For smaller rings, the RW-1, RW-2, or RW-3 will be more suitable. If your work involves solid steel rod rather than formed rings at these diameters, the J8S or THD are the better platforms — the RW-4 is optimized specifically for closing larger rings and joining coil ends.
Best For
- Producers of larger steel or titanium rings, up to .500 in
- Heavy chain, hook, and rigging-hardware manufacturing
- The most substantial ring and loop work within the RW range