
THD In-Line Butt Welder | Steel Rod
Micro Weld’s Model THD is an in-line butt welder built for the continuous processing of steel rod, trusted by manufacturers worldwide for durable, seamless operation. It joins solid steel, stainless, and titanium rod from .125 to .500 in (3.17–12.70 mm) using solid-state heat control, hand-operated clamps, and a spring-actuated upset — a straightforward, air-free design that keeps maintenance low and throughput steady. Mounted on a heavy-duty caster truck and offered in 240, 480, or 600 volt configurations, the THD handles demanding in-line rod welding with speed, precision, and reliability.
- 240V, 480V or 600V 60Hz, single phase
- Solid state heat control
- Hand operated clamps
- Spring actuated upset
- Heavy duty truck with casters
Width Across the Front: 39 in (99.06 cm)
Depth to the Back: 29 in (73.66 cm)
Height: 46 in (116.84 cm)
Weight: 560 lbs (253.96 kg)
- 1/2 H.p. Vertical Grinder
- Cam Anneal With Brackets
- Standard Vise
- Grinder Outlet with Stepdown Transformer


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
Continuous in-line steel rod processing
Wire and rod drawing lines requiring coil joining
Feedstock joining for fastener, spring, and wire-form production
Small-diameter tubing and rod stock
Steel, stainless, and titanium rod up to .500 in
Real-World Benefits
- Built for continuous processing: The in-line design keeps rod moving through drawing and forming lines with minimal interruption.
- Simple, air-free operation: Hand-operated clamps and a spring-actuated upset mean no compressed-air supply and fewer components to maintain.
- Repeatable heat: Solid-state heat control delivers consistent energy for uniform welds.
- Finishing on board: A 1/2 HP vertical grinder, cam anneal with brackets, and a grinder outlet with step-down transformer support clean-up and conditioning at the machine.
- Shop-floor mobility: A heavy-duty caster truck lets the welder move to where the line needs it.

Comparison to Similar Models
Like the J8S, the THD is a solid-steel, mechanical-upset machine covering roughly the same diameters (.125–.500 in). The difference is workflow: the THD’s in-line layout, hand clamps, and spring-actuated upset are configured for continuous rod-line processing, while the J8S is a standalone piece welder with a pivot headpiece and foot-pedal clamping. For larger solid steel rod or higher production volumes, step up to the motorized-cam MD series. Micro Weld also lists the ADX-1.1 and HX.1 as related in-line and compact options worth comparing.
Best For
- Operations running continuous in-line steel rod processing
- Wire and rod lines that need reliable coil joining
- Shops wanting a simple, air-free welder for rod up to .500 in








