WP-18 - Miller Weldcraft W-350 Replacement Torch Body

Product Overview

The Weldcraft W-350 (formerly known as the WP-18) TIG Torch Body is a premium replacement component designed for industrial welding environments requiring high-amperage output and continuous duty cycles. Manufactured by Miller Electric under the Weldcraft brand, this torch body is engineered to withstand the rigors of heavy fabrication while maintaining optimal performance. The W-350 is a water-cooled system, essential for managing the heat generated during welding operations at currents up to 350 amps. This specific model features a rigid head design, providing a fixed angle that offers stability and durability for standard welding positions.

Technical Specifications and Compatibility

This torch body is rated for 350 amps DC and is fully compatible with the 18 Series TIG consumable ecosystem. One of the key logistical advantages of the W-350 platform is its cross-compatibility with other series; specifically, the front-end parts (collets, collet bodies, gas lenses, and alumina cups) are interchangeable with the air-cooled WP-17 and WP-26 series torches. This reduces inventory complexity for shops that utilize multiple torch types. The body itself connects to standard water and power cables designed for the 18 series, ensuring a leak-free and conductive connection.

Construction and Durability

Constructed from high-grade copper and heat-resistant silicone rubber insulation, the W-350 torch body is built to resist cracking and electrical leakage. The water-cooling chambers are precision-engineered to maximize flow rate, effectively dissipating heat away from the tungsten electrode and the operator's hand. This thermal management is critical for preventing torch failure and ensuring consistent arc stability over long shifts. As a genuine Weldcraft component, it meets strict quality assurance standards, offering a reliable solution for maintenance and repair operations (MRO) looking to minimize equipment downtime.

Application Suitability

The W-350 is ideally suited for industries such as aerospace, shipbuilding, automotive manufacturing, and precision pipe welding where water-cooled systems are standard. Its robust design supports continuous production welding without the overheating issues often associated with air-cooled alternatives at higher amperages. By investing in genuine OEM replacement parts like the MILWP-18, facilities ensure their welding equipment operates within factory specifications, preserving the longevity of the entire welding system.