Miller Smith 1504 Replacement Heating Tip Head for ST625/ST628

Heavy-Duty Heating Power: Miller Smith 1504 Replacement Head

The Miller Smith 1504 Replacement Head is the definitive solution for welders and fabricators looking to extend the life of their ST625 and ST628 heating tips. In the world of heavy fabrication, heating tips are subjected to extreme conditions, often facing damage from molten spatter, accidental drops, or general wear from intense thermal cycling. Instead of discarding the entire expensive tip assembly, the 1504 replacement head allows you to swap out the worn business end, restoring your torch's heating capacity to factory specifications instantly.

This head is specifically calibrated for "alt fuels"—Propane and Natural Gas—which are increasingly popular due to their cost savings and availability compared to Acetylene. It is crucial to note that this head is not designed for Acetylene use; it is engineered to handle the specific flow rates and combustion characteristics of alternate fuels. With Propane, it unleashes a torrent of heat, rated at approximately 455,000 BTUs, making it a powerhouse for preheating heavy plate prior to welding. This ensures that the base material reaches the correct interpass temperature, reducing the risk of hydrogen cracking and ensuring code-compliant welds on thick sections.

The construction of the 1504 features a heavy-duty copper alloy designed to withstand high temperatures and resist deformation. The fluted flame ports are precision-machined to create a stable, high-velocity flame that resists popping and backfire, even when the tip is hot. This stability is essential when performing long-duration heating tasks such as cambering beams, heat-shrinking steel, or bending large pipe sections. The wide flame pattern covers a large surface area, allowing for faster work and reduced gas consumption over time.

Compatibility is key with the 1504. It fits seamlessly with the Miller Smith ST600 series heavy-duty heating tips (specifically the ST625 and ST628 models). Installing the replacement head is straightforward, requiring standard tools to secure it to the mixer tube. For welders who demand performance and longevity from their oxy-fuel gear, keeping a spare 1504 head in the toolbox is a smart move. It ensures that when a job requires massive heat input, your equipment is ready to deliver without hesitation. Trust in the legacy of Smith Equipment's gas apparatus to keep your fabrication projects moving forward safely and efficiently.