MT605 - Miller Smith MT605 6-Flame Acetylene Heating Tip for WH100 Handles

Technical Overview of the Miller Smith MT605 Heating Tip

The Miller Smith MT605 is a specialized medium-duty heating tip designed for professional oxy-acetylene applications. Engineered by Smith Equipment (now under the Miller Electric umbrella), this tip is part of the renowned MT Series, known for delivering consistent high-volume heat for industrial metalworking. The MT605 is specifically calibrated for use with Acetylene or Hydrogen fuel gases and is not suitable for alternate fuels like Propane or Propylene. It features a multi-flame configuration with six distinct ports, utilizing a drill size of 56 to optimize gas flow and flame stability.

With an average heat output of 73,085 BTUs per hour, the MT605 provides the thermal intensity required for tasks such as pre-heating weldments, straightening distorted structural members, and brazing heavy copper or steel components. The tip measures 16 inches in overall length, providing the operator with sufficient reach and distance from the radiant heat of the workpiece. The head is manufactured from solid copper, a material choice that ensures superior thermal conductivity and resistance to deformation under prolonged high-temperature use.

Compatibility and Safety Requirements

This heating tip is designed to fit specific medium-duty torch handles, including the Smith WH100, MW5A, and CW5A models. Proper seating and seal integrity are critical for safe operation. Users must be aware of gas withdrawal rates; while the MT605 is efficient, high-volume heating tips can exceed the safe withdrawal rate of a single acetylene cylinder (1/7th of the cylinder capacity per hour). For continuous heavy use, manifolding cylinders may be necessary to prevent solvent withdrawal from the acetylene tank. Additionally, the use of high-flow flashback arrestors is strongly recommended to maintain safety without starving the tip of necessary flow, which could otherwise lead to backfires or flashbacks.

Operational Specifications

The MT605 operates effectively within specific pressure ranges tailored to the medium-duty class. It is essential to consult the pressure charts provided by Miller Smith for the specific regulator settings to achieve a neutral flame. The six-flame design ensures that heat is spread over a wider area than a welding tip, reducing the risk of localized melting while pumping enough energy into the metal to reach plastic states for forming or bending. This balance makes it an indispensable tool for MRO (Maintenance, Repair, and Operations) environments where versatility is key.