0333-0369 - Victor 5-MTHN Propane Machine Cutting Tip for 4.5-Inch Steel

Technical Overview of the Victor 5-MTHN Cutting Tip

The Victor 0333-0369 5-MTHN Cutting Tip is a specialized consumable designed for high-precision industrial applications involving automated machine cutting. Engineered as part of the Series 1 Type MTHN line, this tip is specifically calibrated for use with alternative fuel gases, primarily Propane and Natural Gas. Unlike standard acetylene tips, the MTHN series utilizes a two-piece construction consisting of a brass inner member and a copper outer shell. This design is critical for alternative fuels, as it allows for the necessary recess of the flame to anchor it effectively at high velocities, ensuring a stable preheat flame even during rapid machine travel speeds.

With a designated Tip Size of 5, this component is rated for a substantial cutting capacity, capable of severing material thicknesses up to 4-1/2 inches (approximately 114 mm). This places the 5-MTHN in the heavy-duty category, suitable for structural steel fabrication, shipbuilding, and heavy equipment manufacturing where thick plate processing is routine. The internal geometry of the tip is precision-machined to optimize the oxygen stream, maintaining a tight, coherent cutting jet that minimizes kerf width and slag accumulation. This is essential for machine cutting, where edge quality and dimensional accuracy are paramount to reduce secondary machining operations.

The compatibility of the 0333-0369 extends to high-speed machine torches that accept Victor-style MTHN consumables. The separation of the inner and outer parts not only facilitates the unique combustion requirements of propane but also simplifies maintenance. If the outer shell becomes damaged from spatter or impact, it can often be replaced independently of the inner member, or the assembly can be easily disassembled for thorough cleaning of the preheat splines. This maintainability contributes to a lower total cost of ownership in high-volume production environments.

Operators and procurement specialists should note that this tip is strictly for use with Propane or Natural Gas and is not compatible with Acetylene. The specific BTU output and flame characteristics required for cutting 4-1/2 inch steel with propane demand the specific flow rates and mixing dynamics provided by the size 5 orifice. Proper gas pressure settings, typically higher for the cutting oxygen compared to smaller tips, are required to achieve the rated performance and cut quality.