MC40-3 - Smith MC40-3 Propane Cutting Tip Size 3 for Medium Duty Torches

Advanced Engineering for Propane Cutting

The Smith MC40-3 Propane Cutting Tip is a premium consumable designed to bring precision and safety to medium-duty oxy-fuel cutting applications. Specifically engineered for use with propane and natural gas, this Size 3 tip features a sophisticated two-piece construction. Unlike single-piece acetylene tips, the MC40-3 utilizes a separate outer shell and inner member. This configuration is critical for alternate fuels, as it creates the necessary turbulence and flame seating required to maintain a stable, high-temperature preheat flame capable of bringing steel to ignition temperature efficiently.

Safety is a cornerstone of the Smith Equipment design philosophy, and the MC40 series exemplifies this with its In-Tip Gas Mixing technology. By keeping the oxygen and fuel gas streams separate until they reach the mixing chamber within the tip itself, the system significantly reduces the volume of mixed gas present in the torch handle. This design drastically lowers the risk of flashback and sustained backfire, protecting both the operator and the equipment. Additionally, the tip features a concave-shaped end. This recessed geometry protects the critical gas orifices from damage caused by accidental contact with the workpiece and creates a stagnation zone that helps anchor the flame, further resisting flameout.

Performance is enhanced through Smith's manufacturing process, which includes a fully swaged smooth bore. This mirror-finish internal surface minimizes gas turbulence, ensuring a laminar flow of the cutting oxygen stream. For the operator, this translates to a tighter, more coherent cutting jet that produces clean, narrow kerfs with minimal slag accumulation. With a cutting capacity of up to 2 inches (51 mm), the MC40-3 is an indispensable tool for industrial fabrication, scrap processing, and maintenance operations using Smith medium-duty attachments like the DG109A, MC505, and MC509. The tip also features a seat design that resists nicking, ensuring a leak-proof seal and extended service life.