SC60-2 - Smith SC60-2 Size 2 Heavy-Duty Propylene Cutting Tip

Technical Overview of the Smith SC60-2 Propylene Cutting Tip

The Smith SC60-2 is a heavy-duty, size 2 cutting tip engineered specifically for use with propylene and propylene-based fuel gases. Designed to meet the rigorous demands of industrial metal fabrication and MRO applications, this tip features a robust two-piece construction. It is rated to cut mild steel ranging from 3/4 inch to 1-1/4 inches (19 mm to 32 mm) in thickness. The SC60 series is renowned for its reliability and performance in heavy-duty environments, making it a standard choice for professionals utilizing Smith equipment.

Technically, the SC60-2 utilizes an in-tip gas mixing methodology. This design feature is critical for safety and efficiency; by combining the preheat oxygen and fuel gas within the tip itself rather than in the torch head, the system significantly reduces the volume of mixed gas present. This adds a substantial layer of resistance against flashbacks and sustained backfires. The tip requires a cutting oxygen flow rate of 105–135 SCFH, a preheat oxygen flow rate of 38 SCFH, and a preheat propylene flow rate of 9 SCFH to achieve optimal thermal dynamics for cutting.

The physical geometry of the tip includes a concave-shaped end. This recess helps protect the orifice from damage if the torch accidentally touches the workpiece and aids in resisting flameout. Furthermore, the internal bore is fully swaged and smooth, which promotes laminar gas flow. This results in a stable flame, faster starts, and significantly minimized slag accumulation, ensuring that cuts are clean and precise. The tip seats are designed to resist nicking, ensuring a tight seal and longer operational life.

This tip is compatible with a wide range of Smith equipment, including DG200 and SC200 series cutting attachments (up to size SC60-5), all Smith SC and DG series hand torches, Smith 2-hose cutting torches (up to size SC60-6), and all Smith 3-hose machine cutting torches. It is also suitable for use with machine torches SC770 and SC772A.