Smith Little Torch Size 2 Curved Tip for Acetylene and Hydrogen

Technical Specifications and Performance

The Smith 12-1401-02 Curved Tip is a size #2 nozzle engineered for the Smith Little Torch system, specifically calibrated for use with Acetylene and Hydrogen fuel gases. In industrial MRO, laboratory, and precision fabrication environments, this tip offers a reliable solution for micro-joining applications where heat input must be strictly controlled to prevent distortion or heat-affected zone (HAZ) issues. The tip is rated for a heat output of 130 BTU/hr, providing sufficient thermal energy for brazing and welding thin-gauge materials.

Orifice Technology

Central to the performance of the 12-1401-02 is the inclusion of a synthetic sapphire orifice. This insert is laser-drilled to a precise diameter of 0.006 inches (Drill Size 97). The hardness of the sapphire material prevents erosion of the orifice caused by high-velocity gas flow, a common failure mode in standard copper or brass tips. This ensures that the flow characteristics—0.09 CFH for fuel and 0.11 CFH for oxygen—remain constant over the service life of the consumable. The result is a stable, non-fluctuating flame that technicians can rely on for critical bonds.

Operational Parameters

This tip is designed to operate at low pressures, requiring only 2 PSI for both oxygen and fuel gas. This low-pressure operation is critical for maintaining the stability of the micro-flame and preventing blowout. It is important to note that this specific tip size is not compatible with Propane or Natural Gas; it is optimized for the combustion velocities and flame propagation rates of Acetylene and Hydrogen. The curved geometry of the tube facilitates access to obscured joints and allows for better torch manipulation in complex assemblies.

For professionals requiring a dependable micro-flame for electronics repair, thermocouple welding, or fine instrument fabrication, the Smith #2 Curved Tip delivers industrial-grade consistency. Its ability to melt metals, glass, and ceramics highlights the thermal intensity achievable even with such a small orifice, provided the correct fuel gases are utilized.