MC12-3 - Smith MC12-3 Medium Duty Acetylene Cutting Tip Size 3

Smith MC12-3 Acetylene Cutting Tip: Precision and Safety

The Smith MC12-3 is a premium medium-duty cutting tip designed for professional oxy-acetylene cutting applications. Engineered by Smith Equipment (a division of Miller Electric), this Size 3 tip is capable of slicing through steel ranging from 1-1/2 inches to 2 inches (38mm to 51mm) in thickness. It is an essential consumable for fabricators, maintenance crews, and metalworkers who rely on the versatility of Smith's medium-duty torch systems.

Advanced In-Tip Mixing Technology

Safety is paramount in oxy-fuel operations, and the MC12-3 addresses this with Smith's renowned "in-tip mix" technology. Unlike standard torches that mix gases in the handle or tube, this tip mixes the oxygen and acetylene inside the tip itself. This design significantly reduces the volume of mixed gas present in the system at any given time, thereby minimizing the potential for flashback and sustaining backfire. If a flashback does occur, it is contained within the tip, protecting both the operator and the expensive torch handle and attachment.

Superior Construction and Performance

Manufactured from high-quality copper, the MC12-3 is swaged to create ultra-smooth internal gas passages. This manufacturing process reduces turbulence in the gas flow, resulting in a stable preheat flame and a coherent cutting stream. The smooth finish also helps minimize slag accumulation on the tip face, allowing for longer intervals between cleanings. The tip features a concave end which further aids in protecting the orifices from damage and resisting flameout when working close to the base metal.

Convenient Slip-In Design

One of the standout features of the Smith MC12 series is the "Slip-In" connection. The tip can be inserted into the cutting attachment and tightened by hand—no wrench is required. This innovative design utilizes a recessed, heat-resistant seat that is protected from nicks and drops, ensuring a perfect, positive seal every time. This feature not only speeds up tip changes in the field but also reduces wear and tear on the torch head threads.

Operational Specifications

To achieve optimal performance with the MC12-3, operators should adhere to the recommended flow rates. The tip requires a cutting oxygen flow rate of 170-181 SCFH, a preheat oxygen flow rate of 12 SCFH, and a preheat acetylene flow rate of 10 SCFH. Proper pressure settings ensure clean cuts with minimal dross and maximize the lifespan of the consumable.