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

Superior Cuts with Genuine Smith Tips

Maximize the performance of your oxy-propane setup with the Smith MC40-3 Propane Cutting Tip. Designed for welders who demand reliability and clean results, this Size 3 tip is the ideal choice for cutting steel up to 2 inches (51 mm) thick. Whether you are working in a fabrication shop, on a farm, or in an automotive garage, the MC40-3 delivers the heat and precision you need to get the job done right. Optimized for propane and natural gas, it offers a cost-effective and clean-burning alternative to traditional acetylene cutting.

The MC40-3 is built to withstand the rigors of daily use. It features a rugged two-piece design consisting of a brass inner member and a copper outer shell. This construction allows for easy cleaning and maintenance while providing the heavy preheat flame necessary for piercing plate steel quickly. One of the most user-friendly features is the concave tip end. By recessing the face of the tip, Smith has created a design that is highly resistant to backfires, even when the tip is brought close to the molten puddle. This means fewer interruptions, less popping, and a safer cutting experience for you.

Quality cuts start with a quality stream, and the MC40-3 delivers with its fully swaged smooth bore. This precision manufacturing process ensures that the high-pressure oxygen stream remains tight and focused, blowing through metal with efficiency. The result is a cleaner cut face with significantly less slag on the bottom edge, saving you valuable time on grinding and cleanup. Compatible with a wide range of Smith medium-duty cutting attachments—including the DG109A, MC505, MC509, CC509P, and AC309—this tip is a versatile addition to any welder's toolkit. Choose Smith for consistent starts, stable flames, and the durability to last through the toughest jobs.