6290NX-5 - Harris Style 6290NX-5 Propane Cutting Tip - Size 5 Heavy Duty

Heavy-Duty Propane Cutting Performance

The Generic 6290NX-5 Cutting Tip is a premium aftermarket replacement component engineered to deliver exceptional performance in heavy industrial cutting applications. Designed specifically for use with alternate fuels such as Propane and Natural Gas, this tip utilizes the industry-standard 6290NX geometry to ensure seamless compatibility with all Harris-style cutting torches and cutting attachments. As a Size 5 tip, it is categorized for heavy-duty work, capable of severing steel plates ranging from 6 inches to 8 inches (approx. 150mm to 200mm) in thickness.

Technical Construction & Efficiency

Unlike standard acetylene tips, the 6290NX-5 features a robust two-piece construction. This design consists of a brass inner member with splined passages for preheat gas flow and a heavy-wall copper outer shell. This configuration is critical for alternate fuels, as it allows the flame to anchor properly and withstand the higher radiant heat generated during the cutting of thick materials. The separation of the inner and outer parts also facilitates easier cleaning and maintenance, extending the service life of the consumable in harsh environments.

Operational Specifications

To achieve optimal cut quality and maintain safety, this tip requires specific pressure settings. Operators should set their oxygen pressure between 65 and 80 PSI to ensure a clean, forceful cutting stream capable of penetrating up to 8 inches of steel. The oxygen flow rate for this tip is substantial, ranging from 710 to 860 SCFH, ensuring that the exothermic reaction is sustained throughout the depth of the cut. The preheat flame is designed for general purpose to heavy preheat, making it suitable for cutting dirty or rusted plate where extra thermal energy is required to maintain the puddle.

Application & Compatibility

This tip is an essential consumable for fabrication shops, scrap yards, and demolition crews utilizing Harris equipment. It fits directly into standard Harris cutting attachments (such as the 73-3 or 49-3) and straight torches (such as the 62-5). By choosing this generic replacement, facilities can maintain high operational standards and cut capacity while managing consumable costs effectively.