6290NX-6 - Harris Style 6290NX Size 6 Propane Cutting Tip

Heavy-Duty Propane Cutting Performance

The 6290NX-6 Cutting Tip is a premium-quality replacement nozzle designed for heavy industrial cutting applications using Propane or Natural Gas. Engineered to be fully compatible with Harris-style torches, this Size 6 tip is built to handle substantial material thicknesses, specifically rated for cutting steel plate ranging from 6 inches to 8 inches (approx. 150mm - 200mm). It is an essential consumable for shipyards, structural steel fabrication, and heavy equipment demolition where deep, clean cuts are required.

Two-Piece Design for Efficiency

Unlike standard acetylene tips, the 6290NX series features a two-piece construction consisting of a brass outer shell and a copper inner member. This design is critical for alternative fuels like propane, which burn at a slower rate than acetylene. The recessed inner tip creates a stable anchor for the preheat flame, preventing it from blowing out during operation and ensuring consistent heat transfer to the workpiece. The separation of materials also aids in heat dissipation, extending the service life of the tip even under high-heat conditions.

Technical Specifications & Maintenance

This tip requires specific pressure settings for optimal performance. Typically, a Size 6 propane tip operates best with an oxygen pressure between 70-90 PSI and a fuel gas pressure of 5-15 PSI. The splined inner member is precision-manufactured to ensure a uniform preheat flame pattern. Maintenance is simplified thanks to the separable design; the inner member can be removed to clean out slag or carbon buildup from the gas passages, ensuring long-term reliability and consistent cut quality.