The Techniweld 6290-3NX is a high-quality, aftermarket replacement cutting tip designed to be fully compatible with Harris-style oxy-fuel cutting equipment. This specific model is a Size #3 tip, engineered for use with alternative fuel gases such as Propane and Natural Gas. Unlike acetylene tips, which are typically one-piece, the 6290NX series utilizes a two-piece construction consisting of an outer shell and an inner member. This design is critical for alternative fuels, which have a slower flame propagation rate than acetylene; the recess created by the outer shell acts as a combustion chamber to anchor the flame and prevent it from blowing off the tip end during operation.
The Size #3 classification indicates a cutting capacity of approximately 3 inches (75mm) of mild steel. To achieve optimal performance, the recommended oxygen pressure is typically between 45 and 50 PSI, while the fuel gas pressure should be maintained between 5 and 15 PSI. The tip features precision-machined splines on the inner member to ensure consistent gas flow and a stable preheat flame. The outer shell is manufactured from durable copper alloy to withstand high reflected heat, while the inner member is brass, providing a robust seal against the torch head.
This tip is compatible with a wide range of Harris torches, including the popular 62-3, 73-3, and 142 series hand torches, as well as compatible machine torches. The 'Import Econo' designation signifies that this product provides a cost-effective alternative to OEM consumables without sacrificing essential performance characteristics required for industrial cutting applications.
| Additional Information |
|---|
| Packaging Description:1 per each |
| Item:Cutting Tip |
| Fits Which Torch?:All Harris |
| Fuel Gas:Propane |
| Cutting Capacity (in):3-6", 3" |
| Oxygen Setting:20-25psi, 45-50psi |
| Fuel Setting:10-15psi, 5-15psi |
| Tip Size:3 |
| Construction:2-Piece |
| Material:Brass/Copper |
| Series:6290NX |
