CK639-2 - Straight Gas Nozzle for Fume Extraction MIG Gun - 400A

Technical Overview: Straight Nozzle SHM 400 MM

The Straight Nozzle SHM 400 MM is a specialized gas nozzle designed for high-performance MIG/MAG welding applications, specifically within the realm of fume extraction systems. Engineered to be compatible with heavy-duty fume extraction torches (such as the Abicor Binzel RAB GRIP series or similar SHM-style configurations), this nozzle features a straight, cylindrical bore rather than the standard conical taper. This geometry is critical for maintaining laminar gas flow in turbulent extraction environments and provides distinct advantages when welding in deep grooves or restricted access areas.

Manufactured from high-grade copper alloy, the nozzle is designed to withstand the intense thermal cycling associated with 400A and 500A welding procedures. The exterior is typically nickel-plated to resist spatter adhesion, a crucial feature for fume extraction guns where spatter buildup can impede both shielding gas flow and fume suction efficiency. The "400 MM" designation in the product name likely refers to the amperage class (400A) or a specific machine torch configuration compatibility, ensuring it meets the duty cycle requirements of industrial fabrication environments.

In automated or semi-automated setups, the straight profile allows for precise positioning without the clearance issues often caused by conical nozzles. It ensures that the contact tip remains properly recessed or flush, depending on the specific insulator configuration, to optimize arc characteristics and gas coverage. This component is an essential consumable for maintaining the integrity of the weld pool while ensuring the effective capture of hazardous fumes at the source.