D/F Water-Cooled MIG Torches - Direct Mount

Overview

The Water-Cooled Direct Mount Machine Barrel is designed to be mounted directly to the wire feed drive. It may also be remotely mounted for automatic welding applications with optional accessories.

The model NCM has a current capacity 400 amps in argon shielding. These accommodate slip-in current tips fastened by a collet action nut. The wire diameter range with hard wire is .030” through 1/16”, .035” through 1/8” with cored wire, and .035” through 3/32” with aluminum.

The barrel model HTM has a current capacity range of up to 500 amperes. Ratings will be contingent on the combination of current tip and shielding gas to be used. The model HTM employs threaded CuCrZr (copper chromium zirconium) current tips and will accommodate .030” through 1/16” hard wire, .035” through 1/8” cored wire and 3/64” through 3/32” aluminum wire.

The D/F torch is famous for the fact, that if it is chilled properly, the welder can grab the chrome front water-cooled barrel (not the copper gas nozzle/cup) of the torch with their bare hand and it will be cold to the touch seconds after welding. With the proper chiller, this can be done even after a 4 hour arc time. Make certain the cooling water supply is at least the minimum flow rate of 1 gallon per minute (for each inner body), at 40 psi (80 psi maximum) with a 6 gallon reservoir and a recommended 30,000 BTU/hr cooling capacity. Gun ratings are affected by shielding gas used, arc time, cooling time and inlet water temperature. Water outlet temperature should not exceed 27°C (80°F). The torch’s water out & power cable is not cooled until the coolant has gone through the torch and out the water out & power cable. If water is not flowing through the D/F torch for at least 1 minute prior to striking an arc, when you apply the power and water hits the “hot” water/out & power cable, you will generate steam. Steam can damage the torches internals in seconds causing a leak. It can also blow out the torches water/out & power cable. A flow switch can be installed after the return line ensuring that coolant is present at the return line prior to striking an arc. When High-Deposition GMAW, high current density, high amperages, preheat, or extended periods of arc time are used, a refrigerated liquid chiller with a larger reservoir is required. Precise temperature control maintains the cooling at a constant 13°C (55°F) temperature, thus prolonging the life of the welding equipment and more specifically extending the service life of the gas nozzle and current tip. D/F Machine Specialties does not manufacture or sell chillers, we only recommend them. Click here to see our recommended chillers.

Each D/F Machine Specialties welding gun is fully assembled and ready to install. In order to make the installation complete, the code number, wire size, wire feeder make/model (Lincoln wire feeders, Miller wire feeders, Tweco wire feeders, ESAB wire feeders, & EURO Quick Disconnect wire feeders), and inlet (as needed) must be specified when ordering. If special welding tools or accessories other than those listed previously are required, please consult with the factory. Get the right feeder adapter connection to fit your MIG wire feeder.

Features

• Water-Cooled Inner Body & Nozzle
• Small Frontal Area for Hard-to-Reach Locations
• Nozzle Length Extended by Applying One of Three (3) Different-Length Water-Cooled Nozzle Assemblies

Model Explanation

• NCM - Normal Duty, Collet Action (Slip-in Tip), Machine Barrel
• HTM - Heavy Duty, Threaded Tip, Machine Barrel

Model Specifications

Barrel Dimensions

Overview

The NCM-A/HTM-A (Series A) high capacity direct mount barrels are for nonferrous and ferrous welding applications where a higher capacity nozzle is required.

The barrel models NCM-A (slip-in contact tip) and HTM-A (threaded contact tip) have the larger diameter water-cooled nozzle front end (1.445” outside diameter). These models have a current capacity range of up to 500 amperes. They are recommended for higher speeds, longer duty cycles, and larger diameter wire where more gas coverage is needed. The larger front end utilizes gas cups with an inner diameter from 11/16” to 1”.

The D/F torch is famous for the fact, that if it is chilled properly, the welder can grab the chrome front water-cooled barrel (not the copper gas nozzle/cup) of the torch with their bare hand and it will be cold to the touch seconds after welding. With the proper chiller, this can be done even after a 4 hour arc time. Make certain the cooling water supply is at least the minimum flow rate of 1 gallon per minute (for each inner body), at 40 psi (80 psi maximum) with a 6 gallon reservoir and a recommended 30,000 BTU/hr cooling capacity. Gun ratings are affected by shielding gas used, arc time, cooling time and inlet water temperature. Water outlet temperature should not exceed 27°C (80°F). The torch’s water out & power cable is not cooled until the coolant has gone through the torch and out the water out & power cable. If water is not flowing through the D/F torch for at least 1 minute prior to striking an arc, when you apply the power and water hits the “hot” water/out & power cable, you will generate steam. Steam can damage the torches internals in seconds causing a leak. It can also blow out the torches water/out & power cable. A flow switch can be installed after the return line ensuring that coolant is present at the return line prior to striking an arc. When High-Deposition GMAW, high current density, high amperages, preheat, or extended periods of arc time are used, a refrigerated liquid chiller with a larger reservoir is required. Precise temperature control maintains the cooling at a constant 13°C (55°F) temperature, thus prolonging the life of the welding equipment and more specifically extending the service life of the gas nozzle and current tip. D/F Machine Specialties does not manufacture or sell chillers, we only recommend them. Click here to see our recommended chillers.

Each D/F Machine Specialties welding gun is fully assembled and ready to install. In order to make the installation complete, the code number, wire size, wire feeder make/model (Lincoln wire feeders, Miller wire feeders, Tweco wire feeders, ESAB wire feeders, & EURO Quick Disconnect wire feeders), and inlet (as needed) must be specified when ordering. If special welding tools or accessories other than those listed previously are required, please consult with the factory. Get the right feeder adapter connection to fit your MIG wire feeder.

Features

• Water-Cooled Inner Body & Nozzle
• Large Frontal Area for Increased Gas Coverage
• Nozzle Length may be Extended by Applying One of Three (3) Different-Length Water-Cooled Nozzle Assemblies

Model Explanation

• NCM-A - Normal Duty, Collet Action (Slip-in Tip), Machine Barrel - High Capacity (Series A)
• HTM-A - Heavy Duty, Threaded Tip, Machine Barrel - High Capacity (Series A)

Model Specifications

Barrel Dimensions