iwelding_icon
D/F Machine Specialties on Facebook D/F Machine Specialties on MySpace D/F Machine Specialties on Twitter D/F Machine Specialties on Flickr D/F Machine Specialties on Youtube D/F Machine Specialties on Google+ D/F Machine Specialties on LinkedIn Track Your UPS Package
You Are Here:  Home > Products > Semi-Automatic MIG Guns > Water-Cooled MIG Pistol
D/F Water-Cooled MIG Pistol Grip Gun Model NC-21/HT-21
printer_friendly

D/F Water-Cooled Semi-Automatic MIG Hand-Held Pistol Grip Gun Model NC-21/HT-21 - Push MIG Gun

With more than 44 years of aluminum and steel trailer welding, D/F Machine Specialties Water-Cooled Semi Automatic MIG Pistol Grip Gun Model NC-21/HT-21 has been push welding aluminum trailers.

The D/F water-cooled MIG semi-automatic pistol grip gun offers a design with complete interchangeability of nozzle lengths for manual MIG welding of aluminum and stainless steel, using .030" through 1/8" diameter wire. The torch may be adapted to spot or continuous fusion welding, and is ideal for welding with 3/64" and 1/16" AL & SS wire.

MODEL EXPLANATION
NC-21 - Normal Duty Pistol, Water-Cooled Collet Action (Slip-in Current Tip)
HT-21 - Heavy Duty Pistol, Water-Cooled Threaded Current Tip
NC-21-A - Normal Duty, W/C Collet Action (Slip-In Tip) - High Capacity (Series A)
HT-21-A - Heavy Duty, W/C Threaded Tip (CuCrZr) - High Capacity (Series A)

FEATURES

  • Water-Cooled Inner Body & Nozzle
  • NC-21S - Optional Directly Cooled Spot Nozzle
  • Small Frontal Area for Hard-to-Reach Locations
  • Nozzle Length may be Extended by Applying Either of Three (3) Different-Length Water-Cooled Nozzle Assemblies
  • Standard and Quick-Disconnect Utilities Available
  • Optional Curved Nozzle Kit
NC-21/HT-21 SPECIFICATIONS
Current Capacity  
  NC-21 Series 400 amp
  HT-21 Series 500 amp
GUN DIMENSIONS
Length  
  Overall Length w/ 3" Nozzle 9.250"
  Overall Length w/ 4" Nozzle 10.250"
  Overall Length w/ 5" Nozzle 11.250"
Diameter of Body Housing 1.625"
Recommended Wire Diameter Range  
  NC-21 Series  .030"-1/8" Hard/Cored
3/64"-3/32" AL
  HT-21 Series .030"-1/8" Hard/Cored
3/64"-3/32" AL
Weight (approx., w/out services) 2.5 lbs.
Cooling Required 5 pints/minute
 
Optional Curved Nozzle Kit #13925
Click for More InformationClick for More Information



*Optional High Capacity A4”
W/C Nozzle (1.445” O.D.)
Gas Nozzle I.D. 11/16”-1”

ORDERING INFORMATION - For Hard/Cored Wires (Slip-In Tips 1/4" & 5/16")
Description Code No.
Model NC-21 (Slip-In Tip) 10 Ft. Casing 12 Ft. Casing 15 Ft. Casing
  Short 3" Water-Cooled Nozzle
11231 11236 11251
  Inter. 4" Water-Cooled Nozzle
11233 11237 11252
  Long 5" Water-Cooled Nozzle
11234 11238 11253

ORDERING INFORMATION - For Hard/Cored Wires (Threaded Tips 1/4" & 5/16")
Description Code No.
Model HT-21 (Threaded Tip)
10 Ft. Casing 12 Ft. Casing 15 Ft. Casing
  Short 3" Water-Cooled Nozzle 11261 11266 11271
  Inter. 4" Water-Cooled Nozzle 11262 11267 11272
  Long 5" Water-Cooled Nozzle 11263 11268 11273

ORDERING INFORMATION - For Aluminum Wires (Slip-In Tips 1/4" & 5/16")
Description Code No.
Model NC-21 (Slip-In Tip) 10 Ft. Casing 12 Ft. Casing 15 Ft. Casing
  Inter. 4" Water-Cooled Nozzle
11286 11287 11288
 *High Capacity Inter. A4”
  Water-Cooled Nozzle
11305 11306 11307

Remember the great Linde ST-5 torch (part no. 46V34) that was used exclusively for gas metal arc (MIG) spot welding of aluminum and hard wires? Very similar in design to the Linde ST-5 and ESAB ST-21 (part no. 995950) but with improvements and new features, and proven to be a superior replacement alternative, the D/F water-cooled handheld pistol grip MIG push gun is a rugged all purpose, water-cooled, manual MIG welding torch designed to operate at welding currents up to 600 amperes continuous duty using all types of shielding gases. The torch utilizes a pistol grip design for convenient start-stop welding control and easy handling, and its in-line type construction allows all service lines to enter through the torch barrel. The DF Pistol is intended for use with all wire feeders that have provision for water cooling and will handle all types of welding wire from .035" diameter through 1/8" diameter flux cored wire, and 3/64" AL through 3/32" Aluminum wire.

To provide maximum resistance to the abuses of day to day service, the pistol grip torch is of heavy duty construction with all metal parts well insulated from current carrying members. The in-line body and pistol grip handle allow the D/F Pistol to be used in a variety of applications with easy maneuverability and comfortable operation. To facilitate maneuverability, all service lines are internally connected to the torch body and exit from the rear of the torch barrel. The torch can use either threaded contact tips or slip-in contact tubes which are secured with a collet nut supplied with the torch. The contact tip can be quickly and easily replaced by unscrewing the metal nozzle and collet nut, and removing the tip. Six water-cooled metal nozzles with different lengths and different I.D./O.D. are available for use with the D/F Pistol for continuous fusion welding and for spot welding applications. The water-cooling requirements for the D/F Pistol are described below.

Each D/F gun is fully assembled and ready to install. In order to make the installation complete, the code number, wire size, 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.

Comparing Push Guns, Push-Pull Guns, and Spool Guns

Push Gun Benefits
Feeding aluminum wire through a push only system is very advantageous. The D/F Pistol is inexpensive unlike the push-pull MIG torches and spool guns on the market today. Push-pull torches are also very fragile, difficult to maintain, and have more parts. A push gun requires u-groove drive rolls to provide more surface contact with the wire, a nylon liner, and adequate drive-roll pressure. With the use of the D/F steel reinforced casing supporting the liner, the D/F Pistol Gun can push 3/64", 1/16", and 3/32" aluminum wire up to 15 feet. Because the D/F Pistol Gun can hook up to any manufacturer's wire feeder and power source, large spools of wire can be used reducing expenses, down time, and wear and tear on the torch by the changing of spools, as in a spool gun. A spool gun needs to have the roll changed after every pound of wire is used, compared with the 8 or 15 lb spool on a push-pull system. In tight spaces, the spool may limit access, requiring the operator to use a longer stickout. If the operator is using several pounds of aluminum per day, the few minutes need to change spools can add up. Also, the chance of burnback exists when the end of a spool is reached, so many operators stop when a few turns are left on the spool.

Spool Gun Limitations
Because a spool gun is larger than a push gun, it can sometimes be difficult to get close access to the weld. Also, a spool gun can only hold a 1 pound spool of aluminum wire electrode, so changeovers are frequent. In addition, these small spools typically are not the most economical way to purchase wire.

Push-Pull Gun Limitations
Typically, the greatest disadvantage of a push-pull system is that it requires the most number of components and is the most expensive. Push-pull guns are also very fragile and do not last as long.

Push Welding vs. Push-Pull Welding
A push gun also has advantages over a push-pull gun for many reasons. Typically, the greatest disadvantage of moving wire over long distances with a push-pull system is that it requires the most number of components and is the most expensive. It is very easy to mount a D/F Pistol Gun on a boom system to take all of the weight off of the gun. By mounting the wire feeder and power source on a 4-wheel cart, you can now travel great distances very easily. Push-pull guns are also very fragile and do not last as long (months vs. years). Push-pull guns are 2-3 times more expensive than the D/F Pistol. They only last up to 9 months on average, and you either have to replace the torch or rebuild by installing a new motor costing as much as $400-plus. Lastly but most importantly, because the D/F Pistol uses a 4" contact tip that is recessed in the water-cooling, not only is the arc stability increased, the tip life is increased 7-1, and there is built-in wire straightening. If the operator is using several pounds of aluminum per day, the few minutes need to change spools or replace motors can add up.

Pushing Aluminum Wire
Feeding aluminum wire through a push only system is very advantageous. Because push-only guns like D/F Pistol Gun can hook up to any manufacturer's wire feeder and power source, large 300 lb spools of wire can be used reducing expenses, down time, and wear and tear on the torch by the changing of spools as in a spool gun. A spool gun needs to have the roll changed after every pound of wire is used, compared to the large size spools used in a D/F Pistol Gun. Also, the chance of burn-back exists when the end of a spool is reached, so many operators stop when a few turns are left on the spool.

Trailer Manufacturing
When manufacturing high quality aluminum trailers, it is important to consider longevity and strength of the weld joints. With aluminum in particular, it is somewhat of a fine-tune process to get a weld that will penetrate correctly with slightly higher heat and slightly lower travel speed. Also, choosing the correct wire size is crucial to an optimally strong aluminum weld. Since the D/F Water-Cooled Pistol Gun can handle a wide range of wires, and can hook up to any power source and wire feeder to accept any necessary welding parameters, it is a superior choice for manual MIG aluminum welding and trailer manufacturing.

 
Home | Products | Where To Buy | Services | Links | Downloads | About | Contact Us
Location | Privacy Policy | Terms of Use | Sitemap
D/F® is the registered trademark of D/F Machine Specialties, Inc. D/F Machine Specialties, Inc. is not affiliated with Lincoln Electric®, Miller Welding®, ESAB®, Linde®, Tweco®, Thermal Arc®, Profax®, American Torch Tip®, Superior Consumables®, Fanuc Robotics®, Thermadyne®, ABB®, Hobart®, Kuka®, Mavrix®, American Weldquip®, Bernard®, Binzel®, Dinse®, Fronius®, M.K. Products®, Tregaskiss®, Motoman®, OTC Daihen®, Panasonic®, Welding Alloys®, Pandjiris®, Bug-O Systems®, and other MIG & TIG welding manufacturers. Those manufacturers mentioned are for reference only and are the registered trademarks of their respective companies.
iwelding_icon
Sign Up for Our FREE Newsletter!
D/F Machine Specialties on FacebookD/F Machine Specialties on MySpaceD/F Machine Specialties on TwitterD/F Machine Specialties on FlickrD/F Machine Specialties on YoutubeD/F Machine Specialties on Google+D/F Machine Specialties on LinkedIn
Follow D/F
Copyright © D/F Machine Specialties, Inc.
2008-2013. All Rights Reserved.