NA-4 - Welding machine LINCOLN ELECTRIC - Free user manual and instructions
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| Product Type | Wire Feeder/Control for Semiautomatic Welding |
| Brand | Lincoln Electric |
| Model | NA-4 |
| Dimensions (H x W x D) | 15.7 x 10.2 x 18.9 in (399 x 259 x 480 mm) |
| Weight | 35 lb (15.9 kg) |
| Input Power | 115 V AC, 60 Hz, 10 A |
| Wire Feed Speed Range | 50-800 ipm (1.3-20.3 m/min) |
| Wire Diameter Range | 0.023-1/16 in (0.6-1.6 mm) |
| Duty Cycle | 60% at 300 A (100% at 250 A) |
| Welding Processes | GMAW (MIG), FCAW, SAW (with accessories) |
| Control Type | Solid state, closed-loop feedback |
| Drive Rolls | Dual drive, with quick-change |
| Spool Capacity | Up to 60 lb (27 kg) spool |
| Gas Solenoid | Built-in, 115 V AC |
| Burnback Control | Adjustable, digital display |
| Maintenance | Clean drive rolls and feed path regularly; replace worn contact tips and liners |
| Safety Features | Wire inch/purge lockout, overload protection, emergency stop button |
| Spare Parts Available | Yes, via Lincoln Electric dealers (contact tips, drive rolls, circuit boards) |
| Repairability | Modular design with replaceable subassemblies; service manual available |
| Warranty | 1 year parts and labor (standard) |
Frequently Asked Questions - NA-4 LINCOLN ELECTRIC
What is the Lincoln Electric NA-4?
The NA-4 is a compact, solid-state wire feeder designed for semiautomatic welding processes such as GMAW (MIG) and FCAW. It features closed-loop control for consistent wire feed speed and is suitable for industrial and fabrication applications.
What input power does the NA-4 require?
The NA-4 operates on 115 V AC, 60 Hz single-phase power, drawing approximately 10 amps. It is recommended to use a dedicated circuit with proper grounding.
How do I set the wire feed speed on the NA-4?
Wire feed speed is adjusted using the digital control knob on the front panel. Turn the knob while observing the display to set the desired speed in inches per minute (ipm) or meters per minute (m/min).
What wire types and sizes are compatible with the NA-4?
The NA-4 can feed solid steel, stainless steel, aluminum, and flux-cored wires from 0.023 in (0.6 mm) to 1/16 in (1.6 mm) diameter. Use appropriate drive rolls and contact tips for each wire type.
How do I change the drive rolls and wire liner?
To change drive rolls, release the pressure arm and remove the old rolls. Install matching grooved rolls for your wire size. For the liner, unscrew the inlet and outlet guides, slide out the old liner, and insert a new one of correct length and style. Refer to the manual for detailed steps.
Why is the wire not feeding properly?
Common causes include: incorrect drive roll tension, kinked or tangled wire, blocked liner, worn contact tip, or low spool brake tension. Check each component sequentially. Also ensure the wire is properly threaded through the inlet guide and drive rolls.
What is the duty cycle of the NA-4?
The NA-4 has a duty cycle of 60% at 300 A and can operate continuously at 250 A (100% duty cycle). Exceeding these limits may cause thermal overload; the machine will automatically shut down until it cools.
How do I clean and maintain the NA-4?
Regularly clean drive rolls, wire path, and liner using compressed air. Remove dust and metal filings. Lubricate the wire (if using solid steel) with a felt wiper. Check electrical connections for tightness. Replace worn contact tips and liners as needed.
What safety precautions should I follow when using the NA-4?
Always wear appropriate PPE including welding helmet, gloves, and flame-resistant clothing. Ensure proper grounding of the work piece and feeder. Disconnect power before servicing. Use the emergency stop button if needed. Keep the area free of flammable materials.
Where can I find spare parts or a service manual for the NA-4?
Spare parts such as contact tips, drive rolls, and liners are available from Lincoln Electric distributors. The service manual can be downloaded free from notice-facile.com or purchased from Lincoln Electric. Repairs should be performed by qualified personnel.
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USER MANUAL NA-4 LINCOLN ELECTRIC
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Product information
Brand : LINCOLN ELECTRIC
Model : NA-4
Category : Welding machine