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W7004940 - Lincoln Electric Burnback Control Potentiometer W7004940

Packaging: pack of 1
$15.95/EA $9.56/pack of 1 only $9.56/EASave 40%

Usually ships within 3-5 business days

OVERVIEW

Restore Your Welder's Performance with the Lincoln W7004940

Is your Lincoln Electric wire feeder acting up at the end of a weld? If you are constantly dealing with the wire sticking to the puddle when you release the trigger, or conversely, the wire burning all the way back and fusing to your contact tip, your burnback control might be the culprit. The burnback setting is essential for a smooth welding experience, and the potentiometer is the physical dial or internal component that lets you fine-tune that setting. When this part fails, you lose control over how your arc terminates.

The Lincoln Electric W7004940 PCB Burnback Potentiometer is the genuine OEM replacement you need to get your machine back to factory standards. Unlike generic electronic parts that might not fit your circuit board correctly or offer the right sensitivity, this part is designed specifically for your Lincoln equipment. It restores the smooth, predictable adjustment you expect, allowing you to dial in the perfect wire stick-out length after every weld.

Why replace your potentiometer?

  • Eliminate Sticking: Stop wasting time grinding wire off your workpiece because the arc cut out too soon.
  • Save Contact Tips: Prevent the costly annoyance of the wire burning back and ruining your copper tips.
  • Smooth Operation: A fresh potentiometer eliminates "dead spots" in the dial, giving you linear and responsive control.

Don't let a small electronic component disrupt your production workflow. Replacing a faulty potentiometer is often a straightforward repair that can significantly improve the usability of your welder. Whether you are maintaining a fleet of machines in a fabrication shop or fixing up your personal rig, using genuine Lincoln Electric parts like the W7004940 ensures reliability and peace of mind. Get your burnback control working correctly again and keep your focus on laying down perfect beads.

Additional Information
Brand:Lincoln Electric
Packaging Description:1 Per Ea
Component Type:Potentiometer
Function:Burnback Control
Part Type:PCB Component

INCLUDED

  • 1 x PCB Burnback Potentiometer Assembly (W7004940)

APPLICATIONS

  • Repair of Lincoln Electric wire feeders
  • Replacement of faulty burnback controls on welding PCBs
  • Maintenance of industrial MIG/FCAW welding systems
  • Restoring arc termination performance in automated or manual welding setups

FAQ

It controls the burnback timing, which is the delay between the wire feed stopping and the welding current turning off.

Symptoms include the inability to adjust burnback, the wire constantly sticking to the weld, or the wire burning back into the tip regardless of the setting.

Yes, the W7004940 is a genuine OEM replacement part from Lincoln Electric.

No, it is specific to certain models and PCB revisions. Please check your machine's parts manual or schematic to confirm compatibility.

Typically, potentiometers are sold as the component assembly itself; knobs are usually sold separately or reused from the old part.

This depends on the specific machine design. Some are board-mounted requiring soldering, while others may have leads and connectors. Consult a qualified technician.

It is not recommended. OEM parts ensure the correct resistance values, taper, and physical fitment for the control board.

If set too low, the wire sticks to the puddle. If set too high, the wire burns back into the contact tip, potentially ruining it.