407191-002 - 115V Wire Feed Motor Carbon Brush Assembly with Spring

Reliable Motor Maintenance for Wire Feeders

The Tweco 407191-002 Wire Feed Motor Brush Assembly is a critical maintenance component designed for specific 115V wire feed motors found in industrial welding equipment. As a consumable part of the electric motor, carbon brushes conduct current between stationary wires and moving parts, specifically the rotating armature. Over time, friction causes these brushes to wear down, which can lead to poor electrical contact, reduced motor torque, and erratic wire feeding speeds.

This assembly is a complete replacement unit consisting of the carbon brush block, the attached lead for electrical connection, and the compression spring. The spring is calibrated to apply the exact amount of pressure required to maintain solid contact with the commutator without causing excessive wear. Using genuine OEM parts like the 407191-002 ensures that the material composition of the brush matches the hardness of the motor's commutator, preventing damage to the expensive motor core.

Regular inspection of motor brushes is recommended for high-volume welding operations. If the wire feeder begins to hesitate, loses power, or if excessive sparking is observed inside the motor housing, it is often a sign that the brushes have reached their wear limit. Replacing them with this high-quality assembly restores the motor's efficiency and reliability, ensuring that production downtime is minimized.