375789 - Tweco Wire Feeder Pressure Arm Shaft

Authentic Tweco Replacement Component

The Tweco 375789 Pressure Arm Rod is a specialized mechanical component designed for the maintenance and repair of compatible wire feeding systems. In the context of Gas Metal Arc Welding (GMAW) and Flux Cored Arc Welding (FCAW), the integrity of the wire drive assembly is critical for process stability. This rod acts as the central pivot or support shaft for the pressure arm mechanism, which is responsible for applying the necessary downward force onto the drive rolls to grip and feed the electrode wire.

Over time, mechanical components within the wire feeder can suffer from wear due to constant friction, vibration, and mechanical stress. A worn pressure arm rod can lead to misalignment of the pressure assembly, resulting in inconsistent clamping force on the wire. This inconsistency often manifests as wire slippage, erratic feed speeds, or "birdnesting" at the drive rolls. Replacing the rod with this genuine OEM part ensures that the dimensional tolerances match the original equipment specifications, restoring the precise geometry required for smooth operation.

Fabricated from durable steel, the 375789 rod is engineered to withstand the rigors of industrial welding environments. It is an essential spare part for maintenance departments and repair technicians servicing Tweco and Thermal Arc wire feeders. Proper installation of this rod helps extend the service life of the entire drive assembly by ensuring that forces are distributed correctly across the drive rolls and gears.

Key Technical Benefits:

• OEM Precision: Manufactured to exact tolerances to fit specific Tweco wire feeder models without modification.


• Mechanical Stability: Provides a rigid axis for the pressure arm, preventing lateral play that causes feed issues.


• Wear Resistance: Hardened surface resists scoring and wear from repetitive mechanical movement.