Skip to Main Content
Canadian
Canadian owned and operated

376001A - Tweco Wire Feeder Tension Adjustment Knob

Packaging: pack of 1
$9.80/EA $5.87/pack of 1 only $5.87/EASave 40%

Usually ships within 3-5 business days

OVERVIEW

Genuine Tweco Replacement for Wire Drive Assemblies

The Tweco 376001A Pressure Arm Knob is an essential spare part for professional welders utilizing Tweco or Thermal Arc wire feeding equipment. The wire drive mechanism is the heart of any MIG welder, and the pressure arm acts as the regulator for how much force is applied to the welding wire. If this pressure is too loose, the wire slips and the arc stutters; if it is too tight, the wire can deform, flake off shavings, and clog the liner. This specific knob is the interface between the operator and that critical mechanical function.

Designed as a direct OEM replacement, this knob fits the pressure arm assembly on various Tweco-style wire feeders. It is manufactured from high-strength materials capable of holding thread integrity under tension. Often, these knobs are lost during maintenance or damaged by impact in busy fabrication shops. Having a spare 376001A on hand is a smart inventory decision for maintenance departments and independent fabricators alike.

Proper wire tension is often overlooked until it causes a problem. When you install a fresh Tweco 376001A knob, you regain the tactile feedback required to set the "sweet spot" for your specific wire diameter and type. Whether you are running soft aluminum wire that requires delicate pressure or hard steel wire that needs a firmer grip, this knob facilitates the necessary adjustments for defect-free welding.

Technical Importance

  • Arc Stability: Consistent wire speed is directly linked to arc voltage stability; this knob ensures the drive rolls deliver that consistency.
  • Preventing Birdnesting: Correct tension prevents the wire from tangling before it enters the guide tube.
  • Component Longevity: Using the correct part prevents damage to the pressure arm lever itself.

Invest in genuine Tweco parts to ensure the longevity and reliability of your welding assets. The 376001A Pressure Arm Knob is a small part that plays a massive role in your daily welding operations.

Additional Information
Brand:Tweco
Packaging Description:1 Per Ea
Product Type:Pressure Arm Knob
Application:Wire Feeder Tension Adjustment
Compatible Equipment:Tweco Wire Feeders, Thermal Arc Fabricator Series

INCLUDED

  • 1 x Pressure Arm Knob (376001A)

APPLICATIONS

  • MIG Welding (GMAW) wire feeder maintenance
  • Flux-Cored (FCAW) wire drive repair
  • Replacement of stripped or broken tension knobs
  • General maintenance of Tweco/Thermal Arc Fabricator units

FAQ

It adjusts the pressure applied by the pressure arm to the drive rolls, controlling the grip on the welding wire.

If the knob spins without tightening (stripped threads), is cracked, or cannot hold the tension setting during welding, it should be replaced.

No, it is specific to certain Tweco and Thermal Arc wire drive assemblies. Check your machine's parts manual for compatibility.

It is designed for hand-tightening. Using pliers can damage the plastic head or strip the internal threads.

Correct tension prevents wire slippage (too loose) and wire deformation or motor strain (too tight), ensuring a stable arc.

No, this SKU is typically for the knob only. The pressure arm lever is usually sold separately.

It is commonly found on Thermal Arc Fabricator series machines (like the 181i, 211i, 252i) and other equipment using Tweco wire drives.

Yes, this is a genuine Tweco/ESAB replacement part, ensuring proper fit and material quality.