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203390 - Miller Woodruff Key Replacement Part

Packaging: 1 PER EA
$8.89/EA $5.81/1 PER EA only $5.81/EASave 35%

Usually ships within 3-5 business days

SKU: MIL203390 Categories: ,
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OVERVIEW

Genuine Miller Electric Woodruff Key for Industrial Maintenance

The Miller 203390 Woodruff Key is a critical mechanical component designed for the maintenance and repair of Miller welding equipment. As a genuine OEM part, it is manufactured to exact specifications to ensure seamless compatibility with Miller wire feeders, drive assemblies, and motor shafts. Woodruff keys are semicircular metal keys that fit into a matching slot (keyway) cut into a shaft, leaving a protruding flat tab that locks into a mating component, such as a gear, pulley, or drive roll carrier.

In industrial welding environments, the reliability of wire feed systems is paramount. A worn or sheared key can result in slippage, inconsistent wire feeding, or complete drive failure. This replacement key is crafted from high-strength steel to withstand the torque and shear forces typical in heavy-duty welding operations. Its precise dimensions prevent play between the shaft and the hub, reducing wear on expensive drive components and extending the service life of the machine.

Maintenance professionals rely on genuine Miller parts to maintain the integrity of their equipment. Using the correct Woodruff key ensures that the mechanical timing and power transmission of the welding machine operate as designed. Whether performing a scheduled overhaul or an emergency repair, the Miller 203390 provides the assurance of quality and fit that generic hardware cannot guarantee.

Technical Specifications

  • Part Number: 203390
  • Type: Woodruff Key (Semicircular)
  • Material: Hardened Steel
  • Function: Torque transmission and component locking
  • Compatibility: Select Miller wire drives and motors
Additional Information
Packaging Description:1 Per Ea
Product Type:Woodruff Key
Material:Steel
Application:Shaft Locking, Torque Transmission
Compatible Equipment:Miller Wire Feeders, Welding Drive Assemblies
----- new values below ----
Product Type:Woodruff Key
Material:Steel
Application:Shaft Locking, Torque Transmission
Compatible Equipment:Miller Wire Feeders, Welding Drive Assemblies
Brand:Miller OEM
Packaging Description:1 Per Ea

INCLUDED

  • (1) Woodruff Key

APPLICATIONS

  • Locking drive rolls to motor shafts
  • Securing gears in wire feed assemblies
  • Replacing sheared or lost keys during maintenance
  • General welding machine repair

FAQ

A Woodruff key is a semicircular metal piece used to lock a rotating element, like a gear or drive roll carrier, to a shaft, ensuring they turn together without slipping.

Yes, the Miller 203390 is a genuine OEM replacement part manufactured by Miller Electric.

You should consult your welding machine's owner's manual or parts breakdown diagram to verify the part number 203390 is listed for your specific model.

It is made of high-strength steel designed to withstand the shear forces and torque within the drive assembly.

While generic keys exist, using the OEM part ensures the precise width, height, and curvature required for a tight fit, preventing damage to the shaft or hub.

Keys typically fail due to excessive torque or shock loads which can cause them to shear (break in half), acting as a mechanical fuse to protect more expensive components.

Replacement usually requires partial disassembly of the drive mechanism or motor assembly. It is a straightforward repair for those comfortable with mechanical maintenance.

No, this item is sold as the key only. Gears, shafts, and other assembly components are sold separately.

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