14H-45 - Tweco Style 14H-45 Heavy Duty Contact Tip for .045 Wire

Product Overview

The 14H-45 Heavy Duty Contact Tip is a premium replacement consumable designed for industrial MIG welding applications using .045" (1.2mm) wire. Engineered to meet or exceed OEM specifications, this contact tip is part of the widely used 14 Series, specifically the "H" (Heavy Duty) variant, making it suitable for high-amperage welding environments up to 400 Amps. It features a robust copper alloy construction that ensures optimal thermal and electrical conductivity, reducing the risk of burn-back and extending the service life of the consumable.

Technical Specifications & Compatibility

This contact tip is manufactured with a precise 0.054" bore (tolerance held to +/- .003") to provide consistent wire feeding and stable arc characteristics. It utilizes a standard 1/4"-28 thread for easy installation into compatible gas diffusers. The 14H-45 is designed for broad compatibility, fitting Tweco® No. 2, No. 3, and No. 4 MIG guns, as well as Lincoln® Magnum® 250, 300, and 400 series guns. It mates perfectly with 52, 52FN, and 54A gas diffusers, ensuring a secure electrical connection and efficient gas coverage.

Construction & Performance

Machined from high-quality copper alloy tubing, the 14H-45 offers a smooth inside diameter surface that minimizes friction against the welding wire. The heavy-duty wall thickness acts as an effective heat sink, conducting heat away from the arc source to prevent overheating during prolonged welding cycles. Whether used in general fabrication, automotive repair, or heavy equipment manufacturing, this contact tip delivers the reliability and performance required for professional welding operations.

Key Features

• Wire Compatibility: Optimized for .045" solid and flux-cored wires.
• Amperage Rating: Rated for heavy-duty cycles up to 400A.
• Dimensions: 1.47" overall length with a 0.375" outer diameter.
• Identification: Clearly marked with part number and wire diameter for easy inventory management.