Tweco 1550-1101 Gas Diffuser 1.375 Inch 500A Mig

Product Description

The TWECO 1550-1101 is a standard-duty gas diffuser designed for use with 500 A MIG welding guns. Machined from 145 tellurium copper alloy bar stock, it delivers consistent dimensional stability and reliable electrical conductivity across medium to heavy-duty welding cycles. The diffuser measures 1.375 inches in overall length and features a 7/16 inch-20UNF-2A thread for secure mounting to the conductor tube. Six 0.094 inch gas holes distribute shielding gas evenly around the weld zone. A conduit set screw holds the 1/16 inch conduit liner securely in place during operation. The part number is roll-stamped on the external surface for fast identification in the field. Sold in a pack of 5. Licensed welders and MIG gun service technicians are the primary installers.

This diffuser is rated for welding applications up to 500 amps, making it appropriate for medium to heavy-duty fabrication, structural, and manufacturing environments. It is compatible with the Tweco No. 5 MIG gun series and Eliminator front-end consumable systems. The tellurium copper construction maintains dimensional accuracy under sustained high-amperage heat cycles, reducing tip drift and inconsistent gas coverage over long runs. It suits production environments where consistent arc performance and minimal consumable downtime are priorities.

Key Features

• Rated up to 500 A for medium to heavy-duty MIG welding applications
• Machined from 145 tellurium copper alloy bar stock for consistent dimensional stability
• Six 0.094 inch gas holes for even shielding gas distribution
• 7/16 inch-20UNF-2A thread for secure conductor tube connection
• Conduit set screw accommodates 1/16 inch conduit liner
• Part number roll-stamped on exterior surface for quick field identification

Compatibility

Compatible with the Tweco No. 5 MIG gun series and Eliminator front-end consumable systems for standard-duty welding setups rated up to 500 A.

Installation Notes

Installation is performed by qualified welders or MIG equipment technicians. Disconnect power to the welding system and allow the gun to cool completely before replacing front-end consumables. Thread the diffuser onto the conductor tube by hand first to avoid cross-threading, then snug with appropriate tooling. Verify the conduit liner is fully seated and secured by the set screw before resuming operation.

Technical Specifications

• Overall Length: 1.375 inches
• Thread Size: 7/16 inch-20UNF-2A
• Gas Holes: Six at 0.094 inches each
• Conduit Liner Size: 1/16 inch
• Amperage Rating: 500 A
• Material: 145 Tellurium Copper Alloy
• Weight: 0.06 pounds
• Sold As: Pack of 5

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1550-1101