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420.1001.4295 - Fronius Insulation Ring 20.5mm x 12.15mm x 8mm (Pack of 5)

Packaging: pak of 5
$25.81/ea $92.20/pak of 5 only $18.44/eaSave 29%

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OVERVIEW

Keep Your Fronius Torch Running Smoothly

Every welder knows that the smallest parts often cause the biggest headaches if they fail. The insulation ring inside your Fronius MIG gun is one of those unsung heroes. It sits quietly behind the nozzle, making sure the electricity goes into the wire and not into the nozzle itself. If this ring cracks, burns, or gets clogged with spatter, you might start experiencing erratic arcs, or worse, your nozzle becomes electrically hot, leading to shorts when you touch the workpiece.

This 5-pack of genuine Fronius Insulation Rings (20.5mm x 12.15mm x 8mm) is the perfect addition to your maintenance kit. Designed specifically for your Fronius equipment, these rings fit perfectly every time—no jamming or loose rattling. They are built to handle the heat of high-amperage welding, ensuring that your torch stays cool and safe to handle.

Don't let a worn-out insulator ruin your weld or damage your expensive gas nozzles. Check your insulator every time you change your contact tip. If it looks charred or cracked, pop in a new one from this pack. It’s a cheap insurance policy for high-quality welds and a long-lasting torch. Whether you are in a production line or a custom fab shop, keeping these spares on hand ensures you are always ready to burn wire without interruption.

Additional Information
Brand:Fronius
Item:Insulator
Packaging Description:pack of 5
Dimensions:20.5mm OD x 12.15mm ID x 8mm H
Material:High-Temperature Polymer
Part Number:42,0100,1429,5

INCLUDED

  • 5 x Fronius Insulation Rings (20.5/12.15x8mm)

APPLICATIONS

  • Electrical isolation in Fronius MIG/MAG welding torches
  • Prevention of nozzle short-circuits
  • Replacement of worn or damaged torch insulators
  • General maintenance of Fronius welding guns

FAQ

The ring measures 20.5mm in outer diameter, 12.15mm in inner diameter, and 8mm in height.

The internal SKU is FR420.1001.4295, often referenced as 42,0100,1429,5 in Fronius catalogs.

This product is sold as a package containing 5 insulation rings.

The insulation ring prevents electricity from traveling to the gas nozzle. If it is damaged, the nozzle can become electrically live, causing shorts against the workpiece.

No, this is a specific part for Fronius torches. You must verify that your torch model requires an insulator with these specific dimensions (20.5/12.15x8mm).

Yes, this is a genuine Fronius OEM replacement part.

It is made of a high-temperature resistant polymer or ceramic composite designed to withstand welding heat and provide electrical insulation.

Inspect the insulation ring every time you remove the nozzle for cleaning or tip replacement. Replace it if you see cracks or heavy charring.