The Weldcraft 18-7 Back Cap Insulator is a critical component for maintaining the performance and safety of your TIG welding setup. Designed to fit the widely used 3 Series torches—including the 17, 18, and 26 models—this insulator serves a dual purpose. Primarily, it provides electrical isolation between the charged torch body and the back cap, preventing potential shocks and ensuring that the welding current is directed entirely to the tungsten electrode. Secondly, it acts as a sealing gasket, ensuring that shielding gas does not escape through the back of the torch, which is vital for maintaining proper gas coverage and weld quality.
Manufactured to strict tolerances, the 18-7 insulator is compatible with a broad range of torch brands, including Miller Weldcraft, CK Worldwide, Lincoln Electric, and Profax. This versatility makes it a staple inventory item for fabrication shops that utilize multiple torch configurations. The component is crafted from high-temperature resistant polymers capable of withstanding the radiant heat generated during heavy-duty welding applications without warping or becoming brittle prematurely.
Regular inspection of your torch's insulator is recommended. A cracked or damaged insulator can lead to high-frequency leakage, which manifests as erratic arc starting or wandering arcs. Furthermore, a compromised seal can introduce atmospheric contamination into the shielding gas stream, resulting in porosity in the weld deposit. This package contains two (2) insulators, allowing for immediate replacement and providing a spare for future maintenance needs. Whether you are setting up a new torch or refurbishing an existing one, the Weldcraft 18-7 ensures OEM-level fit and function.
Compatibility Reference:
| Additional Information |
|---|
| Brand:Weldcraft |
| Item:Insulator |
| Packaging Description:2 PER EA |
| Used To Weld:Steel or Stainless or Aluminum |
| Compatible Series:3 Series, 17 Series, 18 Series, 26 Series |
| Material:Heat-Resistant Polymer |
| Part Number:18-7 |
