KP2035-1B1 - Lincoln Electric Short Back Cap for PTA-9/20 TIG Torches

Compact TIG Torch Solution for Restricted Access

The Lincoln Electric KP2035-1B1 Short Back Cap is a specialized TIG welding consumable designed to maximize accessibility in confined work environments. Engineered specifically for the Lincoln Electric PTA-9, PTA-20, and PTW-20 series torches, this component replaces standard long or medium back caps, significantly reducing the overall profile of the torch head. This modification is critical for industrial applications where clearance is minimal, such as complex pipe clusters, internal vessel welding, or automotive exhaust fabrication.

Manufactured to Lincoln Electric's rigorous OEM standards, the KP2035-1B1 is constructed from high-durability phenolic materials capable of withstanding the intense radiant heat generated during the Gas Tungsten Arc Welding (GTAW) process. The cap features precision-molded threads that ensure a secure mechanical connection to the torch body, preventing loosening during operation. Integral to its design is a high-quality O-ring seal, which is essential for maintaining the integrity of the shielding gas coverage. A compromised seal at the back cap can lead to air aspiration (Venturi effect), resulting in porosity and tungsten contamination; the KP2035-1B1 eliminates this risk with a reliable, gas-tight fit.

It is important to note that due to its abbreviated length, this back cap requires the use of shortened tungsten electrodes. Standard length electrodes will not fit within the housing and must be cut down to size. This trade-off allows the welder to manipulate the torch at angles that would otherwise be impossible, ensuring high-quality welds in the most difficult positions. Whether for maintenance, repair, or precision fabrication, the KP2035-1B1 is an indispensable addition to any professional TIG welder's toolkit.

Key Technical Specifications:

• Compatibility: PTA-9 (Air Cooled), PTA-20 (Water Cooled), PTW-20 (Water Cooled)


• Material: Heat-resistant phenolic/plastic composite


• Seal: Integrated O-ring


• Function: Secures collet and tungsten while sealing the torch back end