191191 - Miller 191191 Buna-N O-Ring .312 ID x .070 CS (5-Pack)

Genuine Miller Replacement Seals

The Miller 191191 O-Ring is a critical component designed to maintain the integrity of your welding equipment's internal systems. Sold as a package of five, these O-rings are manufactured to precise Original Equipment Manufacturer (OEM) specifications, ensuring a perfect fit and reliable performance. When dealing with sophisticated welding power sources and accessories, even the smallest seal plays a vital role in overall machine efficiency and safety. Using genuine Miller parts guarantees that the dimensions and material properties match the engineering requirements of your specific machine model.

Material Science and Durability

Constructed from 70 Durometer Buna-N (Nitrile) rubber, these O-rings are engineered for industrial resilience. Buna-N is the standard-bearer for general-purpose sealing applications due to its exceptional resistance to petroleum-based oils, fuels, water, and many hydraulic fluids. The 70 Shore A durometer rating indicates a medium-hard rubber that offers a balanced combination of flexibility for easy installation and stiffness to resist extrusion under pressure. This makes the 191191 O-ring an ideal choice for sealing connections that may be exposed to welding coolants or shielding gases.

Precision Dimensions

Accuracy is paramount in sealing technology. This O-ring features an Inner Diameter (ID) of 0.312 inches and a Cross-Section (CS) thickness of 0.070 inches. These specific measurements are crucial; a generic O-ring with slightly different tolerances could lead to compromised seals, resulting in gas leaks that affect weld quality or coolant leaks that could damage internal electronics. By choosing the Miller 191191, you are investing in the longevity of your equipment and ensuring that maintenance procedures restore your machine to factory standards.

Maintenance Essentials

Routine maintenance often uncovers worn or dried-out seals. Having a 5-pack of these essential O-rings on hand allows maintenance teams to address leaks immediately, minimizing downtime. whether you are servicing a torch connection, a gas solenoid, or a coolant line, these O-rings provide the assurance of a tight, leak-free seal.