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The 40% - 80% - 10% principle is often used to describe the ideal distribution of life expectancy, performance, and operational efficiency when considering oil seals. Here’s a breakdown of what each percentage signifies

A skeleton oil seal, also known as a metal casing seal or a rubber oil seal with a metal reinforcing ring, consists of an elastomeric material molded around a metal skeleton. This design provides enhanced stability and durability compared to traditional oil seals. The metal skeleton not only supports the seal but also adds structural integrity, allowing it to withstand higher pressures and temperatures.

Signs You Need a Rebuild Kit