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Examination item - The design of framework oil seals is a testament to precision engineering. Typically composed of materials such as rubber, silicone, or polytetrafluoroethylene (PTFE), they are crafted to fit seamlessly within the confines of a machine's architecture. Their installation requires meticulous attention to detail, as even a minor misalignment can compromise their performance.
Multiple materials and compounds are used to make oil seals. Some of the oldest materials still used today include felt and leather compounds. However, the trend in mass production has experienced a shift towards synthetic elastomers or rubber.
- When it comes to the type of plug, there are two main categories conventional spark plugs and performance spark plugs. Conventional spark plugs are designed for everyday driving and are relatively inexpensive, while performance spark plugs are designed for high-performance vehicles and can be much more expensive.