Federal-Mogul Powertrain’s scraper rings are available with a comprehensive range of materials, technical designs and running face coatings.
Form Optimized (FO) scraper rings provide maximum protection against oil consumption and blowby.
Semi-inlaid type running faces utilize a sharp lower edge that’s optimal for oil control.
Napier and interrupted Napier designs provide additional options for scraper ring oil control. Oil scraping effect can be increased with the addition of a “step” or twist feature.
Most Federal-Mogul Powertrain scraper rings have a step recessed into the bottom outer face, which assures extremely effective oil scraping and increases the unit pressure. Additionally, the step relief causes a positive twist that, without gas pressure, brings the periphery into bore contact with only the very edge of the step. The volume created by the step is beneficial in allowing large amounts of oil to be stored.
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