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Along with these mechanical properties, our customer finds that the lightness and compactness of our lip seals and their ability to prevent dust and pollutants to enter the gearbox and ruin the gears are also major advantages for using our rotary lip seals.

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Our customer trusts our polymer lip seals due to their low coefficient of friction, low wear rate at high rotary speed, high thermal resistance, and ability to run dry if loss of lubrication should occur.

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The main gearbox, also known as a transmission, is a critical part in a helicopter’s airworthiness and safety because it is responsible for reducing high input speed generated from engines and providing appropriate torque to main rotors and other accessory systems.

A number of significant helicopter accidents are caused by a loss of lubrication as friction is increased between components, leading to a mechanical failure of gearbox components.

How would a helicopter main gearbox (MGB) successfully function without the proper sealing solution? Rotary lip seals are widely used to seal the oil lubricant within the gearbox and protect it from leaking out at where the shaft enters and exits the gearbox.