Umbra employs the life-design concept and utilizes state-of-the-art materials to ensure that all components are able to withstand the most severe environmental and load conditions encountered in commercial and military aviation applications.
The introduction of Cronidur-30, a high-nitrogen stainless steel, used in combination with Umbra’s revolutionary silicon nitride alternate-ball architecture, has virtually eliminated corrosion and premature wear in Umbra aerospace ballscrews in service today. Before this unique pairing of stainless steel and silicon, conventional chrome-plated aerospace ballscrews used steel loaded balls that were subjected to constant ball-to-ball and ball-to-raceway friction, causing wear that contributed to early failure and replacement. By using silicon nitride balls in combination with Cronidur-30 stainless steel, Umbra ballscrews enjoy an extremely low rate of wear, while simultaneously enabling the electro-mechanical systems they support to sustain very high loads. This unique and highly advantageous combination of extended service life and high loading condition is achieved by combining silicon nitride balls with steel idler balls that preclude friction and reduce wear by eliminating steel-to-steel and ceramic-to-ceramic ball contact.
These advantages have allowed Umbra ballscrews deployed in leading-edge slat, trailing-edge flap, braking system, thrust reverse and horizontal stabilizer applications to achieve “fit and forget” status by eliminating the need for multiple service intervals or complete ballscrew replacement. As a result, Umbra ballscrews make the electro-mechanical systems they support more reliable and robust and reduce total product life cycle costs – a tremendous economic advantage for aircraft owners and operators.
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Francesco Comodo » Send e-mail Tel. +39 335 770 0081 Fax +39 0742 348 269
Justus Breese » Send e-mail Tel. +1 213 407 5953
Nicola Bacelli » Send e-mail Tel. +39 335 770 0074