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FAG-Spindellager erschlieen neue Leistungskln

02/12/2014

2014-12-02 | 000-005-466 DE-DE

SCHAEFFLER AG, SCHWEINFURT

Konsequente Weiterentwicklung der Basisbaureihe um High-Speed-K fig

FAG-Spindellager erschlie en neue Leistungsklassen

Die Spindellager der B-Baureihe bilden die Basis des Spindellager-Programms der Marke FAG und bedienen ein breites Spektrum an Spindelanwendungen. Sie zeichnen sich durch Pr zision, sehr gute Drehzahleigenschaften und eine hohe Tragf higkeit aus. Als Technologief hrer bei Hauptspindellagern hat Schaeffler im Zuge kontinuierlicher Produktverbesserungen die Spindellager der Ma reihen B719 und B70 berarbeitet und optimiert. Neben einer Einschr nkung der Druckwinkeltoleranzen und einer verbesserten Kugelqualit t wurden die Lager mit einem angepassten Dichtungskonzept versehen. Erstmals ist in den B-Spindellagern zudem ein High-Speed-K fig als Standardk fig verbaut.

High-Speed-K fig als neuer Standard

Reduziertes Gewicht und hohe Steifigkeit sind Grundvoraussetzungen f r hohe Drehzahleignung und bestm gliche Beschleunigung eines K figs. Diese Kriterien erf llt der seit mehreren Jahren im Feld erfolgreich erprobte High-Speed-K fig der Spindellager-Baureihe RS (Robust & Schnell), der als neuer Standardk fig nun erstmals auch in den Schr gkugellagerbaureihen B719 und B70 zum Einsatz kommt. Je nach Lagergr e ergeben sich f r diesen K fig 15-20% Gewichtsersparnis, 5-10% Erh hung der Zugfestigkeit und eine Steigerung der Biegefestigkeit von mehr als 20% gegen ber dem bisherigen Standardk fig. Ein neues K figdesign und verbesserte Oberfl chenbeschreibung reduzieren zudem die Lauftemperatur und das Reibmoment messbar: Die Reibleistung ist im oberen Drehzahlbereich um rund 15% geringer. Neben den verbesserten Reibeigenschaften konnte in vergleichenden Versuchen festgestellt werden, dass die K fige nach dem neuen Standard seltener zur Ger uschbildung, dem sogenannten K figrasseln , neigen.

Verbesserte Dichtscheibengeometrie

Ebenso wie das Design des K figs hat Schaeffler das Dichtungsdesign bei abgedichteten Lagern berarbeitet, wodurch die Au enring-Rundheit verbessert werden konnte. Durchmesserabweichungen und Rundheitsfehler werden durch eine radiale Freistellung im relevanten Bereich ausgeglichen. Zudem sind s mtliche Dichtungen in FAG-Spindellagern frei von dem als sch dlich eingestuften Weichmacher DEHP, der ab 2015 durch die europ ische Chemikalienverordnung REACh verboten ist.

Konstante Betriebsbedingungen bei mehrreihigen Anwendungen

Eine konstruktionsbedingte Einschr nkung der Druckwinkelschwankung um 35-50% f hrt zu einer erh hten Gleichm igkeit bei Steifigkeit, Kinematik und Vorspannung. Die damit einhergehende gleichm igere Belastung der Lager f hrt, vor allem bei mehrreihigen Anordnungen, zu gezielten und konstanten Betriebsbedingungen beim Kunden. Verminderte Kugeltoleranzen sorgen au erdem f r eine geringere Ger uschanregung.

Bereits seit Beginn des Jahres folgen erste Lager der Ma reihe B719 dem neuen Standard, der bis Ende 2015 f r alle Spindellager der Ma reihen B719 und B70 gelten wird. Von der Umstellung betroffen sind zun chst alle Lager mit einem Au endurchmesser kleiner 160 mm. Die Ma nahmen stellen keine freigabepflichtigen nderungen der Innenkonstruktion dar und erfolgen ausschlie lich im Rahmen der kontinuierlichen Produktpflege.
LINK: http://www.ina.de/content.ina.de/en/press/press-releases/press-details...
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