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Bearings and Sleeves Lager und Hülsen Roulements et manchons Rodamientos y Manguitos Cuscinetti e manicotti ISN Features/Benefits .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B9- 2 Funktionen/Vorteile Caractéristiques/avantages Características/Ventajas Caratteristiche/vantaggi SN Series Selection/Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B9- 6 Auswahl/Abmessungen Sélection/Dimensions Selección/Medidas Selezione/dimensioni HFO SLEEVOIL Bearings and Sleeves B9-1
ISN SN Series HFO Bearings and Sleeves SLEEVOIL Bearings & Sleeves / Lager & Hülsen / Roulements & manchons / Rodamientos & Manguitos / Supporti & manicotti Load Ratings: Load ratings for Double Row Ball and Roller bearings supplied by DODGE are shown on pages B9-12 through B9-19. These load ratings, in conjunction with the selection instructions shown below, will assist you in selecting the correct bearing for your application. Life: L 10 Life, Hours.—The life which may be expected from at least 90% of a given identical group of bearings operating under identical load, speed and environmental conditions. Bearing calculation: The selection tables on pages B9-6 through B9-11 help you select the bearings. To use these tables : 1. Define the L 10 Life Hours <strong>des</strong>ired. 2. Establish equivalent bearing radial load P = (XFr [Radial load] + YFa [Thrust Load]); for Pure Radial Load Fr = P) 3. Establish RPM Under the RPM column, find the equivalent radial load that equals or is slightly higher than the application radial load for the <strong>des</strong>ired life. The shaft size on the far left will be the minimum shaft size that you can use for your application. If the <strong>des</strong>ired life is different than the values shown on the chart, use the following calculation method: For double row ball bearings: L 10 = (C/P) 3 x (16667/n) ) – Equation #1 For double row spherical roller bearings: L 10 = (C/P) 10/3 x (16667/n) ) – Equation #2 Where: C = dynamic capacity, pages B9-12 through B9-19 P = equivalent radial load – equation #3 or #4 n = RPM To use the above equation you must specify the L 10 life required. Usually not lower than 30,000 hours. Typical values are: Mining fans: 40,000 to 50,000 hours General purpose fans: 30,000 hours Conveyor Pulleys: 50,000 to 100,000 hours Paper machinery: 100,000 hours Rotary furnaces: 30,000 hours You must establish the radial (Fr) and thrust load (Fa) acting on the bearings. The equivalent load, P, used in the above equations is obtained using: P = X 1 x Fr +Y 1 x Fa Equation #3 P = X 2 x Fr +Y 2 x Fa Equation #4 The values of X and Y are taken from the tables on pages B9-12 through B9-19. The use of Equations #3 and #4 to calculate the equivalent radial load depends on the ratio of Fa/Fr. If Fa/Fr is ≤ e then Equation #3 is used. If Fa/Fr is > e then Equation #4 is used. The values for L 10 , P and RPM are substituted into Equation #1 or Equation #2 and the value of C is calculated. The calculated value of C is <strong>com</strong>pared to the C values shown on pages B9-12 through B9-19. The bearing having a C value equal to or greater than the calculated C is a suitable bearing size to select. Compare the application RPM with the maximum RPM permitted for the selected bearing to be sure it is not exceeded. If the speed of the application is higher than the grease limiting speed but lower than the maximum speed allowed with oil lubrication then an SNX type housing must be selected in conjunction with the bearing selected. The SNX housing may be used with static oil lubrication or circulating oil lubrication. If external heat is being introduced into the bearing via shaft or ambient temperature then an oil lubricated HFO should be considered. (Please ask for our <strong>catalogue</strong>.) Tragzahlen: Tragzahlen für zweireihige Kugel- und Rollen<strong>lager</strong>, die von DODGE geliefert werden, finden Sie auf den Seiten B9- 12 - B9-19. Diese Tragzahlen und die untenstehenden Formeln helfen Ihnen bei der Auswahl <strong>des</strong> für Ihre Anwendung korrekten Lagers. Lebensdauer: L 10 Lebensdauer, Std. – Die Lebensdauer, die min<strong>des</strong>tens 90 % einer größeren Anzahl gleicher Lager erreichen oder überschreiten. Lagerberechnung: Die Auswahltabellen auf den Seiten B9-6 - B9-11 erleichtern Ihnen die Auswahl der Lager. Anwendung der Tabellen: 1. Bestimmen Sie die gewünschte Lebensdauer L 10 . 2. Bestimmen Sie die äquivalente Radiallast P (= XFr [Radialbelastung] + YFa [Axialbelastung]; bei reiner Radialbelastung ist Fr = P) 3. Bestimmen Sie die Umdrehungen pro Minute (U/Min.) Suchen Sie in der Tabelle die Radiallast, die gleich oder etwas höher ist als die Radiallast Ihrer Anwendung, und die der ermittelten Drehzahl (U/Min.) bzw. Lagerlebensdauer entspricht. Die Lagereinsätze im linken äußeren Teil der Tabelle sind geeignet für Ihre Anwendung. Falls Sie eine andere Lagerlebensdauer als in der Tabelle gezeigt benötigen, führen Sie eine Lagerberechnung wie folgt durch: Für zweireihige Pendelkugel<strong>lager</strong>: L 10 = (C/P) 3 x (16667/n) ) – Formel 1 Für zweireihige Pendelrollen<strong>lager</strong>: L 10 = (C/P) 10/3 x (16667/n) ) – Formel 2 Wobei: C = dynamische Tragzahl (Seiten B9-12 - B9-19) P = dynamische äquivalente Belastung) – Formel 3 oder Formel 4 B9-2
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KATALOG EINGEBAUTE LAGER CATALOGUE
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MOUNTED Bearings Catalog (Continued
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Ball Bearing E-Z KLEEN SOLIDLUBE Tw
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Part Number Index Notes INDEX-28
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