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161ECB 22240 CCK JA / C3 W3312345Spherical Roller Bearings61. PrefixesECBAir melt carburized steel, innerring onlyBS2Double row spherical rollerbearing with special dimensionsfor seals2. Internal DesignCAOne-piece machined brasscage of the double-prongedtype, retaining flanges on theinner ring and guide ringcentred on the inner ring.CACSame as CA but improvedraceway geometry CAFASame as CA but with amachined steel cage.CCTwo, window-type steel cages,flangeless inner ring and guidering centred on the inner ringEd < 65mm, Two window-typesteel cages, flangeless innerring and guide centred on theinner ring. When d > 65 mm asabove but guide ring centred onthe cagesECAOne-piece machined brasscage of the double-prongedtype, retaining flanges on theinner ring, guide ring centred onthe inner ring and reinforced roller complementECAC As ECA but with improvedraceway geometryECAFAs ECA but with a machinedsteel cage3. Bore types-Cylindrical bore no symbolK1:12 tapered boreK301:30 tapered bore4. Cage Designation/Seals2CSNitrile rubber seals on bothsides, bearing filled withmedium temp. extremepressure grease2CS2* Fluoroelastomer rubber seals on both sides, filled withhi-temp grease*2CS5Hydrogenated Acrylonitrile(HNBR) seals on both sidesfilled with 70-100% of Polyureabased hi-temperature greaseFMachined steel cage, ringguidedJPressed steel cageJAHardened steel cage, ringguidedMAMachined brass cage outer ringguidedM2Machined brass roller guidedcage no guide ring (Vibratingscreens)YPressed brass cage, ringguided5. Clearance/ToleranceC1Clearance < C2C2Clearance < NormalCNNormal (no symbol)C3Clearance > NormalC4Clearance > C3C08Reduce runout on both inner and outer rings to ISO P5 (RBEC 5)VQ 424 Closer tolerances than C086. FeaturesWNo relubrication feature on E sty...