>> P.73
1N=0.102kgf=0.2248lbs.1mm=0.03937inch■Lubrication■Oil HoleBearings with prepacked grease are shown in Table For Shell Type Needle Roller Bearings with an oil 6. Lubrication grease (Shell Lubricants Japan K.K. hole, "OH" is appended to the end of the identication Shell Gadus S2 V125J 2 (S)) is prepacked.number.In the case of bearings without prepacked grease, perform proper lubrication for use. If the bearings are ExampleTA 2525 Z OHThe symbol "OH" is not marked on the bearing itself, operated without lubrication, the wear of the roller but is shown on its packaging, etc. When bearings contact surfaces will increase and the bearing life will with multiple oil holes are required, please consult be shortened.IKO.Table 6 Bearings with prepacked grease〇:With prepacked grease×:Without prepacked greaseBearing typeCagedFull complementStandardClosed endWith sealsGrease retainedSeriesMetric series Inch seriesTLA,TLAM,YTL TA,TAM,YTBA,BAM,YBBHA,BHAM,YBH ××××××××■Static Safety FactorSince Shell Type Needle Roller Bearings employ an outer ring made from a thin steel plate which is drawn, carburized and quenched, excessively large loads must be avoided. The required static safety factor is usually more than 3.■Specifications of shaft and housingShell Type Needle Roller Bearings are commonly used without an inner ring. In such cases, the surface hardness of the raceway surface should be 58〜64HRC and the surface roughness should not exceed 0.2μmRa. However, when the operating condition is not severe, a surface roughness 0.8μmRa or less can be used.If the surface hardness is low, the load rating must be corrected by the hardness factor shown on page A20. When the shaft cannot be heat treated and nished by grinding, the use of IKO Inner Rings for Shell Type Needle Roller Bearings (See page H1.) is recom-mended.■MountingShell Type Needle Roller Bearings should be pressed into the housings gently using the appropriate tool as shown in Fig. 1, with their marked end surface up. As the outer ring is thin, it must never be struck directly with a hammer.Since the outer rings of Shell Type Needle Roller Bearings are rmly tted to housing bores with inter-ference, it is unnecessary to x them axially. Fig. 2 shows mounting examples.〇〇〇〇15°〇---D-0.2-0.3-0.025FwFig.1 Example of mounting toolFig.2 Mounting examplesB6
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