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âž” fig ).For the connecting rod bearing arrange-ments of combustion engines and com-pressors, SKF has special needle roller andcage assemblies for gudgeon pin bearing ar-rangements ( Other needle roller and cage assembliesThe needle roller and cage assemblies listedin the product tables form only a part of the comprehensive range available from SKF. This not only includes other sizes but also assemblies with cages which differ from the standard cage design, for example split needle roller and cage assemblies, which can be used where raceways are recessed in the shaft ( Dimensions The dimensions of needle roller and cage assemblies with inside diameter up to and including 100 mm, where standardised, conform to ISO 3030:1996. âž” fig )and crankpin bearingarrangements ( âž” fig ). The assemblies forthese applications, where high accelerations occur, have given excellent service in spiteof the difficult operating conditions, includ-ing high temperatures or unfavourable load,movement or lubrication conditions.To special order, SKF also produces spe-cial sizes of needle roller and cage assem-blies, when the quantities required are eco-nomical.Details of these other needle roller andcage assemblies will be sent on request. Tolerances SKF needle roller and cage assemblies eachcontain rollers of one gauge of grade G2(ISO 3096:1996 Grade 2). The tolerance ofeach gauge is 2 µm maximum. The relevant gauge is indicated by a coloured slip en-closed in the package ( âž” Table ). The deviations from the nominal dimensions of the needle rollers are also printed on thepackage.Supplies of needle roller and cage as-semblies may comprise assemblies of anygauge (red, blue, white or grey) unless spe-cific requirements are stated when ordering.Assemblies with rollers of special gauge(green and yellow) are only available to special order.The tolerances for the width U are

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− 0,20/ − 0,80 mm for all assemblies.Paired mounting If needle roller and cage assemblies are tobe mounted immediately adjacent to eachother, they must incorporate rollers of thesame gauge, so that both assemblies carry the load equally.

Needle roller bearings (4703 /IE) - 5564 3

Table 1

Needle roller gaugesGauge typeColourGauge in µm Standard gaugesred 0/ − 2 − 1/ − 3 blue − 2/ − 4 − 3/ − 5 white (grey) − 4/ − 6 − 5/ − 7 Special gaugesgreen − 6/ − 8 − 7/ − 9 (to order)yellow − 8/ − 10 − 9/ − 11

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