>> P.196
CrFwDrRNA49 … UUIdentification numberMass (Ref.)Boundary dimensionsmmShaft dia. 48-85mmShaft dia.mm48With two sealsWith one sealWith two sealsWith one seal RNA 4908UU─RNA 4908U── RNA 6908UU─RNA 6908U50 RNA 49/42UURNA 49/42U──52 RNA 4909UU─RNA 4909U─- RNA 6909UU─RNA 6909U55 RNA 49/48UURNA 49/48U──58 RNA 4910UU─RNA 4910U── RNA 6910UU─RNA 6910U60 RNA 49/52UURNA 49/52U──63 RNA 4911UU─RNA 4911U── RNA 6911UU─RNA 6911U65 RNA 49/58UURNA 49/58U──68 RNA 4912UU─RNA 4912U── RNA 6912UU─RNA 6912U70 RNA 49/62UURNA 49/62U──72 RNA 4913UU─RNA 4913U── RNA 6913UU─RNA 6913U75 RNA 49/68UURNA 49/68U──8085 RNA 4914UU─RNA 4914U── RNA 6914UU─RNA 6914U RNA 4915UU─RNA 4915U── RNA 6915UU─RNA 6915UFwDC(1)rs min484850525255585860636365686870727275808085856262656868707272758080828585889090951001001051052240 0.6 0.622 0.62240 0.6 0.622 0.62240 0.6 0.622 0.62545 1 125 12545 1 125 12545 1 130 130543054 1 1 1 1g150270173197355187177320200265470275285505320325580465495910520960Notes(1)Minimum allowable value of chamfer dimension r (2)Allowable rotational speed applies to grease lubrication.Remarks1.The outer ring has an oil groove and an oil hole.2. earings are provided with prepacked grease. Bearings with a seal on one side are not provided with prepacked grease. Perform proper lubrication for use.D57MACHINED TYPE NEEDLE ROLLER BEARINGSWith Seal, Without Inner Ring
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