>> P.284
■호칭번호내륜의호칭번호는형식기호·치수로구성되며배열예는다음과같습니다.형식기호치수LRT202024호칭번호의배열예내륜의형식내륜폭(20mm)내륜외경(24mm)내륜내경(20mm)■정밀도내륜의치수정밀도는표2와같습니다.쉘형니들베어링용내륜은쉘형니들베어링과조합한경우정확한레이디얼내부틈새가되도록제작됩니다.범용내륜은표1.2의조합베어링에적용한경우틈새CN이됩니다.또한LRB,LRBZ…B는144페이지의표4의레이디얼내부틈새가됩니다.틈새CN이외의틈새및0급이외의정밀도인제품을원하시는경우는IKO에문의하십시오.표6LRT,LRTZ의외경허용차(틈새CN일때)d내륜내경mmF내륜외경mm3초과6이하6초과10이하10초과18이하18초과30이하30초과50이하50초과80이하을(를)초과이하상하상하상하상하상하상하─243040506580100120140160180200225250280315355400450243040506580100120140160180200225250280315355400450500-10-27-7-23-4-18+50-4-9-19-500-12-12-11-21-260-10-10표2내륜의정밀도형식내륜의정밀도IRTLRT,LRTZIRBLRBLRBZ…BJIS0급에따름(34페이지표12참조)표3에따름표4에따름비고내륜외경의허용차는표5와같습니다.∆dmp평면내평균내경의치수차∆Bs실측내륜폭의치수차Kia내륜의레이디얼진동상하상하최대00000000101013152000-250-250-250-250-250-13-13-13-13-13d호칭베어링내경mm을(를)초과이하2.5101830501018305080표3IRB의정밀도단위μmd호칭베어링내경mm을(를)초과이하─19.05030.16250.80082.55019.05030.16250.80082.550120.650∆dmp평면내평균내경의치수차∆Bs실측내륜폭의치수차상하상하Kia내륜의레이디얼진동최대00000000101315202500-130-130-130-130-130-10-13-13-15-20표4LRB,LRBZ…B의정밀도단위μm284
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