>> P.185
호칭번호와사양의세부사항1표ST시리즈의형식과크기형상밀봉씰형식4568101216202530354045505560708090100크기범용개방형ST○○○○○○○○○○○○○○○○○○○○밀봉형ST…UU---○○○○○○○○○○○○○○○○○중(重)하중용개방형ST…B---○○○○○○○○○○○○○○○○○밀봉형ST…UUB---------○○○○○○○○○○○정밀도외통외경은스냅링의장력에의해변형되므로식(1)로측정점을산출하여3표외통길이의허용차단위μm그점의평균직경치를사용합니다.W=4+L1/8..............................................................................................(1)여기서W:단면에서측정점P까지의거리mm(그림1참조)L1:외통의길이mm내접원경Fw의호칭치수mm외통길이L1의치수차을(를)초과─2060이하2060100상000하-200-300-400L1PW스냅링그림1속도의허용치2표내접원경및외통외경의허용차단위μm내접원경Fw또는외통외경D의호칭치수mm을(를)초과이하36101830508012061018305080120150내접원경Fw의치수차외통외경Dm(1)의치수차상+18+22+27+33+41+49+58─하+10+13+16+20+25+30+36─상─0000000하─-8-8-9-11-13-15-18주(1)Dm은외통외경의2점측정으로얻어진최대직경과최소직경의산술평균치입니다.ST시리즈는회전및왕복직선운동이가능하지만각각의운동을동시에수행할때의속도허용치는식(2)에서구하며,일반적인값이표4에나와있습니다.DN≧Dpwn+10Sn1.............................................................................(2)여기서DN:속도의허용치(표4참조)n:회전속도min-1n1S:스트로크길이mm:분당왕복횟수min-1DpwFw:볼세트피치경mm(Dpw≒1.15Fw):내접원경mm단,n1≦5000,Sn1≦50000일때적용할수있습니다.4표속도의허용치윤활조건오일윤활그리스윤활DN6000003000002-177
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