JBT8825.2-1998惠氏螺纹丝锥螺纹公差

ICS2510050J41JB/T882521998惠氏螺纹丝锥螺纹公差MANUFACTURINGTOLERANCESONTHETHREADEDPORTIONFORWHITWORTHTHREADSTAPS19981229发布19990701实施国家机械工业局发布I前言本标准参照英国标准BS94921979丝锥规范（第二部分）统一螺纹的丝锥中相关部分制订。螺纹尺寸极限偏差按BS949的有关规定，对个别有错误的尺寸进行了修改。半角偏差参照我国国家标准GB/T9681994丝锥螺纹公差制订。本标准于1998年12月29日首次发布。本标准的附录A是提示的附录。本标准由全国刀具标准化技术委员会提出并归口。本标准主要起草单位上海刃具厂。JB/T882521998111范围本标准规定了惠氏螺纹丝锥（以下简称丝锥）螺纹牙型和尺寸的极限偏差。本标准适用于加工惠氏螺纹的丝锥。2丝锥螺纹牙型和尺寸极限偏差丝锥螺纹牙型按图1所示，尺寸极限偏差在表1、表2中给出（丝锥大径上偏差，小径上、下偏差由制造厂自行规定）。注D（D）大径（公称直径）；D1（D1）小径；ES中径上偏差；JS大径下偏差；D2（D2）中径；2DT中径公差；EM中径下偏差。图1国家机械工业局19981229批准中华人民共和国机械行业标准惠氏螺纹丝锥螺纹公差MANUFACTURINGTOLERANCESONTHETHREADEDPORTIONFORWHITWORTHTHREADSTAPSJB/T88252199819990701实施JB/T8825219981表1大径DMM中径D2MM每254MM上螺距偏差MM半角偏差2下偏差（）下偏差（）上偏差（）螺纹代号每254MM上牙数螺距PMM基本尺寸（）2级磨3级磨切基本尺寸（）2级磨3级磨切2级磨3级磨切2级、3级磨切2级、3级磨切1/840BSW40063531750032005100322769001600350016003500540057353/1624BSW241058476200410063004140840021004300210043006500701/420BSW20127063500045006900455537002300470023004700710077505/1618BSW181411793800480074004870330024005000240050007600843/816BSW16158895250051007900518509002500530025005300800090257/1614BSW141814111120054008300549952002700560027005600850096451/212BSW1270000891134400590059009001039/1612BSW12211714288005900910059129310029006100290061009201065/811BSW15875009414397006400640096011211/1611BSW11230917462006100950061159840031006500310065009801153/410BSW1025401905000640099006417424003200670032006701010120407/89BSW92822222250068010500682041900340071003400710107012918BSW831752540000720110007223368003600740036007401120137208117BSW2857501172625100780078011701464117BSW7362931750007701180077294260038007900380079012001522116BSW6423338100008301270083353900041008500410085012801664315BSW5508044450009101370091411960045009100450091013701812214BSW4556445080000960144009647186004800960048009601440195001100761535JB/T8825219981表1完大径DMM中径D2MM每254MM上螺距偏差MM半角偏差2下偏差（）下偏差（）上偏差（）螺纹代号每254MM上牙螺距PMM基本尺寸（）2级磨3级磨切基本尺寸（）2级磨3级磨切2级磨3级磨切2级、3级磨切2级、3级磨切4124BSW5715001525308301010101015102082124BSW463506350001020154010259433005101030051010301550219432213BSW6985001636520201080108016102313213BSW21372577620001090164010971552005401090054010901640240413413BSW825500170775460113011301690252213413BSW413781588900011301710113838960056011400560114017202614333BSW92250017689830011801180178027343BSW384671016001170178011796180005901200059012001800282001100761535表2大径DMM中径D2MM每254MM上螺距偏差MM半角偏差2下偏差（）下偏差（）上偏差（）螺纹代号每254MM螺距PMM基本尺寸2级磨3级磨切基本尺寸2级磨3级磨切2级磨3级磨切2级、3级磨切2级、3级磨切3/1632BSF32079447620036005800364254001800400018004100620067307/3228BSF280907555600380061003849760019004200190042006500711/426BSF63500064572500440044006800749/3226BSF26097771440040006500406518002000450020004500700077001100762550JB/T8825219981JB/T8825219981表2续大径DMM中径D2MM每254MM上螺距偏差MM半角偏差2下偏差（）下偏差（）上偏差（）螺纹代号每254MM上牙螺距PMM基本尺寸（）2级磨3级磨切基本尺寸（）2级磨3级磨切2级磨3级磨切2级、3级磨切2级、3级磨切5/1622BSF221154793700430069004371980022004800220048007400823/820BSF20127095250045007300458712002300510023005100780088507/1618BSF18141111112004800770048102080024005300240053008200931/216BSF1270000811168400550055008600999/1616BSF1615881428800510083005113271002500570025005700880102255/814BSF15875008714714006000600092010811/1614BSF1418141746200540088005416302002700610027006100940111453/412BSF19050009417693006400640098011713/1612BSF12211720637005900950059192810029006500290065010001217/811BSF1123092222500610098006120747003100680031006801040126110BSF1025402540000640102006423774003200700032007001080133408119BSF2857501082676900740074011301424119BSF9282231750006801090068299440034007500340075011601488318BSF3492501143289300780078012101562118BSF3810001163606800800080012301618518BSF83175412750072011700723924300360081003600810126016720354317BSF44450012342126008400840130017427BSF736295080000770125007748476003800860038008601340185001100761530JB/T8825219981表2完大径DMM中径D2MM每254MM上螺距偏差MM半角偏差2下偏差（）下偏差（）上偏差（）螺纹代号每254MM上牙数螺距PMM基本尺寸（）2级磨3级磨切基本尺寸（）2级磨3级磨切2级磨3级磨切2级、3级磨切2级、3级磨切4126BSF5715001335444000910091014101982126BSF6350001356079000930093014502094326BSF64233698500083013700836714000410095004100950148021835BSF7620001467294601000100015502314135BSF550808255000910148009179297004501020045010201580241213214BSF889000154852860106010601640253433214BSF9525001559163601070107016702624214BSF4556441016000960157009697986004801090048010901690271001100761525JB/T8825219986附录AA1丝锥中