JB/T 8240-1999 光学仪器用目镜螺纹

JB/T82401999前本标准是对jB/T8240—95(GB10158—88)《光学仪器用目镜螺纹》的修订。修订时,对原标准作了编辑性修改,主要技术内容没有变化。本标准自实施之日起代替JB/T824095本标准由全国光学和光学仪器标准化技术委员会提出并归口。本标准负责起草单位:上海光学仪器研究所本标准于1962年3月首次发布,于1995年第一次修订。中华人民共和国机械行业标准JB/T8240-1999光学仪器用目镜螺纹代替JBOcular screw thread for optical instruments1范本标准规定了光学仪器用目镜螺纹的牙型结构型式直径螺距和线数、基本尺寸。本标准适用于光学仪器用直径为5mm~8mm的单线及多线目镜螺纹。2蝠紋牙型的结构型式2.1螺纹牙型的结构型式(1)按图1和表1的规定。内螺纹外螺纹图1结构型式(1)表1mn螺距/原始三角形原始三角形高度半高牙型高度爆纹接触间隙牙底宽度高度E=0.866PH/2=0.43321=h2=0.350P+zl.2990.6500.39021.7320.8660.722螺纹牙型的结构型式(2)按图2和表2的规定。国家机械工业局1999-08-06批准2000-0101实施705JB/T8240-1999内螺纹外螺纹图2结构型式(2)表2螺匝原始三角形原始三角形高度牙型高度半高牙底宽度Hx-h2-0,350PHI=0.866PH12=0.433P3500.30(1,2)l.0390.519.4200.360l.2990.5250.450注1结构型式(2)适用于对中糈度高的目镜蜾纹。2加圆括号者为非优先选用。3螺纹的直径螺距和线数3.1螺纹的直径、螺距和线数按表3的规定选用32选用时优先釆用第一系列的螺纹直径3-3表3中优先采用螺距1.5mm。3.4在光学零件联接时为提高对中要求,推荐选用螺距1mm。3.5括号内的螺纹直径、螺距和线数尽可能不用。3.6多线螺纹的计算公式P…(1)式中:S—导程,mm螺纹线数;P——螺距,mm3.7标记3.7.1采用结构型式(1)的光学仪器用目镜螺纹,用代号“MA"及“公称直径×导程/线数”表示;“MJA”可简写成“MJ”。JB/T8240199937.2采用结构型式(2)的光学仪器用目镜螺纹,用代号“MJB"及“公称直径×导程/线数”示3.7.3单线螺纹的“线数”可省略。3.7.4当螺纹为左旋时,在螺纹标记之后加“左”字例1:MJ40×6/或MJA40×6/4表示采用结构型式()公称直径为40mm,导程S为6mm,螺距P为1.5mm,线数n为4的左旋光学仪器用日镜螺纹。例2:MJ40×6/4左表示采用结构型式(2)公称直径为40mm,导程S为6mm,螺距P为1.5mm,线数n为4的左旋光学仪器用目镜螺纹。例3:MJ40×1.5或MJA40×!,5表示采用结构型式(1)公称直径为40mm,导程S为1.5mm,螺距P为1.5mm的单线右旋光学仪器用目镜螺纹。表3nAIL公称直径4螺线数第一第眶12「61s12101012124(25系列系列P导程S(26)(11)1.5k(1.5)(15)(12)162}(2)18l8.553(4.5》6(16)707JB/T8240-1999表3(续)mm公称直径第一|第二距12(3)4(5)68|(9)10(1):12|16(18系列系列P导程(18)241.51.53K4.5)612151.511.51.53158)(26.5)1.5(6)271.51.53(1.26)(18)(2)(4)5151.511.53(18)24(30)321.5i1.539121824(27)1.51.5391218}24341.51.53691215(16.5)1824708JB/T8240-1999表3(续)rrlf公称直径d线数第一第二|距2(3)41(5)68(9)10(1)6(18)20(22)24(25)系列系列P导程S1,51.53(4.5)6(20)(5)158!24i(12)371.5{1.539182415391824(12)401,51.534.)691218124(2(4)(12)(20)(24)1,51.539121824L.56(7.58921824(12)(16)131.5391215(16.51824(24)(50)441.51,53(4.5)612)451.51.539|1218246(212)(16)20)709JB/T8240-1999表3(续)nm公称直径d线数距12(3)4(5)68(9)10(1)20(22泰列系列P导程S6824481.51.53(4.5)615(16.51824(2)(2)(10)(12)(16)(241.51.531218241.51.5318248(12)162432(6)(51)2(2)24321048(53)(3)(12)(13.51(1)(4)1151.53(6)(6)9112(13.5)15|1.518|2430(6)8(20)4(44)481(1)1(1)1.51.5369|12151824167U0JB/T8240-1999表3(完)mn公称直径d螺线数n距12(3)4(5)68(9)10(11:216(18)20(22)241(25)系列系列P导程S15632(36)10181.51.533081624|3240651.51.53912l824181,51.53182436701.51.539121518{241.51.5391215824302162432401.51.5391215182408243240(44)48(50781.51.53(4.5)62(424321.51.5328(12)16注:加圆括号者为非优先选用711JB/T824019994螺纹的基本尺寸4.1结构型式(1)螺纹的大径、中径、小径的公称尺寸应符合图1和表4的规定表4m螺纹直径外螺纹外螺纹和内螺纹牙型高度大径小径内螺纹中径大径径h2=H2dd1.53.8504.4750.575(2)3.5004.3005.1003.6000.7504.8505.4756.1004.9500.5750.5759)8508.4759.1007,9500,575(10)8.8509.47510.1008.9500.5751.5(11)9.85010.47511.1001210.850I1.47510.9500.5751412.85013.475l4.10l2.9500.575(15)13.85014.47515.1003.9500.57514.8505.47516.10014,9500.575(2)14.50015.30016.1000).75016.85017.47518.10016.9500.57518.85018.950(2)2018.50019.30020.1018.6000.75019.85020.47521.1000.5752220.85021.47522.10020.9500.5752321,85022,47523.10021.9500.57522.85023.47524.10022.9500.5752523.85024.47523.9502624.85025.47526,10024,9500.575(26.5)25.97526.60025.4500.5752725.85026.47527.10025.9500.57526.85027.47528,10026.9500.57526.50027,30028.10026.60027.85028.47529.10027.9500.57528.85030.10028.9500.5751.53129.854731.10029.9500.57530.85031.4753210030.9500.57712JB/T8240-1999表4(续mmm螺纹直径螺距外螺纹外螺纹和内蝶纹牙型高度大径小径内螺纹中径大径小径h2=H232.17533.1003l.950仆}.71.53432.85033.4734.10032.9500.575.5752)33.50034.30035.10033,600).75034,85035.47536.10034.95分0.57535.8506.47537.10035.9500.57536.85037.4738.10036.95037.8508.4739.103了.9500.5754038.85039,75小0.10038.9530,575(2)38.50039.30049.1038.600.7504139.85040.47F41.1009,9500.5754210.8502.10040.9530.5742.10010.6000).7:01.54341.85042.47513.1G011.950G.57(2)1341.50012.30013.1G011.600们.750l.54442,85043.47544.10012.9.)00.575(2)42.50043.30044.10042.6000.75044.47543.950(213.50044.30045.10043.500.751644.85045.47516.100(2)4644.50045,30046.10044。5000.T504了45.85046.47547.1000.575546.85047.47548.kO0.5752)46.50047.30048.10016.6000.7501.54947.85048.47547.9500.57549.475048.50049.30050.100i8.6000.75(15)(51)49.85050.47551.10048.9505149,50050.3049.600().755.47552.10050.9500.57550.50051,30052.10050.6004.750JB/T8240-1999表4(宄)mm螺纹直径螺距外螺纹外螺纹和内蝶纹牙型高度大径小径内螺纹中径大径小径2.17553.1051.9500.5751.5)(51)52.85053.47554.10052.9500,575(2)54)52.50053.30054,100:52.6000.7501.553.85054.47555,1003.9500.575553.50054.3055.10053.6000.570(56)548505.47556.1054.9501.556.85058.1056.9500.7556.50057.30058.10056.6000.750608.85059.47560.19058.950().57058.50059.3t060.]008.6001.56260.85061.47562.160.950.5756l.30060,60063.85064,47565.10063.9500.5756563.500.30965.10063.600.75666.85067.47568.10066.9506866.50067.30068.10Q66.600500.751.568.85069.17570.10068.9500.5757068.5009.30070.10068,5000.7501,57270.85071.47572.1070.9500.5727(.5001.3000,6000.750l.57573.85074.47575,10073.9500.57527573.50074.30075.10073.6000.75076,95007876.50077.30078,10076.6000.750.578.8509.480.1(078.9518078.56079.3008(.10078.6000.750注:加圆括号者为非优先选用。B/T8240-199942结构型式(2)螺纹的大径、中径、小径的公称尺寸应符合图2和表5的规定表5螺纹直径螺距外螺纹和內螺纹牙型高度大径中径h:==I2d=Dd2,D2d1=D153.89503.60065.6505.300,3595.47587.4756.9501.5(9)8.4757.9500.52511)10.47595011.65011.3000.3511.4751413.47512.950C.52514.A751.51615.4754.9500.525-—(2)15.30(l4.6001817.3001.51817,475l6.9518.517.80019.65019,300门,33019.47518.9500,52219.30018.6000.70020.300(1.35(L.520.47519,0.5252221.6502.300.35022.6500,351.522.47521.950t,5252423.47522,9500.520.324.4752625.65025.3000.35D71JB/T8240-199表5(续)螺纹直径螺距外螺纹和内螺纹分型高度大径中径小径d=Td,,D2625.1600.4201.52726.65426.3000.350(12)26.58026.1600.4201.526.4750.52527.300l,52827,47526.9500.525(2)27.30026.6000.7002928.65028.3000.3501,52928.47527.9500.52529.6500.3501.53029,47528,9500.52530.65030.3004.33029.931,65031.3000.35031.47530,9500.5253332,65032.3001.547531.95033.6501.53433.47532.9500.525(123534.58034.1600.42033.9500.5250.70035.3000.35053635.47534,950},52376.65036.3000.3501.536.47536.9500.32537.6500.3303837.47536.9500.525JB/T8240-1999表5(续)mnl螺纹直径螺距外螺纹和内螺纹牙型高度大径中径小径A,=Ir38.65038.3000,35038.47537.9500).5239.65039.3000.3501.2)4039.58039.1500,4200,2(2)4039.30038.6000.70040,65040.3000,3501.51110.47539.9500.5254241.65041.3000.350420.5254241.3040.6000.7(042.65042.3000.3:501.54312.47511.95012.3011.600C,7Q013.6501,54443.47542.950U.52542.6001454,65044.300C.3501.54544.4750.52543.60014615,65045.3000,3504645.47544.950(2)4645,3044.60O0.7004746.650),3;15.9500.52547.65047.3000,35017.47546,9500.52:(2)4847.3004948.65048.3000,3018.5848.1600,4201.57.95049.65(0.3JB/T8240-1999表5(续)mm螺纹直径距外螺纹和内螺纹牙型高度大径中径小径h, =hd=49.47548.9500.52549.30048.6000.700(51)19.9500.52(2)(51)50.30019.600.7000.9501.3005C.6000.70O(1)(53)52,6500,350(53)52.47551.9500.525(1)53.300(54)53.475).52(54)52.6090.70051.6504.3005554.58054.1600.4205554,30053.6000.70(1)(56)55.65055.3000.350(1.5)(56)(57)56.65们56.3000.350.55857.1750.52585.30056,6006059.65059.3000.3501,59.47558.95059.30058.5000.7006265061,3006261.47560,9500.52561.300(,706564.55(64.3000.35061.47563.9500.5252650.70067,65067.3000.350JB/T8240-1999表5螺纹直径蝶距外螺纹和内螺纹牙型高度大径中径小径h2=1ldeD1.56857.47566.9500.52566.6000.70069,65069,3000.350l.57069.47568.9500.52569.30068.6000.7C07271.6571.3000.35071.3000.7007574.654.300.35074.4750,52574.30073.690(,70077.650O.3501,577,47576,95077,30076,6000,70079.65079.4778,9500.5250注:加圆括号者为非优先选用