(高清版)GB∕T 39542.2-2020 技術制圖活動鉛筆 第2部分：黑鉛芯 分類和尺寸

GB/T39542.2—2020/ISO9177-2:1989第2部分：黑鉛芯分類和尺寸(ISO9177-2:1989,Mechanicalpencils—Part2:Blackleads—Classificationanddimensions,IDT)國家市場監(jiān)督管理總局國家標準化管理委員會IGB/T39542.2—2020/ISO9177-2:1989 本部分為GB/T39542的第2部分。本部分使用翻譯法等同采用ISO9177-2:1989《活動鉛筆第2部分：黑鉛芯分類和尺寸》?！狦B/T4457.4—2002機械制圖圖樣畫法圖線(ISO128-24:1999,MOD);——GB/T17450—1998技術制圖圖線(ISO128-20:1996,IDT); GB/T39542.1—2020技術制圖活動鉛筆第1部分：分類、尺寸、性能要求和試驗本部分做了下列編輯性修改：—-表2中增加了一個頁下腳注；公司。1GB/T39542.2—2020/IS rtechnicaldrawings—Part1:Classification,dimensions,perfor3.14分類黑鉛芯應按硬度等級(見表1)、公稱直徑(見第5章)和黑鉛芯的類型(即樹脂鉛芯或石墨鉛芯)2GB/T39542.2—2020/ISO9177-2:1989公稱真徑/mm硬度等級(見3.2)6H,5H,4H,3H,2H,H,FHB,B,2B129H、8H、7H、6H,5H,4H,3H,2H,H,FHB,B,2B,3B,4B,5B,6B5尺寸5.1直徑鉛芯直徑應符合表2規(guī)定。線跡寬度鉛芯直徑公稱直徑實際直徑和公差0.25*—0.35+8020.5+8.050a+0.03-0.0111一0.081-0.12一一222±0.05·目前尚無相應的鉛芯1).通常在活動鉛筆和包裝上可以標志為0.3和0.9。使用者應注意采用新標準化標志的鉛芯完全適用于采用舊標志的活動鉛筆，反之亦然，即0.35和1分別對應0.3和0.9。鉛芯長度應符合表3規(guī)定。GB/T39542.2—2020/ISO9177-2:1989表3長度單位為毫米鉛芯類型公稱直徑長度活動鉛筆的機械結構類型(見ISO9177-1)P或C0.35160±1或90±1或F30±1或45±1S225±1*或L·適用于圓規(guī)使用的長度。6標志b)本部分編號(即GB/T39542.2);c)類型分類字母(即P或C);黑鉛芯GB/T39542.2-P-0.5-60黑鉛芯GB/T39542.2-C-2-130GB/T39542.2—2020/ISO9177-2:1989[1]QB/T1024—2018活動鉛筆用黑鉛芯打印日期：2020年11月27日版權專有侵權必究定價：14.00元Porte-mine—Partie2:Minesgraphite-ClassificationetdimensionsISO9177-2:1989(E)CopyrightIntemafonalOrgarizationforStandardizafionProvidedbyIHSunderlioensewithISONoreproductionornetworkingpermittedwithoutlioensotromIHSISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISOmemberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnicalcommittees.Etherighttoberepresentedonthatcommittee.Internationalorganizations,govern-mentalandnon-governmental,inliaisonwithISO,alsotakecollaboratescloselywiththeInternationalElectrotechnicalCommission(IEC)onallmattersofelectrotechnicalstandardization.DraftInternationalStandardsadoptedbythetechnicalcommitteestheISOCouncil.TheyareapprovedinaccordancewithISOproceduresrequiringatleast75%approvalbythememberbodiesvoting.UsersshouldnotethatallInternationalStandardsundergolatestedition,unlessotherwisestated.Casepostale56·CH-1211Genève20·SwitzerlandCopyrghtIntermationalOrganizafonforStandardizafionProvdedbyIHSundericensewithISONoreproductionornetworungpermittedwithoutlicensefromIHSNotforResaleISO128,Technicaldrawings-Generalprinciplesofpresen-tation.ISO9177-1,Mechanicalpencils-Part1:Classification,dimensions,performancerequirementsandtesting.bon(e.g.graphite)andabindingagent3.2hardnessdegree:Classificationindicatingincreasingtable1),tothenominaldiamofblacklead(i.e.polymerorceramic).Table1-Classificationaccordingtohardnessdegree16H,5H,4H,3H,2H,H,F,HB,B,2B9H,8H,7H,6H,5H,4H,3H,2H,H,F,HB,B,2B,3B,4B,5B,6BTable2-DiametersNominalActualdiameter一0,352)一1一2)Currentpracticeistolabelormarkmechanicalpencilsandboxes1CoprlghtIntemationalOrganizationforStandardizationProvidodbyIHSunderlcensewthINoreproducionornetworkingpermittodwithoutlicensefromIHSISO9177-2:1989(E)Table3-LengthsDimensionsinmilimetresC1FS2L6Designationcomprise,intheordergiven,thefollowingelements:b)thenumberofthispartofISO9177(i.e.ISO9177-2);d)thenominaldiameter,inmillimetres;e)thelength,inmillimetres.Thedesignationshallbeclearlyindicatedonthepackagingand,ifpossible,onthelead1).Designationexamples:lengthof60mmshallbedesignatedasfollows:ISO9177andhavinganominaldiameterof2mmandalengthUDC74