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

GB/T39542.2—2020/ISO9177-2:1989第2部分：黑鉛芯分類(lèi)和尺寸(ISO9177-2:1989,Mechanicalpencils—Part2:Blackleads—Classificationanddimensions,IDT)國(guó)家市場(chǎng)監(jiān)督管理總局國(guó)家標(biāo)準(zhǔn)化管理委員會(huì)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(dòng)鉛筆第2部分：黑鉛芯分類(lèi)和尺寸》?！狦B/T4457.4—2002機(jī)械制圖圖樣畫(huà)法圖線(ISO128-24:1999,MOD);——GB/T17450—1998技術(shù)制圖圖線(ISO128-20:1996,IDT); GB/T39542.1—2020技術(shù)制圖活動(dòng)鉛筆第1部分：分類(lèi)、尺寸、性能要求和試驗(yàn)本部分做了下列編輯性修改：—-表2中增加了一個(gè)頁(yè)下腳注；公司。1GB/T39542.2—2020/IS rtechnicaldrawings—Part1:Classification,dimensions,perfor3.14分類(lèi)黑鉛芯應(yīng)按硬度等級(jí)(見(jiàn)表1)、公稱直徑(見(jiàn)第5章)和黑鉛芯的類(lèi)型(即樹(shù)脂鉛芯或石墨鉛芯)2GB/T39542.2—2020/ISO9177-2:1989公稱真徑/mm硬度等級(jí)(見(jiàn)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(yīng)符合表2規(guī)定。線跡寬度鉛芯直徑公稱直徑實(shí)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(wú)相應(yīng)的鉛芯1).通常在活動(dòng)鉛筆和包裝上可以標(biāo)志為0.3和0.9。使用者應(yīng)注意采用新標(biāo)準(zhǔn)化標(biāo)志的鉛芯完全適用于采用舊標(biāo)志的活動(dòng)鉛筆，反之亦然，即0.35和1分別對(duì)應(yīng)0.3和0.9。鉛芯長(zhǎng)度應(yīng)符合表3規(guī)定。GB/T39542.2—2020/ISO9177-2:1989表3長(zhǎng)度單位為毫米鉛芯類(lèi)型公稱直徑長(zhǎng)度活動(dòng)鉛筆的機(jī)械結(jié)構(gòu)類(lèi)型(見(jiàn)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(zhǎng)度。6標(biāo)志b)本部分編號(hào)(即GB/T39542.2);c)類(lèi)型分類(lèi)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(dòng)鉛筆用黑鉛芯打印日期：2020年11月27日版權(quán)專有侵權(quán)必究定價(jià)：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