对于南京INA轴承设计和内径测量标准，务须遵循轴承手册。ForNanjingINAbearingdesignandborediametermeasurementstandard,bearingmanualsmustbefollowed.轴承孔可以通过检查具有内径的外微米上的参考尺寸和通过测量轴承孔的圆度和圆柱度来测量。温度过高的轴承往往会减小轴承的孔径，而且圆度过大，非常不利于轴承的正常运行。如果连杆螺栓的位置松动，连杆轴承盖就会移位，导致轴承孔圆度变差。轴承孔的圆度误差应控制在尺寸公差之内，圆柱度应严格控制。Bearingholescanbemeasuredbycheckingthereferencesizeontheoutermicronwiththeinnerdiameterandbymeasuringtheroundnessandcylindricityofthebearingholes.Hightemperaturebearingstendtoreducetheborediameterofbearings,andtheroundnessistoolarge,veryunf***orabletothenormaloperationofbearings.Ifthepositionoftheconnectingrodboltsisloose,theconnectingrodbearingcapwillshift,causingthebearingholeroundnesstobecomeworse.Theroundnesserrorofbearingholeshouldbecontrolledwithindimensionaltolerance,andcylindricityshouldbestrictlycontrolled.(1)南京INA轴承厚度：外径千分尺的固定平台由平面变为球面，用于测量轴承厚度。轴承厚度应控制在0.005～0.010mm的范围内，否则轴承内径会过大。轴承在开口附近有轻微的变薄，因此测量时应注意。(1)NanjingINABearingThickness:Thefixedplatformofexternalmicrometerchangesfromplanetosphericalsurfaceformeasuringbearingthickness.Bearingthicknessshouldbecontrolledintherangeof0.005~0.010mm,otherwisethebearinginnerdiameterwillbetoolarge.Thebearinghasslightthinningneartheopening,soweshouldpayattentiontoitwhenmeasuring.（2）轴承和南京INA轴承孔紧密配合：通过延伸弹簧和轴承的剩余高度确保密封。在测量残余表面高度的方法下，按照规定装配轴承，将十字轴承盖螺栓固定到规定的扭矩，松开其中一个螺栓并用塞子测量轴承盖接头处的间隙。其数值应在0.05-0.15mm的范围内。(2)BearingandNanjingINAbearingboreclosefit:byextendingtheremainingheightofthespringandbearingtoensuresealing.Underthemethodofmeasuringtheresidualsurfaceheight,thebearingisassembledaccordingtothestipulation,thecrossbearingcoverboltisfixedtotheprescribedtorque,oneoftheboltsisloosenedandtheclearanceatthebearingcoverjointismeasuredwiththeplug.Thevalueshouldbewithintherangeof0.05-0.15mm.(3)轴承内径：在测量前，轴承应按规定进行装配，南京INA轴承盖螺栓应按规定扭矩拧紧。在用孔规校准基准尺寸后，应避免变薄。轴承内径与轴颈外径的差值与间隙相匹配。(3)Bearinginnerdiameter:Beforemeasuring,thebearingshouldbeassembledaccordingtotheregulati***,andtheNanjingINAbearingcoverboltshouldbetightenedaccordingtotheprescribedtorque.Aftercalibratingthereferencesizewithholegauge,thinningshouldbe***oided.Thedifferencebetweentheinnerdiameterofthebearingandtheouterdiameterofthejournalismatchedwiththegap.(4)主轴承孔同轴度：主轴承孔同轴度误差主要由轴承孔同轴度误差引起，轴承孔同轴度误差主要由缸体变形引起。当轴颈半径在规定的公差范围内时，检查轴颈和轴承的进给和关闭标记。如果主轴承进合痕位置明显不同，同轴度误差较大，可以通过刮削、镗削轴承或更换气缸来解决。否则，很难保证发动机的正常运行。(4)coaxialityofmainbearingbore:coaxialityerrorofmainbearingboreismainlycausedbycoaxialityerrorofbearingbore,andcoaxialityerrorofbearingboreismainlycausedbydeformationofcylinderblock.Whenthejournalradiusiswithinthespecifiedtolerancerange,checkthefeedandclosingmarksofthejournalandbearing.Ifthepositionofthemainbearingenteringandclosingmarksis***iouslydifferent,thecoaxialityerrorislarge,whichcanbesolvedbyscraping,boringbearingsorreplacingcylinders.Otherwise,itisdifficulttoensurethenormaloperationoftheengine.从一个低油壳中取出少量油，用手指揉搓，用手指和拇指揉搓。如果南京INA轴承认为石油含有杂质，或不像水一样稠，甚至涩或酸，油就会变质。如果在扭矩磨削后手指上可以看到精细、光滑的金属磨削，这表明发动机的磨损部分更加严重，务须立即更换机油。Removea***allamountofoilfromalowoilshell,rubitwithyourfingers,rubitwithyourfingersandthumb.IfNanjingINAbearingsbelievethatoilcontainsimpurities,ornotasthickaswater,orevenastringentoracid,theoilwilldeteriorate.Iffine,***oothmetalgrindingcanbeseenonthefingeraftertorquegrinding,thisindicatesthatthewornpartoftheengineismoreseriousandtheoilmustbereplacedimmediately.在白纸上混合油（可以是滤纸），形成油点。油点从中点向外延伸约2至3小时，形成三个同心环。根据这三个区域的颜色、宽度和形状，我们可以看到油的状态。Themixtureofoil(filterpaper)onwhitepaperformsanoilpoint.Theoilspotsextendoutwardfromthemidpointforabout2to3hours,formingthreeconcentricrings.Accordingtothecolor,widthandshapeofthethreeregi***,wecanseethestateoftheoil.文章来自：南京SKF轴承www.wh-Thearticleisfrom:NanjingSKFbearingwww.wh-文章来自：南京INA轴承a-Thearticleisfrom:NanjingINAbearinga-文章来自：南京NSK轴承Thearticleisfrom:NanjingNSKbearing***：524085168电话：0510-81207777手机：13311666672)