形位公差英文
形位公差用语中英文对照
公差/值(tolerance/value）基本尺寸（basic size)偏差(deviation)上/下偏差（upper/lower deviation)配合/间隙配合/过盈配合/过渡配合（fit/clearance fit/interference fit/ transition fits）单/双边公差（unilateral/bilateral tolerance）标准/精度公差（standard/ precision tolerance）基准/特征/点/线/平面/轴线(datum/feature/point/line/ plane/axis）最大/小材料状态(M/LMC=maximum/least material condition)理论正确尺寸（theoretical size )基本尺寸(basic dimension)直径/半径(diameter/radius)直线度(straightness)平面度（flatness）圆度(circularity)圆柱度（cylindricity)线轮廓度（profile of a line）面轮廓度（profile of a surface)定向公差（orientation tolerance）平行度(parallelism）垂直度（perpendicularity）倾斜度（角度）（angularity)位置度(position)对称度（symmetry)同轴度（同心度）(concentricity）圆跳动(circular runout）全跳动(total runout）坐标尺寸（coordinate dimensioning）拔模斜度(draft angle）分型线（parting line)外圆角/内圆角拔模斜度(rounds/fillets draft）肋材和尖角（rib and corner)顶/测/端视图（top/side/ end view）公差/值(tolerance/value) 基本尺寸（basic size)偏差（deviation）上/下偏差（upper/lower deviation)配合/间隙配合/过盈配合/过渡配合(fit/clearance fit/interference fit/ transition fits) 单/双边公差(unilateral/bilateral tolerance)标准/精度公差(standard/ precision tolerance)基准/特征/点/线/平面/轴线(datum/feature/point/line/ plane/axis）最大/小材料状态(M/LMC=maximum/least material condition)理论正确尺寸(theoretical size ）基本尺寸（basic dimension)直径/半径（diameter/radius)直线度(straightness）平面度（flatness)圆度(circularity)圆柱度（cylindricity）线轮廓度（profile of a line）面轮廓度(profile of a surface）定向公差（orientation tolerance）平行度(parallelism)垂直度（perpendicularity)倾斜度(角度) （angularity)位置度（position）对称度（symmetry）同轴度（同心度）(concentricity)圆跳动（circular runout)全跳动(total runout)坐标尺寸（coordinate dimensioning)几何尺寸(geometric dimensioning)拔模斜度（draft angle）分型线(parting line)外圆角/内圆角拔模斜度(rounds/fillets draft)肋材和尖角（rib and corner)顶/测/端视图(top/side/ end view)。
形位公差说明
形位公差符号常用语(中英文双语)形位公差符号常用语(中英文双语)公差/值(tolerance/value)基本尺寸(basic size)偏差(deviation)上/下偏差(upper/lower deviation)配合/间隙配合/过盈配合/过渡配合(fit/clearance fit/interference fit/ transition fits)单/双边公差(unilateral/bilateral tolerance)标准/精度公差(standard/ precision tolerance)基准/特征/点/线/平面/轴线(datum/feature/point/line/ plane/axis)最大/小材料状态(M/LMC=maximum/least material condition)理论正确尺寸(theoretical size )基本尺寸(basic dimension)直径/半径(diameter/radius)直线度(straightness)平面度(flatness)圆度(circularity)圆柱度(cylindricity)线轮廓度(profile of a line)面轮廓度(profile of a surface)定向公差(orientation tolerance)平行度(parallelism)垂直度(perpendicularity)倾斜度(角度) (angularity)位置度(position)对称度(symmetry)同轴度(同心度) (concentricity)圆跳动(circular runout)全跳动(total runout)坐标尺寸(coordinate dimensioning)拔模斜度(draft angle)分型线(parting line)外圆角/内圆角拔模斜度(rounds/fillets draft)肋材和尖角(rib and corner)顶/测/端视图(top/side/ end view)标题] 12. 形位公差符号常用语(中英文双语)公差/值(tolerance/value)基本尺寸(basic size)偏差(deviation)上/下偏差(upper/lower deviation)配合/间隙配合/过盈配合/过渡配合(fit/clearance fit/interference fit/ transition fits)单/双边公差(unilateral/bilateral tolerance)标准/精度公差(standard/ precision tolerance)基准/特征/点/线/平面/轴线(datum/feature/point/line/ plane/axis)最大/小材料状态(M/LMC=maximum/least material condition)理论正确尺寸(theoretical size )基本尺寸(basic dimension)直径/半径(diameter/radius)直线度(straightness)平面度(flatness)圆度(circularity)圆柱度(cylindricity)线轮廓度(profile of a line)面轮廓度(profile of a surface)定向公差(orientation tolerance)平行度(parallelism)垂直度(perpendicularity)字串6倾斜度(角度) (angularity)位置度(position)对称度(symmetry)同轴度(同心度) (concentricity)圆跳动(circular runout)全跳动(total runout)坐标尺寸(coordinate dimensioning)几何尺寸(geometric dimensioning)拔模斜度(draft angle)分型线(parting line)外圆角/内圆角拔模斜度(rounds/fillets draft)肋材和尖角(rib and corner)顶/测/端视图(top/side/ end view)形位公差的代号及标注（1）形位公差的代号国家标准（GBll82—80）规定，在技术图样中，形位公差应采用代号标注，当无法采用代号时，允许在技术说明中用文字说明。
形位公差的定义和符号
形位公差的定义和符号加工后的零件不仅有尺寸误差，构成零件几何特征的点、线、面的实际形状或相互位置与理想几何体规定的形状和相互位置还不可避免地存在差异，这种形状上的差异就是形状误差，而相互位置的差异就是位置误差，统称为形位误差。
xingweigongcha形位公差toleranceofformａndposition包括形状公差和位置公差。
任何零件都是由点、线、面构成的，这些点、线、面称为要素。
机械加工后零件的实际要素相对于理想要素总有误差，包括形状误差和位置误差。
这类误差影响机械产品的功能，设计时应规定相应的公差并按规定的标准符号标注在图样上。
20世纪50年代前后，工业化国家就有形位公差标准。
国际标准化组织（ISO）于1969年公布形位公差标准,1978年推荐了形位公差检测原理和方法。
中国于1980年颁布形状和位置公差标准，其中包括检测规定。
形状公差和位置公差简称为形位公差（1）形状公差：构成零件的几何特征的点，线，面要素之间的实际形状相对与理想形状的允许变动量。
给出形状公差要求的要素称为被测要素。
（2）位置公差：零件上的点，线，面要素的实际位置相对与理想位置的允变动量。
用来确定被测要素位置的要素称为基准要素。
形位公差的研究对象是零件的几何要素,它是构成零件几何特征的点,线,面的统称.其分类及含义如下:（1）理想要素和实际要素具有几何学意义的要素称为理想要素.零件上实际存在的要素称为实际要素,通常都以测得要素代替实际要素.（2）被测要素和基准要素在零件设计图样上给出了形状或（和）位置公差的要素称为被测要素.用来确定被测要素的方向或（和）位置的要素,称为基准要素.（3）单一要素和关联要素给出了形状公差的要素称为单一要素.给出了位置公差的要素称为关联要素.（4）轮廓要素和中心要素由一个或几个表面形成的要素,称为轮廓要素.对称轮廓要素的中心点,中心线,中心面或回转表面的轴线,称为中心要素形状公差有直线度,平面度,圆度和圆柱度.其含义和标注如下:1）直线度2）平面度平面度公差带只有一种,即由两个平行平面组成的区域,该区域的宽度即为要求的公差值.3）圆度在圆度公差的标注中,箭头方向应垂直于轴线或指向圆心.4）圆柱度形位公差的标注应注意以下问题:（1）形位公差内容用框格表示,框格内容自左向右第一格总是形位公差项目符号,第二格为公差数值,第三格以后为基准,即使指引线从框格右端引出也是这样.（2）被测要素为中心要素时,箭头必须和有关的尺寸线对齐.只有当被测要素为单段的轴线或各要素的公共轴线,公共中心平面时,箭头可直接指在轴线或中心线,这样标注很简便,但一定要注意该公共轴线中没有包含非被测要素的轴段在内.（3）被测要素为轮廓要素时,箭头指向一般均垂直于该要素.但对圆度公差,箭头方向必须垂直于轴线.（4）当公差带为圆或圆柱体时,在公差数值前需加注符号"Φ",其公差值为圆或圆柱体的直径.这种情况在被测要素为轴线时才有.同轴度的公差带总是一圆柱体,所以公差值前总是加上符号"Φ";轴线对平面的垂直度,轴线的位置度一般也是采用圆柱体公差带,需在公差值前也加上符号"Φ".（5）对一些附加要求,常在公差数值后加注相应的符号,如（+）符号说明被测要素只许呈腰鼓形外凸,（-）说明被测要素只许呈鞍形内凹,（＞）说明误差只许按符号的小端方向逐渐减小.如形位公差要求遵守最大实体要求时,则需加符号○M.在框格的上,下方可用文字作附加的说明.如对被测要素数量的说明,应写在公差框格的上方;属于解释性说明（包括对测量方法的要求）应写在公差框格的下方.例如:在离轴端300mm处;在a,b范围内等.形位公差是为了满足产品功能要求而对工件要素在形状和位置方面所提出的几何精度要求。
形位公差用语中英文对照
公差/值(tolerance/value)基本尺寸(basic size)偏差(deviation)上/下偏差(upper/lower deviation)配合/间隙配合/过盈配合/过渡配合(fit/clearance fit/interference fit/ transition fits) 单/双边公差(unilateral/bilateral tolerance)标准/精度公差(standard/ precision tolerance)基准/特征/点/线/平面/轴线(datum/feature/point/line/ plane/axis)最大/小材料状态(M/LMC=maximum/least material condition)理论正确尺寸(theoretical size )基本尺寸(basic dimension)直径/半径(diameter/radius)直线度(straightness)平面度(flatness)圆度(circularity)圆柱度(cylindricity)线轮廓度(profile of a line)面轮廓度(profile of a surface)定向公差(orientation tolerance)平行度(parallelism)垂直度(perpendicularity)倾斜度(角度) (angularity)位置度(position)对称度(symmetry)同轴度(同心度) (concentricity)圆跳动(circular runout)全跳动(total runout)坐标尺寸(coordinate dimensioning)拔模斜度(draft angle)分型线(parting line)外圆角/内圆角拔模斜度(rounds/fillets draft) 肋材和尖角(rib and corner)顶/测/端视图(top/side/ end view)公差/值(tolerance/value)2基本尺寸(basic size)偏差(deviation)上/下偏差(upper/lower deviation)配合/间隙配合/过盈配合/过渡配合(fit/clearance fit/interference fit/ transition fits) 单/双边公差(unilateral/bilateral tolerance)标准/精度公差(standard/ precision tolerance)基准/特征/点/线/平面/轴线(datum/feature/point/line/ plane/axis)最大/小材料状态(M/LMC=maximum/least material condition)理论正确尺寸(theoretical size )基本尺寸(basic dimension)直径/半径(diameter/radius)直线度(straightness)平面度(flatness)圆度(circularity)圆柱度(cylindricity)线轮廓度(profile of a line)面轮廓度(profile of a surface)定向公差(orientation tolerance)平行度(parallelism)垂直度(perpendicularity)倾斜度(角度) (angularity)位置度(position)对称度(symmetry)同轴度(同心度) (concentricity)圆跳动(circular runout)全跳动(total runout)坐标尺寸(coordinate dimensioning)几何尺寸(geometric dimensioning)拔模斜度(draft angle)分型线(parting line)外圆角/内圆角拔模斜度(rounds/fillets draft) 肋材和尖角(rib and corner)顶/测/端视图(top/side/ end view)22。
形状位置公差及英文翻译
形状位置公差及英文翻译
零件在加工过程中，由于机床－夹具－刀具系统存在几何误差，以及加工中出现受力变形、热变形、振动和磨损等影响，使被加工零件的几何要素不可避免地产生误差。
这些误差包括尺寸偏差、形状误差(包括宏观几何误差、波度和表面粗糙度)及位置误差。
形状公差
形状公差是指单一实际要素的形状所允许的变动全量。
形状公差用形状公差带表达。
形状公差带包括公差带形状、方向、位置和大小等四要
素。
形状公差项目有：直线度、平面度、圆度、圆柱度、线轮廓度、面轮廓度等6项。
位置公差
位置公差是指关联实际要素的位置对基准所允许的变动全量。
∙定向公差
定向公差是指关联实际要素对基准在方向上允许的变动全量。
这类公差包括平行度、
垂直度、倾斜度3项。
∙定位公差
定位公差是关联实际要素对基准在位置上允许的变动全量。
这类公差包括同轴度、对
称度、位置度3项。
∙跳动公差
跳动公差是以特定的检测方式为依据而给定的公差项目。
跳动公差可分为圆跳动与全
跳动。
零件的形位公差共14项，其中形状公差6个，位置公差8个，列于下表。
英汉对译。
中英文公差对照
尺寸公差： Dimensional tolerance
公差=上偏差-下偏差
Tolerance =upper deviation -ower deviation 误差error
形位公差： Shape and position tolerance
形状公差: 直线度 straightness
平面度flatness
圆度 roundness
水平度
level surface
圆柱度 cylindrical shape cylinder
线轮廓度line shape
面轮廓度surface shape
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• ■ i - B 1 * ? S 号
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2形位公差：考舉概念！ （4分） 购
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位置公差: 平行度parallelism
垂直度verticality
倾斜度inclination
同轴度coaxiality
对称度symmetry
位置度
圆跳动
全跳动
端面全跳动overall axial run-out 径面全跳动overall radial run-out
surface roughness
从表面指向实体内point from the surface to the entity
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形位公差的定义和符号
形位公差的定义和符号加工后的零件不仅有尺寸误差，构成零件几何特征的点、线、面的实际形状或相互位置与理想几何体规定的形状和相互位置还不可避免地存在差异，这种形状上的差异就是形状误差，而相互位置的差异就是位置误差，统称为形位误差。
xingweigongcha形位公差toleranceofformａndposition包括形状公差和位置公差。
任何零件都是由点、线、面构成的，这些点、线、面称为要素。
机械加工后零件的实际要素相对于理想要素总有误差，包括形状误差和位置误差。
这类误差影响机械产品的功能，设计时应规定相应的公差并按规定的标准符号标注在图样上。
20世纪50年代前后，工业化国家就有形位公差标准。
国际标准化组织（ISO）于1969年公布形位公差标准,1978年推荐了形位公差检测原理和方法。
中国于1980年颁布形状和位置公差标准，其中包括检测规定。
形状公差和位置公差简称为形位公差（1）形状公差：构成零件的几何特征的点，线，面要素之间的实际形状相对与理想形状的允许变动量。
给出形状公差要求的要素称为被测要素。
（2）位置公差：零件上的点，线，面要素的实际位置相对与理想位置的允变动量。
用来确定被测要素位置的要素称为基准要素。
形位公差的研究对象是零件的几何要素,它是构成零件几何特征的点,线,面的统称.其分类及含义如下:（1）理想要素和实际要素具有几何学意义的要素称为理想要素.零件上实际存在的要素称为实际要素,通常都以测得要素代替实际要素.（2）被测要素和基准要素在零件设计图样上给出了形状或（和）位置公差的要素称为被测要素.用来确定被测要素的方向或（和）位置的要素,称为基准要素.（3）单一要素和关联要素给出了形状公差的要素称为单一要素.给出了位置公差的要素称为关联要素.（4）轮廓要素和中心要素由一个或几个表面形成的要素,称为轮廓要素.对称轮廓要素的中心点,中心线,中心面或回转表面的轴线,称为中心要素形状公差有直线度,平面度,圆度和圆柱度.其含义和标注如下:1）直线度2）平面度平面度公差带只有一种,即由两个平行平面组成的区域,该区域的宽度即为要求的公差值.3）圆度在圆度公差的标注中,箭头方向应垂直于轴线或指向圆心.4）圆柱度形位公差的标注应注意以下问题:（1）形位公差内容用框格表示,框格内容自左向右第一格总是形位公差项目符号,第二格为公差数值,第三格以后为基准,即使指引线从框格右端引出也是这样.（2）被测要素为中心要素时,箭头必须和有关的尺寸线对齐.只有当被测要素为单段的轴线或各要素的公共轴线,公共中心平面时,箭头可直接指在轴线或中心线,这样标注很简便,但一定要注意该公共轴线中没有包含非被测要素的轴段在内.（3）被测要素为轮廓要素时,箭头指向一般均垂直于该要素.但对圆度公差,箭头方向必须垂直于轴线.（4）当公差带为圆或圆柱体时,在公差数值前需加注符号"Φ",其公差值为圆或圆柱体的直径.这种情况在被测要素为轴线时才有.同轴度的公差带总是一圆柱体,所以公差值前总是加上符号"Φ";轴线对平面的垂直度,轴线的位置度一般也是采用圆柱体公差带,需在公差值前也加上符号"Φ".（5）对一些附加要求,常在公差数值后加注相应的符号,如（+）符号说明被测要素只许呈腰鼓形外凸,（-）说明被测要素只许呈鞍形内凹,（＞）说明误差只许按符号的小端方向逐渐减小.如形位公差要求遵守最大实体要求时,则需加符号○M.在框格的上,下方可用文字作附加的说明.如对被测要素数量的说明,应写在公差框格的上方;属于解释性说明（包括对测量方法的要求）应写在公差框格的下方.例如:在离轴端300mm处;在a,b范围内等.形位公差是为了满足产品功能要求而对工件要素在形状和位置方面所提出的几何精度要求。
形位公差量具中英文对照
w
countersink
x
depth
y
conical taper
z
slope (flat taper)
`
plus/minus
~
degree
^
arc length
Rough
AMG DT
a b c e f g h I j d k l n o r p t m u v w x y z ` ~ ^
中文名称
倾斜度 垂直度 平面度
English name
电子称 塞尺 专用量具 X-探伤仪 光谱仪 轮廓度仪 数显卡尺 气动量仪 三坐标 螺紋塞规 目視 电子高度尺 针规 深度卡尺 R规 拉力测试机 块规 百分表 千分表 千分尺 膜厚仪 硬度計 2D投影仪 万能角度尺 扭力扳手 推拉力计 平台
Balance Thickness gage
DIR
MR OTG HB ME APR TS PPM PF
本项目使用检测设备/检具
序号 中文名稱 English name
1
电子称
Balance
2 X-探伤仪
X-ray
3 数显卡尺
Caliper
4 螺紋塞规 Thread gage
5 深度卡尺 Depth caliper
6
目視
Vision
缩写
BE X-ray
Dial indicator
Micrometer Oil's thickness gage
Hardometer microscope Angle protractor Torque spanner Push - Pull meter Platform
缩写
BE TG SG X-ray SR PM CR AG CMM TG Vis HG PG DC RG UTM BK
形位公差用语中英文对照
公差/值(tolerance/value)基本尺寸(basic size)偏差(deviation)上/下偏差(upper/lower deviation)配合/间隙配合/过盈配合/过渡配合(fit/clearance fit/interference fit/ transition fits) 单/双边公差(unilateral/bilateral tolerance)标准/精度公差(standard/ precision tolerance)基准/特征/点/线/平面/轴线(datum/feature/point/line/ plane/axis)最大/小材料状态(M/LMC=maximum/least material condition)理论正确尺寸(theoretical size )基本尺寸(basic dimension)直径/半径(diameter/radius)直线度(straightness)平面度(flatness)圆度(circularity)圆柱度(cylindricity)线轮廓度(profile of a line)面轮廓度(profile of a surface)定向公差(orientation tolerance)平行度(parallelism)垂直度(perpendicularity)倾斜度(角度) (angularity)位置度(position)对称度(symmetry)同轴度(同心度) (concentricity)圆跳动(circular runout)全跳动(total runout)坐标尺寸(coordinate dimensioning)拔模斜度(draft angle)分型线(parting line) 外圆角/内圆角拔模斜度(rounds/fillets draft)肋材和尖角(rib and corner)顶/测/端视图(top/side/ end view)公差/值(tolerance/value)基本尺寸(basic size)偏差(deviation)上/下偏差(upper/lower deviation)配合/间隙配合/过盈配合/过渡配合(fit/clearance fit/interference fit/ transition fits) 单/双边公差(unilateral/bilateral tolerance)标准/精度公差(standard/ precision tolerance)基准/特征/点/线/平面/轴线(datum/feature/point/line/ plane/axis)最大/小材料状态(M/LMC=maximum/least material condition)理论正确尺寸(theoretical size )基本尺寸(basic dimension)直径/半径(diameter/radius)直线度(straightness)平面度(flatness)圆度(circularity)圆柱度(cylindricity)线轮廓度(profile of a line)面轮廓度(profile of a surface)定向公差(orientation tolerance)平行度(parallelism)垂直度(perpendicularity)倾斜度(角度) (angularity)位置度(position)对称度(symmetry)同轴度(同心度) (concentricity)圆跳动(circular runout)全跳动(total runout)坐标尺寸(coordinate dimensioning)几何尺寸(geometric dimensioning) 拔模斜度(draft angle)分型线(parting line) 外圆角/内圆角拔模斜度(rounds/fillets draft) 肋材和尖角(rib and corner)顶/测/端视图(top/side/ end view)。
形位公差中英文对照
形位公差中英文对照设计手册——形位公差符号对应英语Straightness直线度- a condition where an element of a surface or an axis is a straight line.Flatness平面度- is the condition of a surface having all elements in one plane.Roundness圆度- describes the condition on a surface of revolution (cylinder, cone, sphere) where all points of the surface intersected by any plane.Cylindricity圆柱度- describes a condition of a surface of revolution in which all points of a surface are equidistant from a common axis.Profile of a Line线轮廓度- is the condition permitting a uniform amount of profile variation, ether unilaterally or bilaterally, along a line element of a feature.Profile of a Surface面轮廓度 - is the condition permitting a uniform amount of profile variation, ether unilaterally or bilaterally, on a surface. All Around Symbol全周符号 - indicating that a tolerance applies to surfaces all around the part.Angularity倾斜度- is the condition of a surface, axis, or centerplane, which is at a specified angle from a datum plane or axis. Perpendicularity垂直度 - is the condition of a surface, axis, or line, which is 90 deg. From a datum plane or a datum axis.Parallelism平行度- is the condition of a surface, line, or axis, which is equidistant at all points from a datum plane or axis.Position Tolerance位置度 - defines a zone within which the axis or center plane of a feature is permitted to vary from true (theoretically exact) position.Concentricity同轴度 - describes a condition in which two or more features , in any combination, have a common axis.Symmetry对称度- is a condition in which a feature (or features) is symmetrically disposed about the center plane of a datum feature. Runout圆跳动- is the composite deviation from the desired form of a part surface of revolution through on full rotation (360 deg) of the part on a datum axis.Total Runout全跳动 - is the simultaneous composite control of all elements of a surface at all circular and profile measuring positions as the part is rotated through 360.Maximum Material Condition (MMC) 最大实体要求- is that condition of a part feature wherein it contains the maximum amount ofmaterial within the stated limits of size. That is: minimum hole size and maximum shaft size.Least Material Condition (LMC)最小实体要求- implies that condition of a part feature of size wherein it contains the least (minimum) amount of material, examples, largest hole size and smallest shaft size. It isopposite to maximum material condition.Regardless Of Feature Size (RFS) - the condition where the tolerance of form, runout or location must be met irrespective of where the feature lies within its size tolerance.Projected T olerance Zone延伸公差带- applies to a hole in which a pin, stud, screw, etc., is to be inserted. It controls the perpendicularity of the hole to the extent of the projection from the hole and as it relates to the mating part clearance. The projected tolerance zone extends above the surface of the part to the functional length of the pin, stud, and screw relative to its assembly with the mating part.Tangent Plane相切面- indicating a tangent plane is shown. The symbol is placed in the feature control frame following the stated tolerance.Free State Variations自由状态变形 - is a term used to describe distortion of a part after removal of forces applied during manufacture. Diameter直径- indicates a circular feature when used on the field of a drawing or indicates that the tolerance is diametrical when used in a feature control frame.Basic Dimension基本尺寸 - used to describe the exact size, profile, orientation or location of a feature. A basic dimension is always associated with a feature control frame or datum target. (Theoretically exact dimension in ISO)Reference Dimension参考尺寸- a dimension usually without tolerance,used for information purposes only. It does not govern production or inspection operations. (Auxiliary dimension in ISO) Datum Feature参考特征- is the actual component feature used to establish a datum.Dimension Origin尺寸源- Signifies that the dimension originates from the plane established by the shorter surface and dimensional limits apply to the other surface.Feature Control Frame公差控制框- is a rectangular box containing the geometric characteristics symbol, and the form, runout or location tolerance. If necessary, datum references and modifiers applicable to the feature or the datums are also contained in the box.Conical Taper - is used to indicate taper for conical tapers. This symbol is always shown with the vertical leg to the left.Slope坡度- is used to indicate slope for flat tapers. This symbol is always shown with the vertical leg to the left.Counterbore/Spotface沉孔- is used to indicate a counterbore or a spotface. The symbol precedes the dimension of the counterbore or spotface, with no spaceCountersink埋头孔 - is used to indicate a countersink. The symbol precedes the dimensions of the countersink with no space.Depth/Deep深度- is used to indicate that a dimension applies to thedepth of a feature. This symbol precedes the depth value with no space in between.Square - is used to indicate that a single dimension applies to a square shape. The symbol precedes the dimension with no space between. Number of Places位置数量- the X is used along with a value to indicate the number of times a dimension or feature is repeated on the drawing.Arc Length弧长- indicating that a dimension is an arc length measured on a curved outline. The symbol is placed above the dimension.Radius半径- creates a zone defined by two arcs (the minimum and maximum radii). The part surface must lie within this zone.Spherical Radius球半径 - precedes the value of a dimension or tolerance.Spherical Diameter球直径- shall precede the tolerance value where the specified tolerance value represents spherical zone. Also, a positional tolerance may be used to control the location of a spherical feature relative to other features of a part. The symbol for spherical diameter precedes the size dimension of the feature and the positional tolerance value, to indicate a spherical tolerance zone.Controlled Radius可控半径 - creates a tolerance zone defined by two arcs (the minimum and maximum radii) that are tangent to the adjacent surfaces. Where a controlled radius is specified, the part contour within the crescent-shaped tolerance zone must be a fair curve without flats orreversals. Additionally, radii taken at all points on the part contour shall neither be smaller than the specified minimum limit nor larger than the maximum limit.Between - to indicate that a profile tolerance applies to several contiguous features, letters may designate where the profile tolerance begins and ends. These letters are referenced using the between symbol (since 1994) or the word between on drawings made to earlier versions of the Standard.Statistical Tolerance统计公差- is the assigning of tolerances to related components of an assembly on the basis of sound statistics (such as the assembly tolerance is equal to the square root of the sum of the squares of the individual tolerances). By applying statistical tolerancing, tolerances of individual components may be increased or clearances between mating parts may be reduced. The increased tolerance or improved fit may reduce manufacturing cost or improve the product's performance, but shall only be employed where the appropriate statistical process control will be used. Therefore, consideration should be given to specifying the required Cp and /or Cpk or other process performance indices。