ASME B89.1.13 pdf download MICROMETERS
This Standard is intended to provide the essentialrequirements for micrometers as a basis for mutualunderstanding between manufacturers and consumers.Outside，inside，and depth micrometers are describedin the Standard.
backlash:a relative movement between interactingmechanical parts，resulting from looseness [ASMEB5.54M-1992 (R1998)]. In this Standard,backlash isfurther defined as the rotation of the spindle, in theopposite direction of the initial reading,before spindlemoves in a linear direction. This condition is typicallycaused by looseness of fit between the lead screw andadjusting nut.
bias:systematic error of the indication of a measuringinstrument (VIM).
eccentricity: the distance between the geometric centeror axis of the body and its axis of rotation.
end shake: the amount of spindle movement，whenan axial force is applied in the direction of the spindlealternating towards the anvil and away from the anvil,without rotating the spindle.
error (of indication) of a measuring instrument:indi-cation of a measuring instrument minus a true valueof the corresponding quantity (VIM).
NOTE: This concept applies mainly where the instrument is comparedto a reference standard.
flatness:the condition of a surface having all elementsin one plane (ASME Y14.5M-1994).
maximum pernissible error (MPE):extreme valuesof an error permitted by specifications,etc.,for a givenmeasuring instrument (VIM).
parallelism: the condition of a surface or center plane,equidistant at all points from a datum plane or axis,equidistant along its length from one or more datumplanes or a datum axis (ASME Y14.5M-1994).
runout:a composite tolerance used to control thefunctional relationship of one or more features of apart to a datum axis. The types of features controlledby runout tolerances include those surfaces constructedaround a datum axis and those constructed at rightangles to a datum axis (ASME Y14.5M-1994).
side shake: the amount of spindle side movement,when a force is applied perpendicularly to the measuringend of the spindle, alternating from side to side, withoutrotating the spindle.
tolerance: the total amount the specified dimensionis permitted to vary. The tolerance is the differencebetween the maximum and minimum limits (ASMEY14.5M-1994).
This Standard has been coordinated insofar as possiblewith the following standards.
ASME B5.54M-1992 (R1998)，Methods for Perform-ance Evaluation of Computer Numerically ControlledMachine Centers
ASME Y14.5M-1994,Dimensioning and TolerancingPublisher: The American Society of Mechanical Engi-neers (ASME International)，Three Park Avenue,New York,NY 10016
IEEE/ASTM SI 10-1997,Standard for Use of theInternational System of Units (SD): The ModernMetric System Revision and Redesignation of ANSIIEEE Std 268-1992 and ASTM E380
Publisher: Institute of Electrical and Electronics Engi-neers (IEEE),445 Hoes Lane，Piscataway,NJ08854ISO 3611，Micrometers Calipers for External Measure-ments,1978
Publisher: International Organization for Standardization(ISO),1 rue de Varembe，Case Postale 56,CH-1121，Geneve 20，Switzerland/Suisse