ASME B89.1.6:2002 pdf free download MEASUREMENT OF PLAIN INTERNAL DIAMETERS FOR USE AS MASTER RINGS OR RING GAGES
1 sCOPE
This Standard is intended to establish uniform prac-tices for the measurement of master rings or ring gagesusing horizontal methods.The standard includesrequirements for geometric qualities of master rings orring gages, the important characteristics of the compari-son equipment, environmental conditions,and themeans to assure that measurements are made with anacceptable level of accuracy.
This Standard does not include measurement methodsfor rings below 1 mm (0.040 in.). The measurementmethod on these very small rings should be agreed uponprior to manufacture or calibration between the manu-facturer / laboratory and customer.
DEFINITIONS
bilateral tolerance: application of one half of the tabulatedtolerance plus and minus from the specified size.
circularity (roundness): circularity is a condition of a sur-face of revolution where:
(a) for a cylinder or cone, all points of the surfaceintersected by any plane perpendicular to a commonaxis are equidistant from that axis
b)for a sphere,all points of the surface intersectedby any plane passing through a common center areequidistant from that center
cosine error: the measurement error in the measurementdirection caused by angular misalignment between ameasuring system and the gage or part being measured.cylindricity: cylindricity is a condition of a surface ofrevolution in which all points of the surface are equidis-tant from a common axis.
diameter: the length of a straight line through the centerof a circular cross-section of an object. In the case of acylinder, the line is considered to be perpendicular tothe axis.
dimensional stability: ability of an object (e.g. measuringinstrument or work piece) to maintain its metrologicalcharacteristics with time.
NOTES:
() Where stability with respect to a quantity other than time isconsidered, this should be stated explicitly.
(2Stability may be quantified in several ways, for example: in terms of the time in which a metrological characteristic changesby a stated amount, or in terms of the change in a characteristicover a stated time.
discrimination (threshold): largest change in a stimulusthat produces no detectable change in the response of ameasuring instrument, the change in the stimulus takingplace slowly and monotonically.
elastic deformation: the non-permanent (reversible)change in the size or geometry of a part due to anapplied force.
gage block: a length standard with rectangular,roundor square cross section, having flat, parallel opposinggaging faces.
NOTE: The surface finish of the gaging faces should be such asto allow gages to be wrung together.
Go ring: an internal diameter gage manufactured to thepart tolerance high limit with a unilateral minus toler-ance, therefore accepting the manufactured part whenin size.
index of refraction: for a given wavelength, the ratio ofthe velocity of light in a vacuum to the velocity of lightin a refractive material.
NOTE: As used in this Standard, the material is air.
line contact: the zone of contact between a flat surfaceand a cylinder.
lobing: systematic variations in the radius around a part(measured in the cross section perpendicular to the axis).master ring: an internal diameter standard used to setother gagingequipment. Master rings are manufacturedto a bilateral tolerance.
max. (maximmum) master ring: an internal diameter stan-dard used to set other gaging equipment. Max. masterrings are manufactured to a unilateral Minus toleranceon the part tolerance high limit.
mean master ring: An internal diameter standard usedto set other gaging equipment. Mean master rings aremanufactured to a bilateral tolerance.
measurand: measurement of a well defined physicalquantity.
Example: Diameter of a cylindrical gage at 20°C.
measurement force: the amount of force exerted upon the
ASME B89.1.6:2002 pdf free download
