221 Каталог MAHR 2007 Линейно-угловые средства измерений Измерительный инструмент Стр.7-35

Каталог MAHR 2007 Линейно-угловые средства измерений Стр. 7-35 0221 ENG Lab2u

Millimar. Air Gaging Instruments Air Gages General Technical Data of Air Gages Air gaging is a measuring system that uses airflow and or air pressure to determine the size of measured part. The relationship between air pressure and distance of a restriction (workpiece) to the air escape (jets) can be plotted on a graph (line a). As the distance between jets and work surface increases the pressure decreases and the ratio becomes linear as represented by the straight section "B". This straight portion of the curve can be accurately calibrated and represents the scale of the Dimensionair. Compare its length with "C" on the other curve which is the usable portion of other air gage scales. This longer linear scale gives the Dimensionair its longer usable measuring range. JET DISTANCE LD o LU CL X. o .006 .009 DISTANCE Description Air plug gages are used for testing cylindrical through bores or blind bores. The plug gage bodies are equipped with two opposing measuring jets which record the measured value without contact. This arrangement allows the diameter the diametric roundness and the cylindricity of bores to be calculated using a single jet air plug gage. The diameter is measured immediately after the air plug gage is introduced while the diametric roundness deviation can be tested by rotation around 180 and the cylindricity by movement in a longitudinal direction. The maximum measuring range of the air plug gages is 76 m .003". Air plug gages are furnished in high chrome stainless steel or chrome plated versions and if required with a shut-off valve to conserve air consumption. The air tooling long service life is due in part to hardened measuring jets which are recessed relative to the generated surface of the measuring body and are therefore protected against damage. The standard Mahr Federal air tooling is compatible with the complete line of evaluation units. These include Dimensionair Dimensionair 830 PE 1840 PE and 1841 PE signal sharing column. Air Electric convertors for interfacing to gaging computer systems are also available. Special air gage designs for measuring taper straightness and other applications are available. Contact Mahr Federal.