Общий каталог PRECITOOL - страница 704

MarTest test indicators QPruoicdkucotvienrfvoiremwaftoiorneasy ordering Design features Pointer Clearance compensation spring Dial face sealed with an Mechanism O-ring • shockproof • anti magnetic • movement bearings with with 8 gemstones • automatic adaption to sensing direction, ensures error-free reading Gear segment Dovetail guide way lever Contact point Dovetail guideways with carbide ball Measuring force spring Shock absorber Jewel bearing Double lever supported in ball bearings, overload protection by slip coupling MarTest applications The test indicator serves as an instrument for com- Concentricity test of shafts Concentricity test of sleeves Centring of bores parative measurements. It can be employed in any kind of measuring stand. Due to the swivelling fea- ture of the stylus and the reversal of its sensing di- rection, the Mahr test indicator is suitable for various measuring and inspection tasks. Areas of application are e.g.: • testing of concentricity and run-out of shanks and Aligning of surfaces Testing parallelism bores • testing of parallelism and alignment of surfaces in engineering and tool making For accurate measurements, the axis of the contact point has / = 14.5 mm to be perpendicular to the measuring device (fig. 1).If this is not possible, it is necessary to multiply the reading from the dial with a correction coefficient, which depends on angle α (fig. 2). For angles less than 15° the correction factor is negligible. / = 41.2 mm Angle α 15° 30° 45° 60° Corr. coeff. 0.96 0.87 0.70 0.50 www.precitool.de 32/699