Concentricity testing device

manualbenchtopprecision

Micron-precise holding and measuring of large rotationally symmetrical workpieces – centreless and between centres Superstructure / Functionality The base of the superstructure is formed by a base plate made of natural hardstone. Two flat and parallel T-guiding and -clamping slots made of steel are brought into the finely ground and lapped top side in longitudinal direction. A pair of gauge block roller boogies is used for the defined centerless bearing of the workpieces to be measured. The roller boogies are adjusted by means of the gauge blocks so that the nominal axis height of the workpieces to be measured does not change - regardless of the workpieces‘ bearing diameter. Equipped with steel tongue-and-groove springs and a air-beared transport system in the base, the roller boogies are moved and positioned by hand in a wear-resistant and user-friendly manner. To avoid an axial displacement of the workpieces to be measured due to rotation, two axial stops, designed as stable steel/welded construction, are provided as counter holders. A pair of tailstocks with base bodies made of special cast iron as well as quills and grooved springs made of hardened steel serve for the defined bearing of the workpieces to be measured between centers. The workpieces to be measured are clamped by manual adjustment of one tailstock quill via handwheel. Like the gauge block roller boogies, the tailstocks are also moved and positioned with an air-beared transport system. An exemplary instrument for carrying out measuring tasks is a measuring stand with adjustable column and fine adjustment, to whose measuring arm a dial gauge or fine indicator is attached.