Surface measuring instruments NSQF LEVEL 4 Unit-3 Session 3
Surface measuring instruments Source: IndiaMart It is used as a measuring device to measure the accuracies in alignment, eccentricity of the parts/components. Dial indicators are also great for checking crankshaft run out, crank end play, shaft thrust, and gear backlash, flywheel face run out, flywheel housing concentricity, valve seat concentricity or piston deck clearance. Dial gauge Source:Mechanical Walkins Source: Learn mechanical "A dial gauge is like a fine watch. It consists of a graduated dial, pointer, plunger and a clamp. It measures the displacement of its plunger on a circular dial by means of a rotating pointer." Source: Technology student It works on the rack and pinion principle. The stem/plunger has rack Teeth. A set of gears engage with the rack. The pointer is connected to a small pinion. The small pinion is independently hinged. i.e. it is not connected to the stem. Source: Dasqua Tools The vertical movement of the stem is transmitted to the p...