The gear pcd runout checking device manufactured by concept engineers is useful for inspection the runout of pitch circle diameters of a gear. This gear pcd runout checking devices is a high precision measuring unit with a repetitive accuracy of less than 0,002 mm. The base, the table, the tailstock and the head are made of close - grained castings. The base of this device has a box structure adequately ribbed for rigidity. The pillar is made of alloy steel and is hardened. The gear to be inspected is mounted on an arbor. The arbor along with gear is in turn mounted between the centre of the device. The tailstock can be moved by loosening the knob. Further adjustments in the device can be carried out using knob 2. The gear can be positioned to the centre of the ball by rotating the knob 3. The head 4 can be moved up or down by rotating handle 5 to preload the dial. When lever 6 is moved, the dial retracts, the gear is indexed and the lever 6 is operated to obtain the reading. The operation is repeated to obtain the total pcd error.Salient features of this product are - the dial can move up or down by 10 mm; the table can be moved in x axis by 100 mm; the head can be moved up and down by 75 mm in z axis and admit between centers is 275 mm.