Patent ID: 8904662

Claim:
A test device for testing whether a coaxial accuracy between a test hole and a standard hole of an object is qualified or not, the object includes a main body, a standard piece defining the standard hole, and a test piece defining the test hole, the test device comprising: a base to support the object; a fixing member mounted to a first end of the base to fix the main body of the object; a positioning member mounted to a bottom of the a second end of the base opposite to the fixing member, the positioning member comprising a positioning pole to be extended through the standard hole of the object with a top end; and a testing member mounted to a top of the second end of the base opposite to the positioning member; the testing member comprising a testing pin aligning with the positioning pole and slidably relative to the positioning pole, a diameter of the testing pin equaling to a standard diameter of the test hole subtracting a positional tolerance of the test hole, wherein the testing pin is operable of being inserted into the test hole in response to the coaxial accuracy between the test hole and the standard hole being qualified and cannot be operable of being inserted into the test hole in response to the coaxial accuracy between the test hole and the standard hole being unqualified.