INSIDE-DIAMETER MEASUREMENT DEVICE

摘要

This inside-diameter measurement device (50), which measures the inside diameter of a hollow measurement subject, has a contact measurer (27) and an in/out unit (23) that can move said contact measurer radially in and out. The contact measurer is provided with a rotation unit (1) and a measuring head (2) and can be inserted inside the measurement subject. Said measuring head makes contact with the inside surface of the measurement subject and measures the inside diameter. The rotation unit can rotate the measuring head about the central axis (51) of the inside-diameter measurement device.