A thread gauge is a measuring tool used to inspect the quality characteristics of the thread outer diameter, pitch, thread tooth shape, etc. Its structure is generally composed of two clamp arms, one of which has a thread tooth profile hole, which is used to inspect the protruding part of the workpiece thread. The thread gauge has many different models and sizes according to its specifications and accuracy, which are adapted to different detection needs.
The accuracy indicators of the thread gauge mainly include tooth profile deviation, pitch deviation, outer diameter deviation, etc., and each deviation has a corresponding tolerance requirement. The thread gauge is generally made of high-quality alloy steel with relatively high hardness requirements to ensure service life and accuracy as much as possible. In the structure of this measuring tool, there are a series of measuring holes on the front clamp and a groove on the rear clamp. The pitch, thread outer diameter and other dimensions are detected by adjusting the pliers.
Before using the thread gauge, the front and back sides of the thread gauge must be clearly identified and cleaned. Press the external thread of the workpiece to be measured into the threaded hole of the thread gauge, test the front and back sides once each, and the measurement results should be consistent.
