What does using a center gage during setup for external threading operations verify?

What does using a center gage during setup for external threading operations verify?

• A. Threading tool location and angle are accurate
• B. Spindle speed is correct
• C. Workpiece length is measured
• D. Tool material is suitable

Answer: (A)

The main idea is making sure the threading tool is positioned on the workpiece’s centerline and oriented at the correct approach angle. A center gage is used to verify that the tool tip sits on the axis of the part and that the tool’s cutting edge is aligned so the thread is formed with the proper geometry. If the tool is high, low, or tilted, the thread won’t thread accurately, often appearing tapered or miscut. The center gage, therefore, confirms both the tool’s location relative to the centerline and its angle, which are essential for a true external thread. Spindle speed, workpiece length, or tool material aren’t what this gauge checks.

The main idea is making sure the threading tool is positioned on the workpiece’s centerline and oriented at the correct approach angle. A center gage is used to verify that the tool tip sits on the axis of the part and that the tool’s cutting edge is aligned so the thread is formed with the proper geometry. If the tool is high, low, or tilted, the thread won’t thread accurately, often appearing tapered or miscut. The center gage, therefore, confirms both the tool’s location relative to the centerline and its angle, which are essential for a true external thread. Spindle speed, workpiece length, or tool material aren’t what this gauge checks.