What is the role of a go-no-go gauge in machining?

A go-no-go gauge is a precision measuring tool used in machining to evaluate the dimensions of a workpiece against specified tolerances. The primary function of this gauge is to ensure that the part fits within prescribed limits, allowing for a definitive pass or fail measurement—hence the name "go-no-go."

When it comes to checking reamed pilot holes for the correct diameter, a go-no-go gauge can confirm whether the hole has been machined to the appropriate size. The "go" side of the gauge will fit into a reamed hole of the specified diameter, indicating that the hole is acceptable. Conversely, if the "no-go" side does not fit, it indicates that the hole is either too large or has not been reamed correctly, thus failing the measurement criteria.

This function is critical in ensuring that parts fit correctly during assembly and maintaining the overall quality of the manufacturing process. The precision required in aerospace applications makes go-no-go gauges vital for maintaining tolerances, safety, and functionality in the final product.