What is the purpose of a micrometer's ratchet stop?

The micrometer's ratchet stop serves a crucial function in ensuring consistent and accurate measurements. Its primary purpose is to prevent over-tightening during the measurement process. When a user measures an object, the ratchet stop provides an audible click or tactile feedback once the measurement pressure has reached an optimal level. This feedback ensures that the user does not apply excessive force, which could deform the object being measured or lead to inaccurate readings.

By using the ratchet stop effectively, the operator can achieve repeatable measurements and maintain the integrity of both the micrometer and the workpiece. This feature is especially important in precision tasks where measurement accuracy is critical.