Answer :
The tool used to measure very small part movements from the given options is the Dial Indicator.
Dial indicators are precision measurement tools used to measure small linear distances or movements. They are used in various applications, such as in manufacturing and engineering settings, to ensure components meet precise specifications and tolerances.
How it works:
Setup: The dial indicator is typically mounted on a stand or a mechanical device that allows the probe to contact the part to be measured. It has a plunger, which moves in and out perpendicular to the object being measured.
Precision Measurement: As the plunger moves due to the part's movement or vibration, a gear mechanism rotates the dial face. The face of the dials usually has markings with precision divisions, often 0.001 inches (1 thousandth of an inch) or 0.01 millimeters, which makes it possible to measure very small differences.
Reading the Measurement: The user reads the dial face, which translates the mechanical movement of the plunger into a visible reading. The user can then interpret the movement or size change.
Why choose a Dial Indicator over others?
Accuracy and Precision: Dial indicators provide a high level of precision, which is essential in quality control processes.
Versatility: They can be used to measure deflection, alignment errors, and ensure the uniform thickness of manufactured parts.
Ease of Use: The clear, easy-to-read dial makes them user-friendly for operators in various industrial settings.
In contrast, devices like telescoping gauges, inside calipers, and outside calipers are not primarily designed for measuring minute movements but rather for measuring dimensions such as widths, diameters, and depths.
Thus, the correct choice for measuring very small part movements is the Dial Indicator (Option 3).
