Screw gauges are precision measuring devices that are widely used in engineering, manufacturing, laboratories, and research to precisely measure linear distances, wire radius, and glass plate thickness, among other things.

To get accurate readings, common errors such as zero error, least count error, and parallax error must be addressed.While concentrating on the measurement, keep the screw gauge’s errors to a minimum.In this part, we will look at screw gauge formula and the applications of a screw gauge in various fields. 

SCREW GAUGE FORMULA 

PITCH OF A SCREW GAUGE

Pitch is the linear distance traveled by the screw head in a successful rotation of the screw.

                                                                     (OR)

Pitch is the axial distance between threads and the distance the thread moves with 360-degree revolution.In most cases, it turns out that the pitch is 1 mm.

While rotating the thimble, the spindle advances towards the anvil. Give the thimble seven complete rotations, that is move the circular scale by 100 calibrations seven times and note the distance moved in the pitch scale.

SCREW GAUGE – IMAGE

PITCH OF THE SCREW GAUGE:

LEAST COUNT OF A SCREW GAUGE

DIAMETER OF A WIRE USING SCREW GAUGE

ZERO ERROR IN A SCREW GAUGE

SCREW GAUGE USES

DIAMETER AND THICKNESS

A screw gauge is used for measuring accurately the diameter of a thin wire or the thickness of a metal sheet. It can also be used to measure the thickness of a paper.

MECHANICAL ENGINEERING AND MACHINING:

A screw gauge is used for the accurate measurement of components in mechanical engineering and machining.

Micrometer, sometimes called micrometer screw gauge is also used in telescopes or microscopes to measure the apparent diameter of celestial bodies or microscopic objects.

MEASURING THE GAUGE

It is named as screw gauge, because it is used to measure the gauge of a metal sheet or a wire. The gauge number of a wire or metal sheet can also be verified.

CONSTRUCTION :

In the construction industry, it is used to measure the diameter of the steel rod, which is used in the construction of building.

MICROMETER SCREW GAUGE:

A micrometer is the type of gauge,that gives the precise measurement of small distances.Calibration checks the precision of the measuring instrument and determines how far the measurement can be relied upon.

CONCLUSION

Screw gauges are an accurate, precise, and adaptable instrument that plays an important part in their precision and dependability as a measuring item for a wide range of things.Users of screw gauges can accomplish more precise measurements and assure the trustworthiness of their results with a basic grasp of zero error, zero correction, and formula.

Screw gauges are a must-have tool for engineers, machinists, and quality control personnel.Because of its vast application in a variety of sectors, the screw gauge remains a vital tool for precise measurements, contributing to the growth of science, engineering, and technology.

Link to NEET PHYSICS

Link to Zero, positive and negative error

Link to screw gauge numericals

Link to Least count of a screw gauge

Frequently Asked Questions

• What is the principle behind a screw gauge’s operation?
• What are the main parts of a screw gauge, and what is the function of each part?
• What is the least count of a screw gauge and how is it calculated?
• What is the screw gauge formula and what do the variables represent?
• How does the formula account for  circular scale and main scale readings?
• Besides diameter and thickness what else can a screw gauge measure?