Least Count of Screw Gauge
The least count of a screw gauge is the smallest reading and recording unit of an instrument. The screw gauge comprises a principal marking and a moving one called thimble that goes around the principle marking.
Number of Divisions on Circular Scale = Pitch/Least Count
Since the pitch for the screw in this case equals 1 mm and the instrument’s circular scale has 100 divisions, its least count would therefore be 0.01 mm.
Least Count of Screw Gauge Formula
The least count of Screw Gauge formula is given as:
Least Count (LC) of Screw Gauge = (Pitch)/(Total Number of Divisions on Circular Scale)
Least Count of Micrometer Screw Gauge = (1 mm)/(100) = 0.01 mm
In other words, users must place the object between the anvil and the spindle, and then turn the thimble so as to get the two objects into contact with each other. When using the least count accuracy, it is important to minimize errors like parallax and wrong alignment so that accurate readings are obtained.
Screw Gauge: Definition, Working Principle, Formula
Screw Gauge is an amazing device used for measuring small objects precisely. It is defined as an instrument that is used for measuring very small lengths, i.e. diameter of thin wires, the thickness of small sheets, papers, etc.
In this article, we will learn about Screw Gauge, Its structure, Diagram, Working Principle, errors in screw gauge, its applications, and others in detail.
Table of Content
- What is Screw Gauge?
- Screw Gauge Formula
- Screw Gauge Diagram
- Working Principle
- Errors in Screw Gauge
- Uses of Screw Gauge