https://youtu.be/5sO2bfapEpU

Dial Indicator | Dial Gauge | Types Of Dial Indicators | Working Principle

The Dial indicator is a mechanical mean, having gears and pinions or levers for magnification system. They can responses to linear measurement even when they are too small. The Dial Indicators can be used as Comparotors Basically, comparators are the precession measuring instruments used to compare the workpiece measurements with the standard measurements. When this Dial Indicator is used in any measuring equipment for comparison purpose then these equipment are called Dial Gauges. A Dial Indicator must be mounted on any other base/Equipment, otherwise, it will be useless. The accuracy of the dial indicator is up to 0.001 mm are available. Construction of Dial Indicators There is a classification of dial indicators based on their dial shape. They are sector shape Dial Indicator and Circular shape Dial Indicator. But sector type is a quite limited range, so this sector type Dial Indicator is used for extremely accurate measuremen...

RRB JE METROLOGY TOPIC 1 LINEAR MEASUREMENT

What is Linear Measurement?| What are the linear measurement instruments? In Metrology Linear measurement applies to the measurement of lengths, diameters, heights and thickness including external and internal measurements. Instruments used for Linear Measurement: Linear measurement instruments can be classified into Direct and indirect measuring instruments. Direct measuring instruments. Graduated Measuring instruments Non Graduated measuring instruments Indirect measuring instruments. They can be further classified into Precision and Non-Precision gauges. The graduated Instruments: Rules: The most common instrument for measurement is scale. It can be made up of Plastic, wood. Tempered Steel alloys can also be used as materials for precision scales. This is Non-precise measurement gauge. Pierre Vernier Caliper ------------------------------- This is a precise measuring instrument, Comparatively low ac...

RRB JE METROLOGY FULL DETAIL SYLLABUS EXPLANATION

What is the linear measurement and Types of linear measuring instruments. There are a wide variety of geometries that are measured in angular units. These varieties include angular separation of bounding planes, digression from a basic direction, angular spacing conditions related to a circle, etc. Because of these diverse geometrical forms, different types of methods, equipment and instruments are available to measure angles in common angular units of degree, minute and second. Several factors come into the role in the selection of appropriate angular measuring instrument. These factors may be the size, general shape of the part, the location and angular accessibility of the feature to be measured, expected a range of accuracy, etc. As in linear measurement, they can be categorized into two groups. The first one is standard line instrument. It includes divided scales like protractors, Bevel Protractors. The second category of angular measuring instrum...

Chitrance talk

Search This Blog