Engineering Workshop MECHANICAL THEORY

10 Measuring Instruments and their Uses in Engineering Workshop & Production

Measuring Instruments plays a vital role in the Engineering Workshop. The Instruments duty is to measure the given specimen according to the given dimensions. Without these instruments, it is not possible to measure the dimensions of the specimen. Therefore, In this article, I will be explaining the 10 Measuring Instruments and their Uses in Engineering Workshop in a detailed way.

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Read:3 Types of Marking Out Tools used in Fitting – Engineering Workshop

Before knowing the instruments,yo u need to know the units of measurement in both C.G.S and M.K.S System and are as follows.

1.Metric system(C.G.S)

  • Length is measured in centimeter (cm)
  • Mass is measured in grams (gm)
  • Time is measured in second (s)

2.S.I system(M.K.S)

  • Length is measured in meter (m)
  • Mass is measured in Kilograms (kg)
  • Time is measured in second (s)
10 Measuring Instruments and their Uses in Engineering Workshop
10 Measuring Instruments and their Uses in Engineering Workshop

10 Measuring Instruments and their Uses in Engineering Workshop:

The 10 Measuring Instruments and their uses are presented below.

  1. Steel rule & Measuring Tape
  2. Surface Plate
  3. Divider
  4. Try square
  5. Inside Calliper
  6. Outside Calliper
  7. Odd leg caliper
  8. Vernier Calliper
  9. Micrometer
  10. Vernier Height Guage 

The detailed explanation of 10 Measuring Instruments and their uses are shown below.

1.Steel rule & Measuring Tape

Steel Rule:

  • It is an instrument in geometry which is used to measure the length, breadth, and height of the given specimen

Measuring Tape:

  • It is a flexible form of ruler.
  • It is calibrated in terms of mm,cm and inches.

2.Surface  Plate

  • The Surface plate is used for testing the flatness of a w/p.
  • It is more precise than the marking table.
  • The surface plate is made up of C.I. or hardened steel or Granite stone.

Read: The Surface Plate used in Fitting-Engineering Workshop

3.Divider:

This is used for marking circles, arcs, laying out perpendicular lines, bisecting lines etc. on the given specimen.

Read: Divider-Measuring Tools used in Engineering Workshop

4.Trysquare:

  • It is used for marking and checking right angles(Flatness & Squareness) of the given workpiece.
  • These Try squares come in various sizes from 75mm-300mm.

5.Inside caliper:

The inside caliper is used to measure the internal size of an object.

Read: Inside Caliper-Measuring Tools used in Engineering Workshop

6.Outside Calliper:

  • The outside caliper is used to measure the external size of an object.

Read: Outside Caliper-Measuring Tools used in Engineering Workshop

7.Odd-Leg Caliper:

  • This is also called “Jenny Caliper”.
  • This is used for marking parallel lines from a finished edge and also for locating the center.

8.Vernier Calipers

  • Vernier Callipers is used to measure the dimensions of the given specimen like diameter(Outer Dia and Inner dia), length and depth etc. For detailed information, click on the below link.
  • L.C. of Vernier Callipers is 0.02 mm.

Read: Vernier Callipers- Formula, Construction, Expt.-Every Engineer Must know

9.Micrometer

A micrometerr is used to measure the diameter of the given specimen only. It is not used to measure the depth of an object which can be done by measuring the depth probe of Vernier calipers.

  • L.C. of Micrometer is 0.01 mm.

10.Vernier Height Guage

  • A height gauge is a measuring device used either for determining the vertical distances or for the repetitious marking of items to be worked on.
  • The capacity of the height gauge is specified by the maximum height it can measure.
  • It varies from 150 mm to 1000 mm.

For Diagram and Parts of Vernier Height Guage, Click Here

This is the complete explanation of the 10 Measuring Instruments and their uses in a detailed way.

A Part from the Measuring Instruments used in Workshop, I will discuss a few types of instruments used in Production Labs also.

So, Let’s Start…

  1. Surface Measuring Instruments
  2. Linear Measuring Instruments
  3. Angular Measuring Instruments
  4. Taper Measuring Instruments

The explanation of the above Measuring Instruments is as follows.

1.Surface Measuring Instruments:

Under Surface Measuring Instruments, we have

  1. Profilometer
  2. Optical flat
  3. Surface Gauge
  4. Surface edge
  5. Surface plate

2.Linear Measuring Instruments:

Linear measuring instruments are divided into 4 categories and are as follows.

  1. Non–Precision Instrument
  2. Precision Instrument
  3. Comparators
  4. Measuring Machines

The measuring instruments which come under Non-Precision Instruments are

  1. Depth Gauge
  2. Dividers
  3. Steel rule
  4. Telescopic Gauge
  5. Calipers

The measuring instruments which come under Precision Instruments are

  1. Micrometers
  2. Slip Gauges
  3. Vernier Calipers
  4. Height Gauges

The measuring instruments which come under Comparators are

  1. Pneumatic
  2. Mechanical
  3. Optical
  4. Electrical

The measuring instruments which come under Measuring Machines are

  1. Co-Ordinate Measuring Machines (CMM)
  2. Tool Maker’s Microscope

3. Angular Measuring Instruments:

Angular measuring instruments are used for measuring the angularity of the given components. They are classified as

  1. Precision Instruments
  2. Non – Precision Instruments

Non – Precision Instruments

  1. Combination set
  2. Protractors
  3. Adjustable bevel

Precision Instruments

  1. Clinometers
  2. Bevel Protractor
  3. Dividing head
  4. Spirit level
  5. Sine bar
  6. Angle Gauge
  7. Autocollimators

4.Taper Measuring Instruments:

Taper measuring instruments are used for the measuring slope type of surfaces on the components.

  1. Taper micrometer
  2. Toolroom microscope
  3. Bevel Protractor
  4. Sine bar and dial gauge
  5. Autocollimators
  6. Slip gauges, Rollers and micrometer

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