Need for a Comparator

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Prepared by,
Mr. S. B. Kamble
Department of Mechanical Engineering
Sharad Institute of Technology, College of Engineering, Yadrav
Need for a Comparator
Subject – Metrology and Quality Control

2. Need for a Comparator
Image source- Internet

3. Linear Measurement
Image source- Internet

4. Image source- Internet

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Standard Workpiece
Need for a Comparator
A comparator is a precision instrument employed to compare the dimension of a
given component with a working standard (eg. Slip Gauge)
Indicates only dimensional
difference in relation to the
basic dimension.
Image source- Internet

6. Requirements of a Good Comparator
• Robust Design and Construction
• Linear characteristics of scale
• High magnification
• Quick in results
• Minimum wear of contact points
• Free from oscillations
• Free from backlash
• Quick insertion of Workpiece
• Adjustable table
• Compensation from temperature effects
• Means to prevent damage
• Versatility

7. Use of Comparator
Laboratory Standards Working gauges
Final Inspection gauges
Receiving Inspection gauges For Checking Newly Purchased
Gauges Image source- Internet

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