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Shaft Couplings — Syllabus

CBSE · Class 12 · Engineering Graphics

What Shaft Couplings covers in CBSE Class 12 Engineering Graphics: 4 topics, for the 2026-27 session. Topics include Introduction to Shaft Couplings.

5 concepts

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An illustration showing two scenarios where shaft couplings are used: (a) connecting shafts of different machines (e.g., motor to pump) and (b) extending a long transmission shaft by joining two short
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4 Topics · CBSE Class 12 Engineering Graphics · 2026-27

Topics in Shaft Couplings

1

Introduction to Shaft Couplings

  • Shaft couplings join two shafts to transmit rotary motion and power
  • Used when shafts are at distance or when connecting different machines
  • Shafts have limited lengths for transport ease, requiring connections
2

Types of Flange Couplings

  • Two main types: Unprotected and Protected flange couplings
  • Both use similar components but differ in flange shape
  • Protected type has additional safety features
3

Unprotected Flange Coupling - Design and Features

  • Two similar cast iron flanges with keyways in hubs
  • Rectangular sunk keys connect shafts to flanges at right angles
  • Keys driven from inside faces of flanges for easy fitting
4

Protected Flange Coupling - Design and Features

  • Similar components to unprotected type with modified flange shape
  • Flared and flattened rim (shroud) covers bolt heads and nuts
  • Enhanced safety prevents accidents and clothing entanglement

Key Concepts

Central concept: Shaft Couplings are mechanical devices used to connect two shafts end-to-end for power transmission between machines or to extend shaft length

Types of Flange CouplingsComponents and AssemblyDesign FeaturesApplications

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Frequently Asked Questions

What are the important topics in Shaft Couplings for CBSE Class 12 Engineering Graphics?
Key topics in Shaft Couplings include Introduction to Shaft Couplings, Types of Flange Couplings, Unprotected Flange Coupling - Design and Features, Protected Flange Coupling - Design and Features. Study these first, then practise questions on each for the CBSE Class 12 board exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All CBSE Class 12 Engineering Graphics Syllabus

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