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Shaft Couplings

CBSE · Class 12 · Engineering Graphics

Quick revision notes for Shaft Couplings — CBSE Class 12 Engineering Graphics. Key concepts, formulas, and definitions for last-minute revision.

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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Key Topics to Revise

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

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Full Notes

Key Concepts

Mechanical devices used to join twoA standard form of coupling extensivelyType of flange coupling where boltModified flange coupling with a flaredAlignment system where one flange has

Frequently Asked Questions

What are the important topics in Shaft Couplings for CBSE Class 12 Engineering Graphics?
Shaft Couplings covers several key topics that are frequently asked in CBSE Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Shaft Couplings — CBSE Class 12 Engineering Graphics?
Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision before the 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 7 chapters — CBSE Class 12 Engineering Graphics Revision Notes

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