Shaft Couplings — Study Plan
CBSE · Class 12 · Engineering Graphics
A step-by-step study plan for Shaft Couplings, CBSE Class 12 Engineering Graphics: what to learn first, what to practise and when to revise.
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Learn the Theory
Read the textbook chapter carefully. Note down definitions, formulas and key ideas. Focus on: Introduction to Shaft Couplings, Types of Flange Couplings, Unprotected Flange Coupling - Design and Features.
Practise
Solve the textbook exercises and extra practice questions.
Revise & Test
Revise key points without looking at your notes. Take a practice quiz and mark weak areas for another pass.
Spaced Revision
Come back to Shaft Couplings after a week. Use flashcards for quick recall and try past exam questions on this chapter.
What to Focus On
- Couplings connect two shafts end-to-end for power transmission
- Used to extend shaft length or connect different machines
- Enable transmission of rotary motion and torque
- Standard form of coupling extensively used in industry
- Consists of two similar flanges mounted on respective shafts
- Suitable for heavy loads and high power transmission
- Basic form with exposed bolts and nuts on outer circumference
- Two cast iron flanges with keyways in central hubs
- Shafts secured with rectangular sunk keys at right angles
Common Mistakes to Avoid
All flange couplings are the same - protected and unprotected types are just different names for the same thing
Keys in both shafts of a flange coupling are aligned parallel to each other
Spigot and socket arrangement is just decorative and doesn't serve any functional purpose
Memory Tips
Definition of Shaft Coupling
Two types of Flange Couplings: Protected and Unprotected
Unprotected Flange Coupling has exposed bolt heads
Protected Flange Coupling has shrouded rim covering bolt heads
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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