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Bearings — Study Plan

CBSE · Class 12 · Engineering Graphics

A step-by-step study plan for Bearings, CBSE Class 12 Engineering Graphics: what to learn first, what to practise and when to revise.

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An illustration showing a bicycle wheel axle with and without bearings. The 'without bearings' side shows high friction (red, rough contact) and difficulty in rotation. The 'with bearings' side shows
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Study Plan

1
Day 1–2

Learn the Theory

Read the textbook chapter carefully. Note down definitions, formulas and key ideas. Focus on: Introduction to Bearings, Classification of Bearings, Bushed Bearing.

2
Day 3

Practise

Solve the textbook exercises and extra practice questions.

3
Day 4

Revise & Test

Revise key points without looking at your notes. Take a practice quiz and mark weak areas for another pass.

4
Day 7

Spaced Revision

Come back to Bearings after a week. Use flashcards for quick recall and try past exam questions on this chapter.

What to Focus On

  • Bearings reduce friction between moving parts
  • They support and guide rotating, oscillating, or sliding components
  • Lubrication is essential for proper bearing function
  • Two main categories: Plain Bearings and Anti-Friction Bearings
  • Plain bearings support sliding, radial, thrust, and linear motions
  • Anti-friction bearings include needle, ball, and roller types
  • Form a sleeve around the shaft for support
  • Support only radial loads perpendicular to shaft axis
  • The shaft portion inside the bearing is called the journal

Common Mistakes to Avoid

All bearings can be used interchangeably for any type of load - radial, axial, or thrust loads

In sectional views of assembled bearings, all internal parts should be shown with the same hatching pattern

Plummer blocks and bushed bearings serve the same purpose and can be used interchangeably

Memory Tips

Types of bearings - Plain and Anti-friction

Five types of plain bearings

Bicycle runs smoothly due to bearings reducing friction

Journal bearing supports radial loads perpendicular to shaft axis

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Frequently Asked Questions

What are the important topics in Bearings for CBSE Class 12 Engineering Graphics?
Key topics in Bearings include Introduction to Bearings, Classification of Bearings, Bushed Bearing, Open Bearing. 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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