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Bearings

CBSE · Class 12 · Engineering Graphics

Step-by-step guide to study Bearings in CBSE Class 12 Engineering Graphics. Topics to cover, practice strategy, and time allocation.

5 concepts

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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 concepts.

2
Day 3

Practice Problems

Solve textbook exercises and additional practice questions. Focus on numerical problems and application-based questions.

3
Day 4

Revise & Test

Revise key formulas and concepts without looking at notes. Take a practice quiz to test your understanding. Mark weak areas for re-revision.

4
Day 7

Spaced Revision

Revisit Bearings after a week. Use flashcards for quick recall. Solve previous year questions from 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?
Bearings 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 Bearings — 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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