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Chapter Summary

Bearings

CBSE · Class 12 · Engineering Graphics

Summary of Bearings for CBSE Class 12 Engineering Graphics. Key concepts, important points, and chapter overview.

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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Overview

Bearings are essential mechanical components that support and guide rotating, oscillating, or sliding shafts while reducing friction. Just like the smooth operation of a bicycle depends on well-lubricated bearings, industrial machinery relies on bearings for efficient operation. This chapter explore

Key Concepts

A bearing is a machine component

A bearing is a machine component that supports another part that rotates, providing guidance for rotating, oscillating, or sliding shafts while minimi

Plain bearings support sliding motion

Plain bearings support sliding motion with direct contact between surfaces, while anti-friction bearings use rolling elements (balls or rollers) to re

A journal bearing with a soft

A journal bearing with a soft material bush (brass, bronze, or gun metal) that can be replaced when worn. Features include grub screw prevention of ro

Features a U

Features a U-shaped cast iron body with collared brass bush. Used for linear and zigzag shafts with elongated bolt holes for adjustment. Suitable for

A split bearing system with two

A split bearing system with two-piece brasses, cap, and body assembly. Named after inventor Plummer, it allows placement anywhere along shaft length a

Learning Objectives

  • Understand the fundamental concept and purpose of bearings
  • Classify bearings based on motion type and loading conditions
  • Learn the construction details of plain bearings including bushed, open, plummer block, and footstep bearings
  • Develop skills in drawing assembly and disassembly views of various bearing types
  • Apply knowledge of bearings in real-world mechanical systems

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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