CBSE Class 12 Engineering Bearings

CBSE Class 12 Engineering Bearings. Students can download the specific chapters from the CBSE and NCERT text books from studiestoday.com. Please refer to the attached file to access the chapters. The books and specific chapters have been collected by the tutors on studiestoday for the benefit of CBSE students. They can access these chapters anywhere and use them for their studies.

BEARINGS

All of you have seen a bicycle and most of you may know how to ride it. With the help of paddles you may have driven it. It needs very little effort to run a bicycle. Do you know why a bicycle runs so smoothly and easily? The reason is that friction is greatly reduced by using bearings in the moving parts and you must have oiled/ greased these bearings from time to time.

In the industry also the bearings are used to help in smooth running of the shafts. As we all know that the friction is a necessary evil. The friction generates heat and opposes the free movement of the moving parts. We can not eliminate the friction together but we can reduce it to a large extent by using some suitable lubricant.

The meaning of bearing as given in the Dictionary is a part of a machine which support another part that turns round a wheel' or it can be defined as the support and guide for a rotating ,oscillating or sliding shaft, pivot or wheel' .

Bearings are used as a mechanical component to a certain part and this is done by utilizing the small frictional force of the bearings, which makes them rotate easily, all the while with the force and load acting against them.

There are two types of bearings according to the type of motion:

1. Plain bearings and

2. Anti-Friction bearings or Rolling Bearings

We will learn that plain bearings are such that they primarily support sliding, radial and thrust loads and linear motions also.

1. Plain Journal Bearings: These support radial loads at right angles to the shaft axis.

2. Spherical Bearings: These are used where the loads are not aligned and are radial.

3. Thrust Bearings: These bearings support axial and radial loads.

4. Linear Bearings: These bearings only help in linear motion.

5. Pivot Bearings or Foot Step Bearings: These bearings are used where the thrust is only axial.

CLASSIFICATION OF BEARINGS

Plain bearings may further be classified as:

ANTI-FRICTION OR ROLLER BEARINGS

These bearings can be:

1. Needle Bearings.

2. Ball Bearings and

3. Roller Bearings.

The bearings mentioned above can be rearranged according to the loading conditions as:

1. Journal Bearings: In this bearing the bearing pressure is perpendicular to the axis of the shaft.

2. Thrust Bearing or Collar Bearing: In this bearing the pressure is parallel to the axis of the shaft.

3. Pivot Bearing: In this bearing the bearing pressure is parallel to the axis of the shaft and the end of the shaft, rests on the bearing surface.

4. Linear Bearings

5. Spherical


Please refer to the link below for - CBSE Class 12 Engineering Bearings

Tags: 

 


Click to View or Download pdf file
Click for more Other Subjects Study Material

Latest NCERT & CBSE News

Read the latest news and announcements from NCERT and CBSE below. Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education. Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning

TV Channels for Students by CBSE

In enhancing the students studying part, the Government is planning to introduce one standard one channel plan. The lockdown in India has adversely collapsed all the operations including schools, colleges, and workplaces with unanticipated setbacks. On behalf of the...

CBSE Decision on Board Exam 2020

The Class 10 and 12 exams are cancelled, and results for both 10th and 12th would be declared by July 15 based on internal exams. CBSE Class 12 students would have the option to appear for the exams at a later date. CBSE has a scheme in which marks scored in past 3...

Board Cancelled Official CBSE Statement

Keeping in view the requests received from various State Governments and the changed circumstances as on date, following has been decided- 1. Examinations for classes X and XII which were scheduled from 1st July to 15th, 2020 stand cancelled. 2. Assessment of the...

CBSE Boards Paper Checking to Start

As per the announcement recently released by the Ministry of Home Affairs, at least 3000 CBSE affiliated selected as evaluation centers for board exam answer sheets will be allowed to open for the limited purpose of evaluation purposes only. The answer sheets for Board...

Board Exams Class 10 and Class 12 Datesheet 2020

CBSE has announced the datesheet for the remaining exams of class 10 and class 12 exams. The exams are going to start in July. The class 10 and 12th board exams will be conducted for the remaining 29 papers from July 1 to July 15, 2020, at various centers nominated by...

CBSE Online Training for Teachers 2020

It is clear that this pandemic has utterly disrupted an education system that many assert was already losing its relevance. Enhancing professional development digitally is a need in the times of COVID-19, where social distancing and remote interactions is the new...

×
Studies Today