CBSE Class 12 Engineering Rod Joints

Read and download CBSE Class 12 Engineering Rod Joints chapter in NCERT book for Class 12 Other Subjects. You can download latest NCERT eBooks for 2021 chapter wise in PDF format free from This Other Subjects textbook for Class 12 is designed by NCERT and is very useful for students. Please also refer to the NCERT solutions for Class 12 Other Subjects to understand the answers of the exercise questions given at the end of this chapter


All of you have seen a tractor and its trolley/ trailer. The trolley can be easily joined or removed from the tractor as per the need. Have you ever noticed that how this trolley is joined or detached from the tractor? This work is made so simple by a joint between the tractor and the trolley using a pin or a cotter. A fork end is there at the back of the tractor and an eye end is there in front of the trolley and a round rod is inserted in between these two to make the joint. In industry also different cotter joints are used some of these we shall learn in the following paragraphs. First of all we shall learn about the cotter.

 CBSE Class 12 Engineering Rod Joints

A cotter is a flat rectangular cross section wedge-shaped piece or bar of mild steel block which is uniform in thickness but tapering in width on one side in general. It is used to connect rigidly two rods, whose axes are collinear and which transmit motion in the axial direction (tensile or compressive forces) without rotation. The cotter is inserted perpendicular to the axes of the shafts which are subjected to tensile forces. Cotter provides rigid joint support. 


Q.1. What is cotter?

Q.2. What are dimensions of a cotter in terms of the diameter of the shafts to be joined?

Q.3. Why clearance is necessary in a cotter joint?

Q.4. What do you understand by the self locking of the cotter?

Q.5. Why a Gib is used along with a cotter in a Gib and cotter joint?

Q.6. Where knuckle joint is used?


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



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

Time management for CBSE students

The first thing to learn about Time Management is that time is theoretical so you can’t really manage it. What you do when you get into time management, is that you manage yourself. You decide what has to be done, when it must be done and how to do it in the stipulated...

Class 10 Boards Cancelled Class 12 postponed

Looking to the present situation of the pandemic and school closures, and also taking in account the safety and well-being of the students, it is decided as follows:   1. The Board Exams for Class XIIth to be held from May 4th to June, 14th, 2021 are hereby postponed....

Latest CBSE Syllabus for 2021 2022 PDF Download

Latest Syllabus for Class 12 for 2021 2022 Latest Syllabus for Class 11 for 2021 2022 Latest Syllabus for Class 10 for 2021 2022 Latest Syllabus for Class 9 for 2021 2022 CBSE has issued the latest syllabus for the academic year 2021 2022 which is applicable for all...

Revised Datesheet for Class 10 and 12 Board Exams

Revised date sheet for Class 12 - scroll down for datesheet for class 10 Revised datesheet for Class 10

CBSE Assessment Framework

The Central Board of Secondary Education (CBSE) today, announced a suggested competency-based assessment framework to strengthen India’s existing school education system for secondary level (classes 6-10) and improve the overall learning outcomes of students across...

ICSE Board Exams Cancelled

The ICSE (Class X) 2021 Examination: Given the present worsening situation of the Covid- 19 Pandemic in the country, the CISCE has decided to CANCEL the ICSE (Class X) 2021 Examination. The options given in the earlier Circular dated 16th April 2021, now stands...

Studies Today