CBSE Class 12 Engineering Rod Joints

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

Rod Joints Class 12 Engineering NCERT

Class 12 Engineering students should refer to the following NCERT Book chapter Rod Joints in standard 12. This NCERT Book for Grade 12 Engineering will be very useful for exams and help you to score good marks

Rod Joints NCERT Class 12

ROD JOINTS

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

COTTER
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. 

Exercises

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?

 

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