1. Department of Robotics & Automation
JSS Academy of Technical Education, Bangalore-560060
Computer Aided Machine Drawing
(Course Code:21RA35)
2. TEXT BOOKS
• Machine Drawing, K R Gopala Krishna, Subhash Publication, 2005.
• Machine Drawing, N D Bhat & V M Panchal, Charoratar publishing house, 2005.
Further Reference:
National Programme on Technology Enhanced Learning (NPTEL)
https://nptel.ac.in/courses/112103019/
3. • To impart knowledge of thread forms, fasteners, keys, joints and couplings.
Course Learning Objectives
4. Joints
Joints
1. Cotter joint (socket and spigot)
2. Knuckle joint (pin joint)
* Memory drawings: No part drawings will be given.
* All the proportions you need to remember with reference to joints.
* Based on the given dia., you need to draw the Front & Top view of the joints.
5. • This joint is used to fasten two circular rods.
• One end of the rod is formed into a socket and the other into a spigot, and
slots are cut.
• After aligning the socket and spigot ends, a cotter is driven-in through the
slots, forming the joint.
Joints
1. Cotter joint (socket and spigot)
10. 1. Cotter joint (socket and spigot)
Take diameter = 25 mm and draw the front view of cotter joint
Joints
11. 1. Knuckle joint (Pin Joint)
• A knuckle joint is a pin joint used to fasten two circular rods.
• One end of the rod is formed into an eye and the other into a fork (double eye).
• The eye end of the rod is aligned into the fork end of the other and the pin is
inserted through the holes and held in position by means of a collar and a taper
pin.
• The rods are free to swivel about the cylindrical pin.
Applications: used in suspension links, air brake arrangement of locomotives, etc.
Joints