Engineering Metrology

The screw thread concept seems to have occurred first to Archimedes, who briefly wrote on spirals as well as designed several simple devices applying the screw principle. In the 1500s, screws appeared in German watches, and were used to fasten suits of armour. In the 1800s, screw manufacturing began in England during the Industrial Revolution. In these times, there was no such thing as standardization. The bolts made by one manufacturer would not fit the nuts of another. There are many ways to generate a screw thread, including the traditional subtractive types (for example, various kinds of cutting [single-pointing, taps and dies, die heads, milling]; molding; casting [die casting, sand casting]; forming and rolling; grinding; and occasionally lapping to follow the other processes); newer additive techniques; and combinations thereof.

All the content of this course has taken on the real screw threads. With this course all your doubts and misconceptions about the screw will get clear. The knowledge of the screw thread is very important for the Mechanical Engineering students. This course will also benefit the industry person for refreshing their knowledge about the screw thread. The various chapters of the course cover all aspects of the screw thread measurement. Students will understand the screw threads at the application level. The measuring instruments shown in this course are accurate and follow the ISO standards. All the standard practices followed during measurement on the instruments.