1. END OF CHAPTER
1.1. Draw and label a schematic drawing of how you would check the core
diameter of an external V-thread.
1.2. Using ‘best’ wire sizes determine the distance of the wire for M 20 x 2.5
ISO metric thread.
1.3. Why is the three-wire method is one of the best method of measuring the
pitch diameter of a V thread?
1.4. With the aid of a labelled diagram, briefly explain how you would use an
optical comparator to check the thread angle of 60o