engineering recuitment ISRO Scientist Mechanical Mock Test Production Engineering (Manufacturing) Machining Processes and Machine Tools Different Machining Processes
A milling machine has the following two index plates supplied along with the indexing head:
Plate 1 : 15, 16, 17, 18, 19, 20, hole circles.
Plate 2 : 21, 23, 27, 29, 31, 33, hole circles.
It is proposed to mill a spur gear of 28 teeth using a simple indexing method. Which one of the following combinations of index plates and the number of revolutions is correct?
1
Plate 1: 1 revolution and 9 holes in 18 hole circles
2
Plate 2: 1 revolution are 9 holes in 21 hole circles
3
Plate 2: 1 revolution and 9 holes in 33 hole circles
4
Plate 1: 1 revolution and 9 holes in 15 holes circles