7) Calculate the 'Lead of worm' its module is 2 mm and single start.

8) What is ?Lead of worm/?d? in worm calculations?

9) What is 6 in spline designation ?6 x 28 x 34?, IS:2327?

10) Which is used to measure chordal thickness of the gear teeth?

11) Calculate the pitch diameter of worm wheel having module 2 mm and number of teeth is 40.