Question: 7B A) What do you understand by the term 'Interference' & 'undercutting' as applied to gears B) A pinion of 20 involutes teeth and

7B A) What do you understand by the term 'Interference' & 'undercutting'

7B A) What do you understand by the term 'Interference' & 'undercutting' as applied to gears B) A pinion of 20 involutes teeth and 125mm pitch circle diameter drives a rack. The addendum of both pinion and rack is 6.25mm. What is the least pressure angle which can be used to avoid interference? With this pressure angle, find the length of the arc of contact and the minimum numbers of teeth in contact at a time.

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