(a) What is a gear drive ? Also explain its advantages and disadvanta…

Question

(a) What is a gear drive ? Also explain its advantages and disadvantages. A single reduction gear of 120 kW with a pinion 250 mm pitch circle diameter and speed 650 rpm is supported in bearing on either side. Calculate the total load due to the power transmitted the pressure angle being 20°.

(b) A pair of spur gear with 14 and 21 teeth are of involute profile and pressure angle 16°. Find the maximum addenda on the pinion and gear wheel to avoid interference if the module is 6 mm. Also find the maximum velocity of sliding on the other side of the pitch point if the pinion starts at 300 rpm.

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