The figure below represents a pair of spur gear fitted on a lathe machine. A power of 6 kW at 657 rpm has to be transmitted by a motor shaft, which is input at pinion gear and its shaft rotates in The number of teeth on pinion and the gear are 29, and 72 respectively, while the module is 8 mm. Assume a pressure angle of 20°. Calculate, the torque on the shaft of the pinion and the gear.

b) Figure Q1b shows a compound gear train with Gear A as the pinion (or driver) with an input Power (Pin) of 600 W at Gear A. If Gear A rotates at 139.70 rpm and engages with Gear B, calculate the angular velocity (w) in rad/s for Gears B, C & D; and the input torque (Tin) in at Gear A and output torque (Tout) at Gear D. The number of teeth (N) for gears A, B, C & D are 62 teeth, 34 teeth, 42 teeth and 22 teeth, respectively. Assume 100% efficiency and no frictional losses; and give your answers to two decimal places. GEAR A GEAR C GEAR B GEAR D

A gear box has an input speed of 1800 rev/min clockwise and an output speed of 400 rev/min The input power is 25kW and the efficiency is 90%. Compute the input torque                                                                                                                                                  the output power                                                                                                                                                       3. the output torque

Two spur gears are to have a ratio of 9:3 and a 7mm module. If the center distance is to be approximatively 200mm, calculate the following:o Circular pitch value;o Number of teeth on the wheel (gear);o Number of teeth of the pinion;o Pitch circle diameter of the gear;o Pitch circle diameter of the pinion;