4) A kiln is driven by a bull gear and pinion arrangement. There are 250 teeth on the bull gear. The pinion has 27 teeth. The pinion is driven by the low speed shaft of a 53:1 reduction reducer. A 400 hp motor turns the high speed shaft of the reducer. How fast does the motor rotate to get the kiln to rotate 4 rpm?

A gear rotating at 1250 rpm is meshed is being driven by another gear at 500 rpm. If the driver gear has 36T, what should be the number of teeth to at least achieve the desired speed?

What is the minimum clearance allowed for meshing spur gears with diametral pitch of 20? The spur gear has 25 teeth.

4- Find the gearing ratio for the given compound gears shown in figure 10. 5- Given that the torque (t) of the driver gear is (40+x) N.m, find the torque of the green gear. (x is the last digit of your ID) (M) rrrrv Figure 10 Figure 11 D Error

Two spur gears are engaged with the angles of approach and recess as 23° and 17° respectively. What is the con- tact ratio if the pitch angle is 27°?

3. A gear having 48 teeth is being driven by a 12-tooth gear running at 800 rpm. Determine the speed of the driven gear if a 24-tooth idler is placed between the driving and driven gear. Note: Draw the gears showing their direction of rotation.

Question 1: A team of engineers from the Department of Mechanical Engineering are task to design a hoist equipment using a reverted epicyclic gear train shown in Figure 1. The drum must be keyed at the centre of the arm E using the same shaft. The pinion gear A is keyed to a second shaft which carries a chain wheel. Whereas the chain must be operated by hand. The two shafts have common axis but can rotate independently. The gear wheels B and C are compound and rotate together on a pin carried at the end of arm E. The gear wheel D has internal teeth and is fixed to the outer casing of the block so that it does not rotate. The wheels A and B have 16 and 36 teeth, respectively, with a module of 3 mm. The wheels C and D have a module of 4 mm. D- B E A- Figure 1: Top view of a reverted epicyclic gear train. 1.1. Draw the side view layout of the gear system to be designed. Clearly indicate the positions of all components. 1.2. Determine the number of teeth of wheel D. 1.3. Make use of the…

Q- The reduction of speed from 360 rpm to 120 rpm is desired by the use of a chain drive. The driving sprocket has 18 teeth. What is the number of teeth on the driven sprocket?