(Solved):   Figure 1 Example of a simple spur gear train with an idler A simple spur gear train with a ...

 

Figure 1 Example of a simple spur gear train with an idler A simple spur gear train with an idler must transmit 650 W power. The pinion A is rotating at 92 rpm in an anticlockwise direction. Gear C has 45 teeth. Both the pinion and the idler are of the same size. Material proposed for pinion A and gear C is heavy- duty 817M40 steel, while for idler B is heavy-duty 655M13 Case hardened steel. Use the Lewis formula and refer to the prescribed textbook: the 3rd Edition refers to Table 5.9, while in 2nd Edition refers to Table 6.9. 1.1 Briefly state the problem. 1.2 State the product design specification for a gearbox stated above, considering the performance as design factor. 1.3 List four (4) types of gear trains. 3 Page 1 1.4 What is the purpose of the idler? 1.5 Use the Lewis formula to determine the minimum face width of the pinion A, idler B and gear C. Note: Show one set of calculations, then tabulate the results for all three gears. 1.6 Based on the calculated face width in question 1.5 above, select suitable gears from the limited selection presented in the prescribed textbook; 3rd Edition refers to Table 5.9 while in 2nd Edition refers to Table 6.9.