Document Type : Research Paper


Mechanical Engineering Dept., University of Technology-Iraq, Alsina’a street, 10066 Baghdad, Iraq.


The gear is a very important component of power transmission in a flying vehicle and rotating mechanisms etc... In this paper, the dynamic effect and stresses generated as a result of the mash gear will be studied by designing light-weight gears by making lightening holes of multiple diameters (14, 19, 24 and 29) mm at serval speeds (500,1000,1500,2000) that represent the variables parameter with a fixed dimension between the center of the holes and the center of rotation of the gear 43 mm and the number of 5 holes for gears with reduction ratios of gear mass ranging from (3.6%-15%) that represent the constant parameter. The 5-hole gear is better with a hole diameter (0.1085 * Dp) which is equivalent to 19 mm in this research with respect to the gear diameter of 175 mm. Where the maximum value of stress concentration in the root of the tooth reached 0.655 M.N/m^2.

Graphical Abstract


  • To loosen the gear, it was found that in the case of perforating it, 5 holes are optimal in terms of vibration
  • The perforation diameter must be equal to 0.1085 *Dp
  • Using c35 gears through design calculations
  • Working at different speeds from 0 to 2000 revolutions per minute
  • Calculations of stress concentration


Main Subjects

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