InGear analysis this chapter, we introduce several types of gear that are used in common machines. After that, we provide a more detailed analysisSensitivity analysis of the spurSpur gear in terms of the definition of the configuration parametersParameters of a single gear. This is followed by explaining the twoMeshed gears meshed gearsMechanismmeshed gears and how to design a toothProfile profile. Standardized gear manufacturing and design are introduced to set up a procedure for a straightforward gear design.