Our frequent contributor Mark Grizotsky writes with additional information on the subject of straight-sided spline shafts. “When we find a trapezoidal profile or form for the angle of the tooth of a ...

Figure 1 shows a spline shaft and teeth together. The teeth of a hob form a trapezia with two lines from sides under angle @. See Figure 1, which shows a spline shaft and teeth, pictured together. If ...

, 'involute gears' and 'cycloid gears', based on the difference in tooth shape. Both types have their own advantages, but technology blogger lcamtuf explains the advantages of involute gears. A ...