IGD has been developed considering the extension of its capabilities to all types of gear sets. The gear set types implemented in the latest version of IGD are shown on the right side figure by means of a green mark. The gear set types that are pointed by means of a red X-shaped mark will be implemented in the near future.

The gear set types are organized considering the arrangement between the gear axes into the following three categories: Parallel Axes, Intersecting Axes, Crossed Axes, and Coaxial Axes.

• Parallel Axes gear set types are organized into two groups: External and Internal.
  • Parallel Axes - External gear set types include spur, helical, curvilinear, and pinion-rack gear sets.
  • Parallel Axes - Internal gear set types include spur, helical gear gear sets. The strain wave gears are a work in progress now.
• Intersecting Axes gear set types include straight bevel, spiral bevel, face gear, and beveloid gear sets.
• Crossed Axes gear set types include crossed helical, offset face gears, globoidal worm and hypoid gear sets.
• Coaxial Axes gear set types include planetary gear sets and spline couplings.