What is the best way to identify a cog for my project?

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Identifying the right cog for a project involves considering the application requirements, such as the need for bevel gears for 90-degree angles and spur gears in the same plane. An effective approach may include creating an integral unit by hobbling both gear types from a single piece, although this could increase the size of the component due to necessary clearance for the hobbing tool. The design must balance functionality with practical manufacturing constraints. Overall, careful planning in gear design is crucial for project success.
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Yea, LEGO gears :-P

But really, I would imagine that in a 'real' application, you would have to have a separate bevel gear (90*) and spur gear (same plane). These could possibly both be hobbed from a single piece, making an integral unit, however you would need to leave enough clearance between the blanks for the hobbing tool, so the part would likely be kinda big relative to the size of the gears.
 

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