Basic Bevel Gear Geometry: Why Not?


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Posted by Hobman on March 13, 2010 at 07:12:33:

So, i found myself interested in bevel gear geometry. The fundamental aspects for 90°, interesecting shaft bevel gears are fairly well explained, about how-and-why cone angles, apexes, pitch angles and the usual jive.

BUT

I find myself posing an alternative question of, why not?

If I desire a set of bevel gears at 90°, at say a 2:1 ratio, why are the gear's and pinion's respective angle NOT 45° each? It seems to me that if i had two gear blanks of equal thickness, (but unequal diameter) each provided with an angle of 45° and involute teeth added thereto, that these gears would assemble and run happily at 90°.

I do realize that these gears would not follow conventional gear design parameters. So what?

Or, phrased differently, so my cone line apexes don't intersect... You got a problem with that?

So... just wondering...




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