John:
Yes, my math was screwy.
Ive deleted that helical bevel, its teeth were way too tall in the cone. Here is a better example of a helical bevel with proper tooth scaleing.
For those with bevel interest, take note that there are a few ways of generating bevels. A few differing "standards". Some , for example, some say the tooth
form of a bevel should basically be the spur gear outline when looked at from the outside face, the teeth should then twist and scale so everything terminates
at the imaginary cone apex. Other standards call for the center of the gear to be the spur gear tooth and the tooth scales outward to the outter face, and inwards to the
cone apex. ( This means a pinion of less facewidth would mesh in the respective center of the opposing wheel with empty teeth on each side. Ive opted for the original spec which
forces all bevels to mesh at the outside edge. So if a pinion of facewith 5 is meshed to a wheel of facewidth 10, the wheel and pinion woudl mesh from back edge
to center of wheel leaving the inside 5mm unused. ( If thats understandable.
)
Here is a sample of a much better helical bevel and should be like most bevels you could purchase. In theory this bevel should mesh with any
OEM bevel of the same angle and module. It properly scales the teeth in respect to addendum and dedendum unlike the previous sample that made sharp
peaks on the top edge.
Thx
Art