cream cheese

[redjump]

Hello, who can give me some advice or some document on how to build a racket? ? I can not build the profile for extrusion, on my book there are instructions for a toothed wheel and up there are, the profile is built according to the fact that the wheel is circular, but the rack is not..
Thank you.

 

[peloritano]

The profile of a rack is a simple trapeze
the sides of this trapeze are inclined of an angle equal to that of thrust of the gear with which it mates

 

[redjump]

is the same thing?

 

[redjump]

The profile of a rack is a simple trapeze
the sides of this trapeze are inclined of an angle equal to that of thrust of the gear with which it mates

is the same thing?

 

[paolino]

teeth profiles are always evolving; The racks are trapezoidal with the tilt angle of the faces equal to the pressure angle of the wheel.

the two gears and everything works because the trapezoidal profile is the profile that you get by building an evolving profile on an infinite radius circumference. . .
http://it.wikipedia.org/wiki/ingranaggio