AGMA 901-A92 pdf download.Method for Specifying the Geometry of Spur and Helical Gears.
A simple,closed-form procedure is presented as a first step in the design of minimum volume spur and helicalgearsets.The procedure includes methods for selecting geometry and dimensions,considering maximumpitting resistance,bending strength,and scuffing resistance.It also includes methods for selecting profileshift.
This information sheet is intended for the student or beginning gear designer, to provide an outline of a preliminary design procedure which will lead to a rational design for spur and helical gear pairs within constraints such as:
required gear ratio;
required torque capacity;
specified center distance;
material selection.
This method could be extended to other gear types given the appropriate constants and factors.
Procedure
The simple closed form of the procedure allows the designer to explore options with a minimum of computation so that the important design decisions regarding loads, overloads, material, and tooling selections are not obscured by the need to spend a long time calculating each possibility.
This information sheet will demonstrate to the user that the traditional beginning point for gear design, selecting the minimum number of pinion teeth to avoid undercut, will rarely lead to the best design.
As this procedure is approximate, it is necessary to audit the design (see clause 6).
