Our gearwheel calculation program – available to download free of charge from GROB AG.

We are pleased to be able to offer you a program for calculating gearwheels. The goal of this program is to help in defining transmission ratios and optimising existing pairings. We use the program every day and can wholeheartedly recommend it from a professional perspective.

The program can be used to design the geometry including data important to machining. In other words, the number of teeth and the base tangent length of helical and spur-toothed cylindrical gears, with or without profile correction, are measured.

Moreover, the profile and breaking strength are also identified. The possible tooth profile clearance together with the tolerances, including the concentricity and run-out tolerances, are also expressed.

These calculations are based on the generally recognised fundamentals.

The program is available to download free of charge.

Rafael Fellmann

Rafael Fellmann
Managing Director / Sales / Consulting

+41 (0)62 748 55 14


We have tried to make the program as user-friendly as possible.

When you use the program, we recommend that you hit F1 at any time for help. By doing so, you will quickly become confident and sure of yourself when using the application.

Calculating internal toothing

The internal toothing can also be calculated. Simply put a minus sign in front of the number of teeth. The tolerances are also indicated with a minus sign but must be written with a plus sign in the diagram.

Please note

You will also notice the green button at the bottom right. If the button turns red, an explanation is displayed on the left-hand side enabling you to make the necessary corrections.

When you have finished, you should always select "Ausgabe" and activate "Resultate berechnen". In this way you can be sure the program calculates all the entries correctly.

Zahnradberechnungsprogramm herunterladen