Online Calculator Inverse Involute

For many calculations – e.g. to determine the dimension over two balls from the tooth thickness – it is necessary to transform involute alpha to the pressure angle. The required function is non-reversible. Therefore, the pressure angle can only be calculated approximately. That is what this tool does.

Type in the value for the involute alpha (in radians) and the corresponding pressure angle will be calculated.

Involute Alpha (rad):