General principles, symbols, and preferred series of modules.

that remain independent of the module, offering a flexible approach to shaft-to-hub connections. 1. Purpose and Engineering Role

For American engineers, the American National Standards Institute resells DIN standards.

A: No. For 45° involute splines, refer to ANSI B92.1 or ISO 4156 (which includes 45°).

: These are used to determine the spline's geometry, ensuring the shaft or hub can easily fit with other standardized components.