W denotes a "Welle" (Shaft/External spline); N denotes a "Nabe" (Hub/Internal spline). Reference Diameter: Module ( ): Number of Teeth ( ): Tolerance Class: Comparison with Other Standards
These differ based on whether you are looking at the shaft (External) or the hub (Internal). din 5480 spline dimensions pdf
DIN 5480 standard defines involute splines based on reference diameters ( d sub cap B ) that are independent of the module ( ). It is strictly limited to splines with a 30 raised to the composed with power pressure angle Doppler Gear Key Dimensioning Parameters When reading a DIN 5480 specification (e.g., DIN 5480 W 120 x 3 x 38 x 8f ), the dimensions are broken down as follows: : Indicates the type of spline. stands for "Welle" (Shaft/External) and stands for "Nabe" (Hub/Internal). Reference Diameter ( d sub cap B : The first number (e.g., : The second number (e.g., ), which determines the tooth size. Number of Teeth ( : The third number (e.g., Tolerance Class : The final alphanumeric code (e.g., Reference PDFs and Technical Resources W denotes a "Welle" (Shaft/External spline); N denotes