DIN 5480 uses a dual-tolerance system to account for geometric deviations like pitch errors, profile errors, and helix deviations:
) : The scaling factor of the tooth size. Standard modules range from 0.5 to 10. : The total count of splines around the circumference. Pressure Angle ( ) : Fixed at 30° for all DIN 5480 splines. Reference Diameter ( ) : Calculated as: d=m×zd equals m cross z Base Diameter ( ) : The diameter from which the involute curve is generated:
DIN 5480 is a German standard (Deutsches Institut für Normung) that defines the specifications for . These splines are widely used in machine construction, automotive, and heavy machinery to transfer high torque between shafts and hub components.
For practical verification in a workshop, engineers use measurement over balls (or pins). A verified PDF provides the formula or constant values (M1 and M2) for calculating the measurement over 2 balls (internal) or 3 wires (external) according to DIN 5480-2. din 5480 spline dimensions pdf verified
for a module/tooth count you have.
For more information on spline types, including the differences between involute and straight-sided, consult the Chamol Gear guide .
is the tolerance quality (5–12); f is the deviation (fit type). Key Geometry and Calculations DIN 5480 uses a dual-tolerance system to account
Module 1.5, 26 teeth, Class 8f.
DIN 5480 is almost always , meaning the teeth transmit the torque and align the parts simultaneously.
): Dictates the size of the tooth. Standard modules range from 0.5 to 10. Pressure Angle ( ) : Fixed at 30° for all DIN 5480 splines
Measured across pins or balls using micrometers. It dictates the physical material left on the tooth.
: Covers general principles, symbols, and the structure of the tolerance system.