) where the first number is the nominal diameter and the second is the number of teeth. GWJ eAssistant Essential Calculation Parameters
Input these values into a to find the original theoretical dimensions before wear occurred. ✅ Summary of DIN 5482 Calculations
DIN 5482 is a withdrawn German standard for involute splines with a 30° pressure angle . While officially replaced by
The ratio of the pitch diameter to the number of teeth (e.g., 1.5, 2, 3).
Determines the fit (e.g., loose, standard, or close) and backlash requirements, typically ranging from precision grades IT5 to IT10. Key Dimensional Formulas Din 5482 Spline Dimensions - sciphilconf.berkeley.edu din 5482 spline dimensions calculator
) is required to determine the exact tooth thickness modification. This ensures the teeth have the proper addendum and dedendum heights to avoid binding during engagement. 5. Tolerances and Space Width Adjustments
Calculated from the difference between the tip and root diameters Span Width / Measurement over Pins:
There is no single value. It depends on length of engagement, material, and lubrication. The calculator can estimate based on root diameter shear area.
Despite being obsolete, DIN 5482 has an immense installed base, and is still widely encountered in: ) where the first number is the nominal
Crucially, it is a "legacy standard" from traditional mechanics, today its use is restricted to , as clearly stated in the standard itself. For new designs, the modern standard DIN 5480 has been recommended since 2006. As a result, the original standard is not commercially available, and its content is protected under international copyright laws.
In mechanical engineering, internal and external splined joints are critical for transmitting high torque while maintaining axial alignment. Among the various legacy standards, remains widely referenced in European machinery, automotive drivetrains, and hydraulic pump interfaces.
) : The tip diameter of the hub teeth (the bore size before broaching/shaping). 3. Standard Dimension Reference Table
When calculating, the process involves selecting the appropriate size and tolerance from standard DIN 5482 tables. 1. Identify Inputs Select the size ( Define the tolerance zone for the shaft (e.g., ) and hub (e.g., H11cap H 11 2. Determine Diameters While officially replaced by The ratio of the
Dx≈1.732×mcap D sub x is approximately equal to 1.732 cross m
: The ratio of the pitch diameter to the number of teeth. Pitch Diameter (dp) : The diameter where the teeth engage. Tip Diameter (d2) : The outer diameter for external splines. Root Diameter (dr) : The base diameter of the tooth space. Software and Calculators
About the author: This guide was written by a mechanical engineer with 15 years of experience in power transmission design, including DIN and ISO standardized spline joints.
Unlike modern standards that use module and number of teeth as the primary defining factors, DIN 5482 identifies splines using a combination of the approximate nominal diameter ( ) and the module ( The fundamental geometry relies on these core variables: Module (