After creating your piece:
The standard restricts modules to specific values to reduce tooling inventory:
0.5, 0.6, 0.8, 1.0, 1.25, 1.5, 1.75, 2.0, 2.25, 2.5, 3.0, 4.0, 5.0, 6.0, 8.0, 10.0
DIN 5480 is a German standard defining involute spline connections with straight-sided (parallel) sides on the tooth flanks used for transmitting torque between shafts and hubs. It standardizes geometry, tolerances, fits, and inspection dimensions to ensure interchangeability and predictable load capacity.
Understanding the DIN 5480 standard is less about memorizing numbers and more about recognizing its unique design philosophy: the Reference Diameter d sub cap B
). Unlike other standards where the diameter is tied strictly to the gear teeth, DIN 5480 was created to make mechanical assemblies easier by matching spline diameters to standard ball and roller bearing sizes. 1. Decoding the "Name" (Designation) A typical DIN 5480 specification looks like this: DIN 5480 – W 120 x 3 x 38 x 8f : "W" (Welle) denotes a (External spline), while "N" (Nabe) denotes a (Internal spline). : This is the Reference Diameter din 5480 spline dimensions pdf
. It is not the actual physical outer diameter of the teeth, but a nominal value used for alignment.
, which determines the size of the teeth. DIN 5480 typically covers a module range of 0.5 to 10. Number of Teeth ( Tolerance Class Deviation Series
. The number (8) represents the accuracy level (5 is tight, 12 is loose), and the letter (f) denotes the fit position, such as a slip fit. 2. Core Geometry Principles If you are looking at a technical drawing or a DIN 5480 Dimensions PDF , these core constants apply: Engineering.com Pressure Angle . If you see 37.5° or 45°, you are likely looking at : DIN 5480 is primarily flank-centered
, meaning the torque-transmitting sides of the teeth also align the shaft and hub. Profile Shift (
: This is the "secret sauce" of DIN 5480. Because the reference diameter is fixed to standard bearing sizes, engineers use profile shifts to adjust the tooth geometry to fit that diameter. 3. Common Calculations for Drawings After creating your piece: The standard restricts modules
When translating these standards into a CAD model or checking a part, keep these basic formulas in mind: www.kisssoft.cz Pitch Diameter ( Addendum ( h sub a p end-sub Dedendum ( h sub f p end-sub (for hobbing) Shaft Tip Diameter ( d sub a 1 end-sub Din 5480-1 | PDF - Scribd
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
For detailed dimension tables including root diameters, tip diameters, and tooth thicknesses, you can refer to technical guides from manufacturers: Doppler Gear DIN 5480 Decoder
: A concise PDF guide explaining how to read and calculate DIN 5480 parameters. GrabCAD Tutorial on DIN 5480 Tolerances
: Provides visual context for internal and external spline fits. Doppler Gear Basic Calculation Formulas DIN 5480 is a German standard defining involute
While the full standard requires looking up specific table values for tolerances, the basic geometry follows these rules: Reference Diameter (Note: In DIN 5480, d sub cap B
is fixed, but this relationship often holds for standard tooth profiles). Pressure Angle 30 raised to the composed with power Doppler Gear Doppler Gear TechBit: DIN 5480 Spline Decoder
A DIN 5480 Spline Dimensions PDF is an indispensable tool for anyone designing or inspecting involute spline connections. Whether you need a quick reference for tooth geometry or detailed inspection data, having accurate, standard-compliant dimensions ensures reliable torque transmission and long service life.
Download a sample DIN 5480 spline dimension table (PDF) – [Link placeholder]
For a complete, legally binding standard, purchase from DIN Media GmbH.