DIN 5480 is the German standard for involute splines with a 30° pressure angle, widely used in the automotive, hydraulic, and aerospace industries. Unlike many other standards, DIN 5480 is based on reference diameters that are independent of the module, allowing for easy integration with standard bearing sizes. Key Components of DIN 5480
The standard is divided into several parts, with DIN 5480-1 serving as the foundation for principles and basic rack profiles. Pressure Angle: Strictly 30°. Module (m): Range from 0.5 to 10 mm. Number of Teeth (z): Range from 6 to 82 teeth.
Centering: Usually flank-centered, where the tooth flanks transmit torque and center the shaft and hub. Decoding the Designation
A typical DIN 5480 callout, such as DIN 5480 – W 120 x 3 x 38 x 8f, contains specific data points: Description W / N Shaft / Hub
"W" (Welle) for external shaft; "N" (Nabe) for internal hub. 120 Reference Diameter ( dBd sub cap B The nominal size, often matching a bearing bore. 3 The size of the teeth. 38 Number of Teeth ( Total count of teeth around the circumference. 8f Tolerance & Fit
8 is the tolerance class (5–12); f is the deviation (lower case for shafts, upper case for hubs). Fundamental Dimension Formulas Calculations for DIN 5480 involve profile shifts (
) to ensure the spline fits the specified reference diameter. Din 5480-1 | PDF - Scribd
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
. 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
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 spline dimensions pdf
DIN 5480 is the German standard for involute splines based on reference diameters. Unlike other standards that use the pitch diameter as a starting point, DIN 5480 centers the design on the outside diameter of the shaft, making it easier to match with standard bearings and seals.
If you are looking for a DIN 5480 spline dimensions PDF, this article breaks down the essential geometry, calculation formulas, and tolerance classes you need to understand. The Logic of DIN 5480 Naming
The designation of a DIN 5480 spline follows a specific string of characters. Understanding this is key to reading any dimension table. Example: DIN 5480 - N 40 x 2 x 18 x 9H
N or W: "N" stands for a hub (internal), and "W" stands for a shaft (external). 40: The reference diameter ( 2: The module ( ), which determines the tooth size. 18: The number of teeth ( 9H: The tolerance class (standard fit). Core Geometry and Formulas
To calculate the dimensions found in a PDF table, you can use these fundamental formulas based on a 30° pressure angle. Reference Diameter ( ): Base Diameter ( ): Pitch ( ): Circular Tooth Thickness ( ): Key Dimension Table for Common Modules
The following values represent nominal dimensions before tolerances are applied. Reference Dia ( Number of Teeth ( Shaft Major Dia ( da1d sub a 1 end-sub Hub Minor Dia ( di2d sub i 2 end-sub Tolerance Classes and Fits
DIN 5480 uses a system of letters and numbers to define the "fit" between the shaft and hub.
Effective vs. Actual: The standard accounts for "effective" thickness, which includes deviations in lead, profile, and pitch. Standard Classes:
9H/9g: The most common "sliding fit" for general engineering.
7H/7g: A precision fit for high-speed or high-torque applications. Position Letters: H: Standard for internal splines (hubs).
f, g, h: Common for external splines (shafts) to provide different levels of clearance. Measurement Between Pins (MDK/MDS)
Because you cannot easily measure the pitch diameter with a caliper, DIN 5480 dimensions PDFs focus on "Measurement Over Pins" for shafts and "Between Pins" for hubs. Shaft ( Macap M sub a
): Two pins are placed in opposite tooth spaces; the distance over the outside of the pins is measured. Hub ( Micap M sub i
): Two pins are placed in opposite spaces; the distance between the inside of the pins is measured. The diameter of the measuring pin ( Decap D sub e ) is typically for most standard DIN 5480 calculations. Why Use DIN 5480 Over Other Standards? DIN 5480 is the German standard for involute
Self-Centering: The 30° pressure angle provides excellent centering under load.
High Strength: The involute curve reduces stress concentrations at the root.
Bearing Compatibility: Since it is based on reference diameters, the shaft ends often match standard metric ball bearing IDs perfectly.
💡 Tip: When downloading a PDF, ensure it specifies whether it covers the flat root or fillet root version, as this changes the root diameter and strength profile. AI responses may include mistakes. Learn more
After creating your piece:
For day‑to‑day use, download the concise DIN 5480 dimension summary from a reputable manufacturer like Grob or SDP/SI (free, no login). For precision engineering, buy the official DIN 5480‑1:2006‑03 PDF from Beuth.
Need a quick lookup? Bookmark this post or save the manufacturer PDFs – they’ll save you hours of searching.
Have a specific module or tooth count you’re working with? Drop a comment below (or ask your engineering team) – I’m happy to help parse the dimension tables.
DIN 5480 is the German engineering standard for involute splines based on reference diameters. Unlike other standards that rely on the module or pitch to define sizing, DIN 5480 uses the reference diameter (
) as the core sizing constant, which makes it highly adaptable for various shaft and hub applications. Core Technical Specifications The standard is strictly limited to splines with a 30∘30 raised to the composed with power pressure angle. Key dimensional components include: Reference Diameter ( ): The primary identifier in the designation string.
Pitch, Major, and Minor Diameters: Essential for calculating clearance and interference.
Tolerances and Fits: DIN 5480 provides specific classes (e.g., 8f, 9H) to ensure precise alignment and torque transmission. Understanding the Designation String
A typical DIN 5480 callout follows a specific format that defines its geometry. For example, DIN 5480 W is decoded as:
Type: 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 Documentation After creating your piece:
While often compared to global standards, DIN 5480 is not interchangeable with:
ISO 4156: International standard for straight cylindrical involute splines.
ANSI B92.2M: The American metric standard for involute splines. Application and Manufacturing
These splines are preferred for heavy-duty components requiring high torque transmission and precise centering. In modern CAD environments like SOLIDWORKS or AutoCAD, these dimensions are used to generate accurate 3D models for machining and interference checking.
For a deep dive into tolerance tables and specific fit calculations, technical guides from Doppler Gear and tutorials on GrabCAD offer practical implementation details. din 5480 spline dimensions
A very specific request!
DIN 5480 is a German standard for splines, which are used to transmit rotational motion and torque between two shafts. Here is a helpful feature to extract and summarize the key dimensions for DIN 5480 spline:
DIN 5480 Spline Dimensions:
The standard defines several types of splines, including:
Here are the key dimensions for each type:
In the world of mechanical engineering, connecting a shaft to a hub requires precision, strength, and reliability. While keyed connections are common, they often fall short when dealing with high torque or dynamic loads. Enter the involute spline—a robust solution standardized under DIN 5480.
If you have ever searched for "DIN 5480 spline dimensions PDF," you know that interpreting the raw standard tables can be daunting. This article breaks down the essential dimensions, calculations, and notations defined in DIN 5480, helping you select the right spline for your application without getting lost in the data.
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 specifies tolerance classes (e.g., h, js) and flank clearance to control backlash and load distribution. Fits range from sliding (clearance) to interference types for press fits. The standard includes permissible deviations for flank form, lead, and runout.
This is the theoretical diameter where the tooth thickness equals the space width. $$d = m \times z$$