In the world of mechanical engineering, power transmission relies on precision. When a designer needs to connect a shaft to a hub with high torque capacity and self-centering capabilities, splines are the go-to solution. Among the many global standards, DIN 5480 stands out as the premier German standard for involute splines.
If you have searched for "DIN 5480 spline dimensions pdf," you likely face one of two challenges: either you cannot find a clean, readable copy of the standard online, or you have found a PDF but are struggling to decipher its complex tables and nomenclature.
This article serves as a comprehensive guide to understanding the DIN 5480 standard, navigating its dimension tables, and accessing reliable PDF resources for your engineering projects.
| Section | Description | |---------|-------------| | Basic formulas | Calculation of reference diameter, module, and profile shift | | Tooth geometry tables | Standardized combinations of module, teeth count, and diameters | | Tolerance classes | Fit classes for precise or general applications | | Inspection data | Over pin/ball measurements, span measurements over teeth | | Material allowances | Heat treatment and finishing allowances |
Before diving into dimensions, you must understand the naming convention. A typical designation on a drawing looks like this:
DIN 5480 – W 30 x 2 x 16 x 9g
Here is what each segment means:
Below is a typical lookup format (for 30° pressure angle, flat root side fit):
| Module | Teeth (z) | Reference Dia (mm) | Tip Dia External (mm) | Root Dia External (mm) | |--------|-----------|--------------------|------------------------|-------------------------| | 2.0 | 20 | 40.0 | 42.0 | 35.0 | | 2.5 | 24 | 60.0 | 62.5 | 53.5 | | 3.0 | 30 | 90.0 | 93.0 | 81.0 |
(Full tables cover m=0.5 to 10, z=6 to 250+) din 5480 spline dimensions pdf
The creation of a DIN 5480 spline involves understanding the standard, calculating dimensions, and using CAD software to model the spline. Ensure that your final piece adheres to the specified tolerances and dimensions in the standard for accurate and functional results. Always refer to the latest version of the DIN 5480 standard for detailed specifications.
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: In the world of mechanical engineering, power transmission
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?
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. DIN 5480 – W 30 x 2 x 16 x 9g
💡 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
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:
Before you open a PDF, you must understand the naming convention. A typical DIN 5480 designation looks like this:
DIN 5480 – W 120 x 4 x 38 x 8g
Let’s decode that: