DIN 5480 is the German industrial standard for involute splines based on reference diameters. It defines the geometry, dimensions, and tolerances for spline joints where the teeth have an involute profile, similar to gear teeth, ensuring high torque transmission and self-centering capabilities. Core Technical Specifications Pressure Angle: Strictly limited to 30°.
Geometry: Unlike other standards, DIN 5480 is based on reference diameters that are independent of the module (
Interchangeability: It is not interchangeable with ANSI B92.2M or ISO 4156 standards.
Fit Types: Often uses the "side fit" (flank centered) system where the splines contact on the tooth flanks. Key Design Parameters
According to the standard, several variables must be calculated or selected from tables to define a spline: Module ( ): Standard modules range from 0.5 to 10. Number of Teeth ( ): Determined by the reference diameter and module. Tooth Depth: Defined by the addendum ( ) and dedendum (
Tolerances: Standard tolerance classes (e.g., 6H for hubs, 7f for shafts) define the backlash and fit. Documentation and PDF Resources
The DIN 5480 series consists of multiple parts (DIN 5480-1 to DIN 5480-16). Comprehensive data is typically found in: DIN 5480-1: Covers basic principles and geometry. Din 5480 Pdf
Technical Guides: Manufacturers like Doppler Gear provide decoders to help interpret standard callouts (e.g.,
Scribd & Online Libraries: Many detailed PDF copies and summaries are hosted on platforms like Scribd and Kadkraft, which include measurement tables for tooth thickness and base tangent lengths.
) or help with calculating the dimensions for a custom size? AI responses may include mistakes. Learn more Din 5480 PDF - Scribd Din 5480 PDF | PDF. Din 5480 | PDF - Scribd
Din 5480 * Basic Spline Parameters. * Spline Geometry. * Standard Spline Sizes and Profiles. * Involute Spline Joints. Doppler Gear TechBit: DIN 5480 Spline Decoder
The standard defines five tolerance classes for side fit: 4, 5, 6, 7, 8 (4 = tightest, 8 = loosest). These are combined with a letter:
| Symbol | Application | Typical Use | |--------|-------------|--------------| | 4H | Internal, very tight | Precision indexing, aerospace | | 6H | Internal, standard | General machinery, pumps | | 8f | External, standard | Automotive driveshafts | | 9H | Internal, loose | Sliding connections, clutches | DIN 5480 is the German industrial standard for
📄 The PDF contains tables for major diameters, minor diameters, and form diameter limits for each tolerance class. You cannot guess these – they are calculated per module and tooth count.
If you cannot access a full DIN 5480 PDF, you can use the following simplified formulas (always verify with official data for precision work):
Over-pins measurement: For external spline, measure over two pins of diameter d(_P) = 1.8×m (for m ≥ 2). The measurement M(_R) = d(_B) × cos α / cos α(_M) + d(_P), where α(_M) is involute function.
Important copyright notice: DIN standards are protected intellectual property. While many websites offer free “DIN 5480 PDF downloads,” these are often outdated, incomplete, or pirated. Using unofficial copies can lead to manufacturing errors and legal liability.
A: No. For 45° involute splines, refer to ANSI B92.1 or ISO 4156 (which includes 45°).
If you are downloading a DIN 5480 PDF today, you must check the date of publication. H – Internal spline, basic deviation zero (hub)
Historically, DIN 5480 was the go-to standard. However, in recent years, international harmonization has occurred.
The ISO standard uses slightly different calculation methods for fit and tolerance. While the physical tools (hobs and shapers) often remain the same, the inspection data in a DIN 5480-2 PDF might not perfectly align with an ISO 4156 chart. Always ensure your PDF matches the revision listed on your engineering drawing.
DIN 5480 is a long-standing German industrial standard that defines involute splines with parallel-sided teeth for shaft-hub connections. It’s a practical, engineering-focused specification used widely in mechanical design where torque transmission, repeatable alignment, and easy assembly/disassembly are required. Below is a concise, engaging review that covers what the standard is, why it matters, what you’ll find in a DIN 5480 PDF, and practical tips for engineers and students.
Let’s assume you have opened a DIN 5480 PDF and turned to the table for module 2, 30° pressure angle. Here’s how to read it for shaft (external) and hub (internal):
| Teeth (z) | Reference Diameter (d(_B)) | Major Diameter ext. (d(_ae)) | Minor Diameter int. (d(_ii)) | Root diameter ext. (d(_fe)) | |-----------|----------------|-----------------------------|-----------------------------|----------------------------| | 21 | 42.0 mm | 46.000 mm | 38.000 mm | 36.800 mm | | 24 | 48.0 mm | 52.000 mm | 44.000 mm | 42.800 mm | | 30 | 60.0 mm | 64.000 mm | 56.000 mm | 54.800 mm |
Key takeaway: The reference diameter (d(_B)) = module × number of teeth (m × z). All other diameters are derived using formulas provided in the standard’s text.