The designation DIN 509 E 0.6 x 0.2 refers to a specific type of undercut (Freistich) used in mechanical engineering and technical drawing.
These undercuts are standardized features designed to allow mating parts to sit flush against a shoulder or to provide clearance for grinding tools. Understanding the Code
The alphanumeric string follows the German Institute for Standardization (DIN) format:
DIN 509: The standard governing undercuts for turned parts and bores.
Form E: Specifies a radial undercut. This is typically used when the cylindrical surface needs to be ground, but the face of the shoulder does not. 0.6: The radius ( ) of the undercut in millimeters. 0.2: The depth ( ) of the undercut in millimeters. Technical Specifications
For a DIN 509 E 0.6 x 0.2, the standard defines the following dimensions: Radius ( ): Depth ( ): Total Width ( ): Usually (approximate space required on the shaft). Angle: Typically 15∘15 raised to the composed with power for the transition back to the shaft diameter. Why Use an Undercut?
📍 Precision FitIt removes the small "fillet" left by cutting tools. This ensures a sharp corner so a bearing or washer can slide completely against the shoulder.
📍 Grinding ClearanceIf a shaft needs to be ground to a high tolerance, the undercut provides a "run-out" zone for the grinding wheel. This prevents the wheel from hitting the shoulder and causing damage. din 509e06x02 exclusive
📍 Stress ReductionBy providing a smooth, rounded transition, it helps distribute mechanical stress, reducing the risk of cracks at the corner of the shaft. Application Tip
When specifying this on a technical drawing, it is often called out using a leader line pointing to the corner:"Undercut DIN 509 – E 0.6 x 0.2"
If you are looking for a 3D model or a CAD block for this specific undercut, let me know! I can also provide the dimensions for Form F (which covers both the shaft and the shoulder face) if that fits your design better.
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This article is for informational purposes. Always consult the latest DIN EN ISO standards and your specific supplier’s technical data sheet before specifying proprietary coatings. The designation DIN 509 E 0
The designation DIN 509 E 0.6 x 0.2 refers to a specific type of relief groove (also called an undercut) used in mechanical engineering for turned parts and bores. These grooves provide clearance for subsequent machining tools (like grinding wheels) and ensure mating parts can sit flush against a shoulder. Specification Details
According to the DIN 509 standard, the "E 0.6 x 0.2" designation breaks down as follows:
Type E: A relief groove used when only the cylindrical surface (the shaft) requires further machining, and no high fatigue load is expected on the planar shoulder. 0.6 (Radius ): The radius of the undercut profile is 0.6 mm. 0.2 (Depth ): The radial depth of the groove is 0.2 mm. Technical Dimensions
For this specific size, the standard typically specifies the following additional dimensions to ensure proper tool clearance: Value (mm) Radius Depth Breadth (Width) Run-out Angle 15° (Standard for Type E) Application Guidelines Workpiece Diameter (
): This specific groove size is generally recommended for workpieces with diameters over 10 mm up to 18 mm.
Surface Finish: Standard roughness for these surfaces is typically ), though tighter tolerances like can be specified in the drawing.
Usage: It is ideal for parts where the mating component has a large counterbore or will not contact the planar shoulder. Bright nickel with sulfur-containing organics
For further technical documentation, you can refer to detailed guides on Scribd or engineering reference sites like Engineers Edge. Din 509-Relief Grooves | PDF | Machining - Scribd
Dimensions in mm. Corresponding diameter d1 b. Type ±0,1 g workpieces. +0,1 +0,05 +0,2 subjected to subjected to higher. Din 509-Relief Grooves | PDF | Machining - Scribd
I’ll assume you mean the German standard DIN 509E06X02 (likely a part or variant); I’ll produce a concise, structured report summarizing scope, key requirements, typical applications, inspection/test methods, and compliance steps. If you meant a different standard or need a specific clause, say so.
At first glance, 6µm (0.00024 inches) seems impossibly thin. But in electroplating, thickness is a balance between cost, function, and adhesion.
Because this is a thin, high-performance code, you will not find it on ship anchors or bridge girders. Instead, look for it in these engineered niches:
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In regulated markets, internal trigger mechanisms require thin rust prevention without changing the part's functional geometry (sear engagement surfaces). DIN 509E06X02 exclusive offers a dry-film lubricant that prevents carbon fouling adhesion.