509e06x02 Exclusive __full__ — Din

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The designation DIN 509 E 0,6 x 0,2 refers to a specific type of relief groove (undercut)

. This standard defines the geometry of undercuts used to provide clearance for subsequent machining or assembly on turned parts and in bores. Technical Breakdown din 509e06x02 exclusive

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

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The profile is an elegant engineering solution to a universal manufacturing problem. By standardizing the relief groove down to a tenth of a millimeter, it guarantees: Corresponding diameter d1 b

The technical designation represents a highly specific, standardized machining relief groove (undercut) featuring a 0.6 mm radius ( ) and a 0.2 mm depth (

DIN 509 defines four specific geometric configurations for relief grooves, known as Forms E, F, G, and H. The designation "E" refers specifically to the radial undercut . Unlike other forms that combine axial and radial cuts for grinding vertical walls, Form E is designed exclusively for cylindrical surfaces where only the lateral (outer) surface requires further processing. Think of a shaft that needs to be slid into a bearing or a hydraulic piston. The "E" undercut creates a rounded transition at the base of the shoulder, eliminating a sharp 90-degree corner which would otherwise act as a stress riser, potentially leading to metal fatigue and failure.

: When a bearing, collar, or gear is pressed onto a stepped shaft, any residual radius or burr at the shoulder corner will stop the component from sliding completely flush against the face. The 0.2 mm depth provides empty space for a clean, perpendicular fit. Manufacturing and Tooling Considerations

When a mating component—such as a bearing, washer, or gear—is pressed onto a shaft, it must sit entirely flush against the locating shoulder. If a radius or burr remains at the corner, the mating part will stall prematurely. The E0.6x0.2 groove completely clears out that corner space, guaranteeing perfect axial seating.