tst 11706

TST 11706 is a technical drawing standard focused on relief grooves, i.e. the small relief features used in manufacturing and machine-part drawings to define local transitions at shoulders, steps, and similar geometry changes. These details matter because they help communicate how a part should be finished and interpreted on the drawing, reducing ambiguity during production. Its reference basis in DIN 509:2006 and DIN 616:2000 places it in the established drafting terminology used for mechanical components.

What a relief groove means in drafting practice

In general technical practice, relief grooves are local geometric features that make machining, grinding, or fit definition easier at sharp transitions. They are often seen on shafts, shoulders, and non-working edges where tooling access, edge run-out, or controlled clearance must be made explicit. This standard addresses how that feature is named and treated in the language of technical drawings, rather than a broader manufacturing method.

Why this terminology matters

• It reduces variation in how the same feature is described on drawings.
• It improves clarity in transition zones that are otherwise easy to misread.
• It supports consistent communication in machine-element documentation.
• It aligns the drawing vocabulary with established DIN-based references.