DIN 874-3-2008 PDF

Full title and description

STB DIN 874-3-2008 — Geometrical product specifications (GPS) - Straight edges - Part 3: Granite straight edges; dimensions, technical delivery conditions. The document specifies dimensional series, designation, material and workmanship requirements, tolerance classes and test/inspection provisions for flat granite straight edges (flachlineale aus Naturhartgestein).

Abstract

DIN 874-3:2008 defines requirements and technical delivery conditions for granite straight edges used as length/geometry references in precision measurement and machine set-up. It covers key metrological characteristics (flatness, parallelism), reference climate, material quality and measurement procedures needed to prove conformity with the specification. The standard is published in German and is included in DIN reference listings for GPS straight edges.

General information

• Status: Current / Active.
• Publication date: 01 January 2008 (edition 2008-01).
• Publisher: Deutsches Institut für Normung (DIN) — German Institute for Standardisation.
• ICS / categories: 17.040.40 (Geometrical product specification — GPS / straightness and related gauges).
• Edition / version: DIN 874-3:2008-01 (replacing earlier 2006 text versions).
• Number of pages: 6 pages.

(General bibliographic details consolidated from DIN catalogue and standards distributors.)

Scope

Applies to flat straight edges and 90° flat squares made from natural hard rock (granite) produced in defined nominal lengths (commonly up to 2000 mm). The standard specifies dimensional series and designation, two high-precision tolerance classes, requirements for the reference climate for measurement, acceptable form- and position-tolerances (notably flatness and parallelism), edge drop (randabfall), material selection and surface finish, plus methods for testing and proving conformity. It is intended for suppliers, purchasers and calibration/inspection laboratories dealing with granite straight edges.

Key topics and requirements

• Designations and nominal dimensions for granite straight edges (typical lengths and marking requirements).
• Tolerance classes and metrological characteristics — flatness tolerance t[1] and parallelism tolerance t[2] (defined per length and class).
• Reference climate and environmental conditions for calibration and inspection (specified measurement conditions).
• Material and workmanship — natural hard rock (granite), surface finish and resistance properties; prevention of damage and wear on measuring faces.
• Edge drop (Randabfall) and permissible deviations at ends/edges.
• Inspection and test procedures — measurement of flatness and parallelism and rules for demonstrating conformity with the standard.

These topics form the normative content used to manufacture, accept and certify granite straight edges for precision metrology applications.

Typical use and users

Granite straight edges specified by DIN 874-3 are commonly used by calibration and metrology laboratories, inspection and quality departments, machine tool manufacturers and users of coordinate measuring machines (CMMs) for machine alignment, verification of machine geometry and as angle/flatness reference standards. They are also used as right-angle normals on surface plates and in workshop inspection where high wear resistance and dimensional stability are required.

Related standards

Part of the DIN 874 series for straight edges; closely related standards include DIN 874-1 (steel straight edges — dimensions and delivery conditions) and DIN 874-2 (knife-edge straight edges). Additional related GPS and metrology standards include DIN 875 (squares/angles), DIN 876 (surface plates — granite and cast iron variants) and general GPS documents such as ISO 1101 (geometrical tolerancing) which cross-reference straight-edge use and tolerancing principles. These related documents are used together when specifying, testing and applying straight edges in precision measurement contexts.

Keywords

DIN 874-3, STB DIN 874-3-2008, granite straight edge, flachlineal, natural hard rock, GPS, straight edges, flatness tolerance, parallelism, metrology, calibration, technical delivery conditions.

FAQ

Q: What is this standard?

A: DIN 874-3:2008 is the DIN standard that defines geometrical product specifications (GPS) and technical delivery conditions for granite (natural hard rock) straight edges — dimensional series, tolerance classes and inspection rules for these precision reference tools.

Q: What does it cover?

A: It covers designation, nominal sizes, material and workmanship expectations, specified tolerance classes (flatness, parallelism), reference climate for measurement, edge/drop limits and the tests required to demonstrate conformity for granite straight edges.

Q: Who typically uses it?

A: Manufacturers and suppliers of granite straight edges, calibration and metrology laboratories, quality/inspection departments, machine tool builders and users who need precise flatness/straightness and stable, wear-resistant reference edges.

Q: Is it current or superseded?

A: The 2008-01 edition (DIN 874-3:2008-01) is the published edition; standards catalogs and distributors list it as the current edition. Users should check their national standards body or DIN catalogue for any amendments or later revisions before application.

Q: Is it part of a series?

A: Yes — DIN 874 is a multi-part series for straight edges: Part 1 (steel straight edges), Part 2 (knife-edge straight edges) and Part 3 (granite straight edges). Other nearby standards (DIN 875, DIN 876) cover squares and surface plates used alongside straight edges in metrology.

Q: What are the key keywords?

A: Key keywords include granite straight edge, flachlineal, GPS, flatness, parallelism, tolerance class, reference climate, DIN 874-3, metrology, calibration, technical delivery conditions.