NF ISO 17485

NF ISO 17485

October 2006
Standard Current

Bevel gears - ISO system of accuracy

ISO 17485:2006 establishes a classification system that can be used to communicate geometrical accuracy specifications of unassembled bevel gears, hypoid gears, and gear pairs. It defines gear tooth accuracy terms, and specifies the structure of the gear accuracy grade system and allowable values. ISO 17485:2006 provides the gear manufacturer and the gear buyer with a mutually advantageous reference for uniform tolerances. Ten accuracy grades are defined, numbered 2 to 11 in order of decreasing precision. ISO 17485:2006 does not apply to enclosed gear unit assemblies, including speed reducers or increasers, gear motors, shaft mounted reducers, high speed units, or other enclosed gear units manufactured for a given power, speed, ratio or application. Gear design is beyond the scope of ISO 17485:2006. The use of the accuracy grades for the determination of gear performance requires extensive experience with specific applications. Therefore, the users of this International Standard are cautioned against the direct application of tolerance values to a projected performance of unassembled (loose) gears when they are assembled.

See more
View the extract
Main informations

Collections

National standards and national normative documents

Publication date

October 2006

Number of pages

41 p.

Reference

NF ISO 17485

ICS Codes

21.200   Gears

Classification index

E23-039

Print number

1 - 04/10/2006

International kinship

ISO 17485:2006
Sumary
Bevel gears - ISO system of accuracy

ISO 17485:2006 establishes a classification system that can be used to communicate geometrical accuracy specifications of unassembled bevel gears, hypoid gears, and gear pairs. It defines gear tooth accuracy terms, and specifies the structure of the gear accuracy grade system and allowable values.

ISO 17485:2006 provides the gear manufacturer and the gear buyer with a mutually advantageous reference for uniform tolerances. Ten accuracy grades are defined, numbered 2 to 11 in order of decreasing precision.

ISO 17485:2006 does not apply to enclosed gear unit assemblies, including speed reducers or increasers, gear motors, shaft mounted reducers, high speed units, or other enclosed gear units manufactured for a given power, speed, ratio or application.

Gear design is beyond the scope of ISO 17485:2006. The use of the accuracy grades for the determination of gear performance requires extensive experience with specific applications. Therefore, the users of this International Standard are cautioned against the direct application of tolerance values to a projected performance of unassembled (loose) gears when they are assembled.

Table of contents
View the extract
  • Avant-propos
    iv
  • Introduction
    v
  • 1 Domaine d'application
    1
  • 2 Références normatives
    2
  • 3 Termes, définitions et symboles
    2
  • 3.1 Termes et définitions
    2
  • 3.2 Termes et symboles fondamentaux
    6
  • 4 Application du système de classement
    7
  • 4.1 Généralités
    7
  • 4.2 Classification de la classe d'exactitude
    7
  • 4.3 Sens de tolérance
    8
  • 4.4 Caractéristiques additionnelles
    8
  • 5 Tolérances
    8
  • 5.1 Valeurs de tolérance
    8
  • 5.2 Raison de la progression
    9
  • 5.3 Règles d'arrondissage
    9
  • 5.4 Équations relatives aux tolérances
    9
  • 6 Application des méthodes de mesure
    11
  • 6.1 Méthodes de mesure
    11
  • 6.2 Méthodes recommandées de contrôle de mesure
    12
  • 6.3 Filtrage des données de mesure
    12
  • 6.4 Vérification de la marque de portée de la dent
    13
  • Annexe A (informative) Exemple de tables de tolérances
    15
  • Annexe B (informative) Méthode de mesure relative aux écarts composés d'un flanc simple
    17
  • Annexe C (informative) Exactitude des roues coniques de petit module
    23
  • Annexe D (informative) Interprétation des données composées
    26
  • Bibliographie
    35
ZOOM ON ... the Requirements department
To comply with a standard, you need to quickly understand its issues in order to determine its impact on your activity.

The Requirements department helps you quickly locate within the normative text:
- mandatory clauses to satisfy,
- non-essential but useful clauses to know, such as permissions and recommendations.

The identification of these types of clauses is based on the document “ISO / IEC Directives, Part 2 - Principles and rules of structure and drafting of ISO documents ”as well as on a constantly enriched list of verbal forms.

With Requirements, quickly access the main part of the normative text!

With Requirements, quickly access the main part of the normative text!
Need to identify, monitor and decipher standards?

COBAZ is the simple and effective solution to meet the normative needs related to your activity, in France and abroad.

Available by subscription, CObaz is THE modular solution to compose according to your needs today and tomorrow. Quickly discover CObaz!

Request your free, no-obligation live demo

I discover COBAZ