ISO 20056-1-2017 PDF
Name in English:
St ISO 20056-1-2017
Name in Russian:
Ст ISO 20056-1-2017
Original standard ISO 20056-1-2017 in PDF full version. Additional info + preview on request
Full title and description
ISO 20056-1:2017 — Rolling bearings — Load ratings for hybrid bearings with rolling elements made of ceramic — Part 1: Dynamic load ratings. This part specifies methods for calculating the basic dynamic load ratings for hybrid rolling bearings having hardened steel rings and silicon nitride (Si3N4) rolling elements (balls or rollers), with references to appropriate ceramic and bearing material standards.
Abstract
ISO 20056-1:2017 sets out calculation methods for dynamic load ratings of hybrid bearings (steel rings combined with silicon nitride rolling elements). It defines assumptions, material considerations and references (for example ISO 26602 and ISO 3290‑2 for balls, ISO 12297‑2 for rollers) needed to determine basic dynamic load ratings consistent with good manufacturing practice.
General information
- Status: Published (international standard; confirmed in ISO review 2023).
- Publication date: December 2017 (Edition 1; published 11 December 2017).
- Publisher: International Organization for Standardization (ISO).
- ICS / categories: 21.100.20 (Rolling bearings).
- Edition / version: Edition 1 — 2017-12.
- Number of pages: 14 pages (ISO edition).
Scope
ISO 20056-1:2017 specifies methods of calculating the basic dynamic load ratings for hybrid bearings that have bearing rings made of commonly used, high-quality hardened bearing steel and rolling elements made from silicon nitride. The document covers calculation principles for both ball and roller types and points to related material and dimensional standards that apply when using the methods.
Key topics and requirements
- Calculation procedure for basic dynamic load ratings (Cr) for hybrid bearings with Si3N4 rolling elements.
- Assumptions about bearing-ring material (hardened bearing steel) and typical manufacturing quality.
- Application-specific considerations for balls and rollers, including normative references for ceramic rolling-element specifications (ISO 26602, ISO 3290‑2 for balls; ISO 12297‑2 for rollers).
- Use of Hertzian contact parameters and factors consistent with hybrid bearing contact mechanics.
- Normative references and cross-references to related ISO bearings and ceramic material standards required to apply the calculation methods correctly.
Typical use and users
Design and application engineers, bearing manufacturers, quality engineers and tribology specialists use ISO 20056-1 when specifying or designing hybrid bearings (steel rings with ceramic rolling elements) to determine basic dynamic load ratings, assess bearing life estimates and ensure compatibility with material and manufacturing quality expectations. Maintenance planners and procurement specialists may also reference it when qualifying bearing types for specialized applications.
Related standards
ISO 20056-1 is part of a small ISO series on hybrid-bearing load ratings; the directly related Part 2 is ISO 20056-2:2017 (Static load ratings). The document also references and should be used in conjunction with ISO 26602 (silicon nitride materials), ISO 3290‑2 (ceramic balls), ISO 12297‑2 (rollers) and foundational bearing standards such as ISO 76 (static load ratings) and ISO 5593 (rolling bearings vocabulary).
Keywords
hybrid bearings, rolling bearings, dynamic load rating, silicon nitride, Si3N4, ceramic rolling elements, bearing design, Hertzian contact, ISO 20056, bearing calculations, ISO/TC 4/SC 8.
FAQ
Q: What is this standard?
A: ISO 20056-1:2017 defines calculation methods for the basic dynamic load ratings of hybrid rolling bearings that combine hardened steel rings with silicon nitride rolling elements.
Q: What does it cover?
A: It covers the formulas, assumptions and referenced material standards needed to compute dynamic (basic) load ratings for hybrid ball and roller bearings, including applicable references for ceramic material and dimensional specifications.
Q: Who typically uses it?
A: Bearing designers, mechanical engineers, manufacturers of hybrid bearings, bearing selection specialists and technical procurement or maintenance teams use the standard to specify and validate bearing load capacity and life estimates.
Q: Is it current or superseded?
A: ISO 20056-1:2017 is published and was confirmed in ISO’s periodic review (confirmed in 2023), so the 2017 edition remains current as of the latest ISO lifecycle status. Users should check ISO national bodies or the ISO catalogue for any amendments or newer editions beyond the 2023 confirmation.
Q: Is it part of a series?
A: Yes — it is Part 1 (dynamic load ratings) of the ISO 20056 series; Part 2 (ISO 20056-2:2017) covers static load ratings and is intended to be used together with Part 1.
Q: What are the key keywords?
A: Hybrid bearings, dynamic load rating, ceramic rolling elements, silicon nitride, Hertzian contact, bearing life calculation, ISO 20056.