ISO 16123:2025

Ships and marine technology — Marine cranes — Slewing bearings

This document provides requirements on the classification, designation, inspection, testing method, marking, packaging, transportation, storage, installation and maintenance of slewing bearings for marine cranes. This document is applicable to the design, manufacture and acceptance of slewing bearings for marine cranes at an ambient temperature not lower than −40 °C.

Navires et technologie maritime — Grues marines — Supports d’orientation

General Information

• Status: Published
• Publication Date: 23-Mar-2025
• ICS: 47.020.40 - Lifting and cargo handling equipment
• Technical Committee: ISO/TC 8/SC 4 - Outfitting and deck machinery
• Drafting Committee: ISO/TC 8/SC 4 - Outfitting and deck machinery
• Current Stage: 6060 - International Standard published
• Start Date: 24-Mar-2025
• Due Date: 24-Mar-2025
• Completion Date: 24-Mar-2025

Standards Content (Sample)

International
Standard
ISO 16123
First edition
Ships and marine technology —
2025-03
Marine cranes — Slewing bearings
Navires et technologie maritime — Grues marines — Supports
d’orientation
Reference number
© ISO 2025
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
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or ISO’s member body in the country of the requester.
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Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Classification and designation . 2
4.1 Composition and structure .2
4.2 Designation .3
5 Technical requirements . 4
5.1 Load ratings .4
5.2 Rolling element .4
5.3 Bearing rings .5
5.4 Cage/separator .6
5.5 Sealing ring .6
5.6 Oil cup .6
5.7 Gears of the bearing ring .6
5.8 Residual magnetism limit of the bearing .7
5.9 Accuracy of the slewing bearing .8
5.10 Lubrication .10
5.11 Other requirements .10
6 Inspection requirements . 10
6.1 Inspection items .10
7 Inspection method .11
7.1 Materials .11
7.2 Hardness .11
7.3 Surface cracks of raceway .11
7.4 Ultrasonic testing of bearing rings .11
7.5 Impact energy of bearing ring material .11
7.6 Effective depth of hardening of raceway quenching, D .11
S
7.7 Width of soft zone of raceway quenching .11
7.8 Appearance quality .11
7.9 Dimensional tolerance .11
7.10 Rotation accuracy . 12
7.11 Gear accuracy . 12
7.12 Clearance . 13
7.13 Rotation . 13
8 Marking, packaging, transportation and storage .13
8.1 Marking . 13
8.2 Packaging . 13
8.3 Transportation and storage . 13
9 Installation and maintenance . . 14
Annex A (informative) Installation and maintenance of slewing bearing .15
Bibliography . 17

iii
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
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with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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This document was prepared by Technical Committee ISO/TC 8, Ships and marine technology, Subcommittee
SC 4, Outfitting and deck machinery.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

iv
International Standard ISO 16123:2025(en)
Ships and marine technology — Marine cranes — Slewing
bearings
1 Scope
This document provides requirements on the classification, designation, inspection, testing method, marking,
packaging, transportation, storage, installation and maintenance of slewing bearings for marine cranes.
This document is applicable to the design, manufacture and acceptance of slewing bearings for marine
cranes at an ambient temperature not lower than −40 °C.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 54, Cylindrical gears for general engineering and for heavy engineering — Modules
ISO 683-2, Heat-treatable steels, alloy steels and free-cutting steels — Part 2: Alloy steels for quenching and
tempering
ISO 683-17, Heat-treatable steels, alloy steels and free-cutting steels — Part 17: Ball and roller bearing steels
ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel — Part 1: Bolts, screws and
studs with specified property classes — Coarse thread and fine pitch thread
ISO 898-2, Fasteners — Mechanical properties of fasteners made of carbon steel and alloy steel — Part 2: Nuts
with specified property classes
ISO 1122-1, Vocabulary of gear terms — Part 1: Definitions related to geometry
ISO 1132-1, Rolling bearings — Tolerances — Part 1: Terms and definitions
ISO 1328-1, Cylindrical gears — ISO system of flank tolerance classification — Part 1: Definitions and allowable
values of deviations relevant to flanks of gear teeth
ISO 1328-2, Cylindrical gears — ISO system of flank tolerance classification — Part 2: Definitions and allowable
values of double flank radial composite deviations
ISO 3290-1, Rolling bearings — Balls — Part 1: Steel balls
ISO 3452-2, Non-destructive testing — Penetrant testing — Part 2: Testing of penetrant materials
ISO 5593, Rolling bearings — Vocabulary
ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method
ISO 9712, Non-destructive testing — Qualification and certification of NDT personnel
ISO 9934 (all parts), Non-destructive testing — Magnetic particle testing
ISO/TR 10064-2:1996, Code of inspection
...