Standard No.:	GB/T 21559.2-2023
English Name:	Rolling bearings—Linear motion rolling bearings—Part 2: Static load ratings
Chinese Name:	滚动轴承 直线运动滚动支承 第2部分：额定静载荷
Chinese Classification:	J11    Rolling bearing
Professional Classification:	GB    National Standard
ICS Classification:	21.100.20 21.100.20    Rolling bearings 21.100.20
Source Content Issued by:	SAMR; SAC
Issued on:	2023-05-23
Implemented on:	2023-12-1
Status:	valid
Superseding:	GB/T 21559.2-2008 Rolling bearings - Linear motion rolling bearings - Part 2: Static load ratings
Target Language:	English
File Format:	PDF
Word Count:	8500 words
Translation Price(USD):	255.0
Delivery:	via email in 1 business day

GB/T 21559.2:2023 Rolling bearings - Linear motion rolling bearings - Part 2: Static load ratings Rolling bearings - Linear motion rolling bearings - Part 2: Static load ratings 1 Scope This document specifies methods of calculating the basic static load rating, static equivalent load and static safety factor for linear motion rolling bearings. This document is applicable to linear motion rolling bearings manufactured from contemporary, commonly used, high quality, hardened bearing steel in accordance with good manufacturing practice and basically of conventional design with regard to the shape of the rolling contact surfaces. This document is not applicable to designs where the rolling elements operate directly on the slide surface of the machine equipment, unless that surface is equivalent in all respects to the raceway of the linear motion rolling bearing component it replaces. 2 Normative references The following documents contain requirements which, through reference in this text, constitute provisions 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 76 Rolling bearings - Static load ratings Note: GB/T 4662-2012 Rolling bearings - Static load ratings (ISO 76:2006, IDT) ISO 5593 Rolling bearings- Vocabulary Note: GB/T 6930-2002 Rolling bearings - Vocabulary (ISO 5593:1997, IDT) 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 76 and ISO 5593 as well as the following apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: ——ISO Online browsing platform: available at https://www.iso.org/obp; ——IEC Electropedia: available at http://www.electropedia.org/.   3.1 recirculating linear ball bearing, sleeve type, with or without raceway grooves basically cylindrical sleeve provided with a number of closed loops of recirculating balls designed to achieve linear rolling motion along a hardened cylindrical shaft Note 1: See Figure 1. Note 2: The raceways in the sleeve can be designed cylindrical as well as steel inserts with raceway grooves parallel to the axis. Figure 1 Recirculating linear ball bearing, sleeve type 3.2 recirculating linear ball (or roller) bearing, linear guideway, carriage type linear ball (or roller) bearing provided with a number of symmetrically arranged, closed loops of recirculating balls (or rollers) designed to achieve linear rolling motion along a hardened guideway furnished with adequate raceways Note: See Figure 2. Figure 2 Recirculating linear ball (or roller) bearing, linear guideway, carriage type 3.3 non-recirculating linear ball bearing, linear guideway, deep groove type linear bearing with balls as rolling elements, each ball having two points of contact Note 1: See Figure 3. recirculating linear ball bearing, sleeve type, with or without raceway grooves basically cylindrical sleeve provided with a number of closed loops of recirculating balls designed to achieve linear rolling motion along a hardened cylindrical shaft Note 1: See Figure 1. Note 2: The raceways in the sleeve can be designed cylindrical as well as steel inserts with raceway grooves parallel to the axis. Figure 1 Recirculating linear ball bearing, sleeve type 3.2 recirculating linear ball (or roller) bearing, linear guideway, carriage type linear ball (or roller) bearing provided with a number of symmetrically arranged, closed loops of recirculating balls (or rollers) designed to achieve linear rolling motion along a hardened guideway furnished with adequate raceways

Foreword I Introduction II 1 Scope 2 Normative references 3 Terms and definitions 4 Symbols 5 Basic static load ratings 6 Static equivalent load 7 Static load safety factor Bibliography