Standard No.:	JB/T 9145-2010
English Name:	Rolling bearings-Cemented carbide balls
Chinese Name:	滚动轴承 硬质合金球
Chinese Classification:	J11    Rolling bearing
Professional Classification:	JB    Professional Standard - Machinery
ICS Classification:	21.100.20 21.100.20    Rolling bearings 21.100.20
Issued by:	Ministry of Industry and Information Technology
Issued on:	2010-02-11
Implemented on:	2010-7-1
Status:	valid
Superseding:	JB/T 9145-1999 Hard metal balls
Language:	English
File Format:	PDF
Word Count:	3000 words
Price(USD):	204.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the dimension, technical requirements, measurement and inspection methods, inspection rules, marking, rustproof packaging and storage of cemented carbide balls. This standard is applicable to the manufacture, inspection and acceptance of commodity cemented carbide balls. 2 Normative References The following normative documents contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments (excluding corrections to) to, or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest editions of the normative documents apply. GB/T 308-2002 Rolling Bearings-Steel Balls (IS0 3290: 1998, NEQ) GB/T 3489-1983 Hardmetals; Metallographic Determination of Porosity and Uncombined Carbon (eqv ISO 4505: 197) GB/T 3849-1983 Hardmetals; Rockwell Hardness(Scale A) Test Method (eqv ISO 3738: 1982) GB/T 3851-1983 Hardmetals; Determination of Transverse Rupture Strength (eqv ISO 3327: 1982) GB/T 5242-2006 Check Rules and Test Methods of Cemented Carbide Products GB/T 6930-2002 Rolling Bearings-Vocabulary (ISO 5593: 1997, DT) GB/T 7997-1987 Hardmetals; Vickers Hardness Test (eqv IS03878: 1983) GB/T 8597-2003 Rolling Bearings-Rust Proof Packaging GB/T 10610-2009 Geometrical Product Specifications(GPS)-Surface Texture: Profile Method-Rules and Procedures for the Assessment of Surface Texture (ISO 4288: 1996, IDT) GB/T 18376.3-2001 Grades of Cemented Carbide Part 3: Grades of Cemented Carbide for Wear Parts JB/T 8921-1999 Rolling Bearings and Commercial Parts-Inspection Rules

Contents Foreword I 1 Scope 2 Normative References 3 Terms and Definitions 4 Dimensions 5 Technical Requirements 5.1 Materials 5.2 Grade of Tolerance 5.3 Geometrical Shape, Surface Quality and Dimensional Tolerance 5.4 Appearance 5.5 Others 6 Measurement and Inspection Methods 6.1 Dimension and Shape Tolerance 6.2 Surface Roughness 6.3 Appearance 6.4 Physical and Mechanical Properties 7 Inspection Rules 8 Marking, Packaging and Storage 8.1 Marking 8.2 Rust Proof Packaging 8.3 Storage