GB/T 1151-2023Internal combustion engines - Main and connecting rod bearings - Specifications (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents" drafting:

This document replaces GB/T 1151-2012 "Technical Conditions for Internal Combustion Engine Main Bearings and Connecting Rod Bearings", and is consistent with GB/T 1151-2012

In addition to structural adjustments and editorial changes, the main technical changes are as follows:

a) Changed the material requirements (see 5:2, 5:2 of the:2012 edition);

b) Change the hardness requirements (see 5:3, 5:2:1 of the:2012 edition);

c) Added metallographic structure requirements (see 5:4);

d) Changed the dimensional tolerances and shape and position tolerances (see 5:5, 5:3 of the:2012 edition);

e) Changed the surface roughness requirements (see 5:6, 5:4 of the:2012 edition);

f) Changed the bonding strength requirements (see 5:7, 5:5 of the:2012 edition);

g) Changed the appearance quality requirements (see 5:8, 5:6 of the:2012 edition);

h) Increased cleanliness requirements (see 5:9);

i) The inspection method has been changed (see Chapter 6, Chapter 6 of the:2012 edition);

j) The inspection rules have been changed (see Chapter 7, Chapter 7 of the:2012 edition);

k) The marking, packaging, transportation and storage have been changed (see Chapter 8, Chapter 8 of the:2012 edition):

Please note that some contents of this document may refer to patents: The issuing agency of this document assumes no responsibility for identifying patents:

This document is proposed by China Machinery Industry Federation:

This document is under the jurisdiction of the National Internal Combustion Engine Standardization Technical Committee (SAC/TC177):

This document is drafted by: Kunming Yunnei Power Co:, Ltd:, Shandong Yunnei Power Co:, Ltd:, Guangxi Yuchai Machinery Co:, Ltd:

1 Scope

This document specifies the structure and dimensions, technical requirements, inspection methods, inspection rules and signs, package

Packing, transportation and storage:

This document is applicable to reciprocating piston internal combustion engines (except for low-speed engines) with flangeless, thin-walled main

Rod bearing bush (hereinafter referred to as bearing bush):

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references

For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document:

GB/T 191 Packaging, storage and transportation icon marks

GB/T 231:1 Brinell hardness test for metallic materials - Part 1: Test method

GB/T 1800:1-2020 Product Geometric Specifications (GPS) Linear Dimensional Tolerance ISO Code System Part 1: Tolerance, deviation Basis of difference and fit

GB/T 2828:1 Counting sampling inspection procedure Part 1: Batch-by-batch inspection sampling plan retrieved by acceptance quality limit (AQL)

GB/T 2829 Periodic inspection counting sampling procedure and table (applicable to the inspection of process stability)

GB/T 2889:1-2020 Sliding bearing terms, definitions, classifications and symbols Part 1: Structure, bearing materials and their properties

GB/T 3821 Cleanliness limit and determination method of small and medium power internal combustion engines

GB/T 4340:1 Vickers hardness test for metallic materials - Part 1: Test method

GB/T 4955 Coating Thickness Measurement of Metal Coatings - Anodic Dissolution Coulometric Method

GB/T 4956 Magnetic method for measuring the thickness of non-magnetic coatings on magnetic substrates

GB/T 6388 Transport packaging receipt and delivery marks

GB/T 6462 Microscopic method for measuring the thickness of metal and oxide coatings

GB/T 10610 Product Geometric Specifications (GPS) Surface Structure Profiling Method for Assessing Surface Structure Rules and Methods

GB/T 12613:4 Rolled sleeves for sliding bearings - Part 4: Materials

GB/T 12613:7 Rolled sleeves for sliding bearings - Part 7: Measurement of wall thickness of thin-walled sleeves