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GB/T 2688-2012: Plain bearing -- Technical specification of powder metallurgy bearing
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Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
GB/T 2688-2012	English	229	Add to Cart	3 days [Need to translate]	Plain bearing -- Technical specification of powder metallurgy bearing
GB/T 2688-1981	English	199	Add to Cart	2 days [Need to translate]	Powder metallurgy plain bearing--Technical requirements

GB/T 2688-2012: Plain bearing -- Technical specification of powder metallurgy bearing

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ICS21.100.10 J12 National Standards of People's Republic of China Replacing GB/T 2688-1981 Powder metallurgy plain bearing Technical conditions Issued on. 2012-05-11 2012-12-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard rule according to GB/T 1.1-2009 given draft. This standard replaces GB/T 2688-1981 "Powder metallurgy plain bearing technical condition." Compared with the GB/T 2688-1981, The main technical changes are as follows. --- Standard format in accordance with GB/T 1.1 claim rearrange; --- Increasing the normative references; --- Revised Table 1, Table 2 powder metallurgy method of marking an increase of iron-based and copper-bearing species; --- Table 2 and Table A.3 in the unit "kgf/mm2" to "MPa"; --- Normative Appendix A bearing surface roughness by the "▽ 7" to "≤Ra1.6". The standard proposed by China Machinery Industry Federation. This standard sliding bearing by the National Standardization Technical Committee (SAC/TC236) centralized. This standard is drafted by. The machine Productivity Promotion Center, Hefei Bolin Advanced Materials Co., Ltd. Participated in the drafting of this standard. Hefei University, Lin'an Oriental Bearing Co., Ltd. This standard replaces the standards previously issued as follows. --- GB/T 2688-1981. Powder metallurgy plain bearing Technical conditions

1 Scope

This standard specifies the technical conditions for powder metallurgy bearing GB/T 18323 prescribed. This standard applies to copper-based and iron-based powder metallurgy bearings.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated edition applies to this article Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 223 (all parts), steel and alloy chemical analysis method GB 443-1989 L-AN Total loss system oil GB/T 1800.1-2009 Geometrical product specifications (GPS) limits and fits - Part 1. Tolerances, deviations and fits basis GB/T 1800.2-2009 Geometrical product specifications (GPS) limits and fits - Part 2. Standard tolerance grades and holes and shafts Limit deviations GB/T 1958-2004 Geometrical Product Specifications (GPS) shape and position tolerance testing requirements GB/T 5163-2006 sintered metal materials (excluding carbide) Permeable sintered metal material density, oil content and open Determination of porosity Determination of strength GB/T 6804-2008 sintered metal bushing radial crushing Determination of apparent hardness of the first part of the GB/T 9097.1-2002 sintered metal materials (excluding hardmetal). a cross-sectional hardness of the matrix The uniform material GB/T 10425-2002 sintered metal friction materials - Determination of apparent hardness GB/T 18323-2001 sintered sliding bearing bushes - Dimensions and tolerances

3 Technical requirements

3.1 bearing material classification according to alloy composition and density, according to the provisions in Table 1. Table 1 Classification of the base class base alloy No. Classification Classification Grade mark oil density/(g/cm3) Iron-based 1 Iron 1 Iron - Graphite 2 FZ11060 > 5.7 ~ 6.2 FZ11065 > 6.2 ~ 6.6 FZ12058 > 5.6 ~ 6.0 FZ12062 > 6.0 ~ 6.4 FZ12158 > 5.6 ~ 6.0 FZ12162 > 6.0 ~ 6.4 ...