GB/T 304.2-2015 English PDF (GBT304.2-2015)

This Part of GB/T 304 specifies the preparation method for identification code of spherical plain bearings. This Part is applicable to spherical plain bearings of general purpose.

GB/T 304.2-2015
GB
NATIONAL STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 20.100.10
J 11
Replacing GB/T 304.2-2002
Spherical plain bearings - Identification code
ISSUED ON. DECEMBER 31, 2015
IMPLEMENTED ON. APRIL 1, 2016
Issued by. General Administration of Quality Supervision, Inspection
and Quarantine;
Standardization Administration Committee.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Composition of spherical plain bearings ... 5
Foreword
GB/T 304 Spherical plain bearings consists of the following 4 parts.
- Part 1. Classification;
- Part 2. Identification code;
- Part 3. Fits;
- Part 4. General technical rules.
This Part is the 2nd part of GB/T 304.
This Part was drafted in accordance with the rules given in GB/T 1.1-2009. This Part replaces GB/T 304.2-2002 Spherical plain bearings - Identification code. Compared with GB/T 304.2-2002, the main technical changes are as
follows.
- modified “EW” and “EM” of size series codes to “W(EW)” and “M(EM)”
(see Table 2 of this Edition, Table 3 of Edition 2002);
- added Commonly used joint bearing combination codes (see Table 3);
- added Code method for ball joints of ball - end rods (see 3.2.2);
- added B inner hole lining structure and its code B in structure type codes (see Table 5);
- added the ring sliding surface having a cross-lubrication groove structure and its code "J" and ring lubrication groove structure and its code "H" in supplementary codes (see Table 6);
- simplified the preparation of supplementary code rules (see 3.3.3.3 of this Edition, 3.2.2 of Edition 2002).
This Part was proposed by China Machinery Industry Federation.
This Part shall be under the jurisdiction of National Technical Committee on Rolling bearings of Standardization Administration of China (SAC.TC 98). Drafting organizations of this Part. Luoyang Bearing Research Institute Co., Ltd., Fujian Longxi Bearing (Group) Co., Ltd., Taizhou Kejin Bearing Co., Ltd., Zhejiang Jingjiu Bearing Co., Ltd.
Main drafters of this Part. Zhu Yuqin, Lu Jinzhong, Zhan Songhua, Song
Yucong, Yao Yongwei, Chen Zhixiong, Kong Jingjing, He Guohui, Zhang Yiqing. Spherical plain bearings - Identification code
1 Scope
This Part of GB/T 304 specifies the preparation method for identification code of spherical plain bearings.
This Part is applicable to spherical plain bearings of general purpose. 2 Normative references
The following referenced documents are indispensable for the application 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.
GB/T 9161-2001, Spherical plain bearings--Spherical plain bearings rod
ends
GB/T 9162-2001, Spherical plain bearings--Thrust spherical plain bearings GB/T 9163-2001, Spherical plain bearings--Radial spherical plain bearings GB/T 9164-2001, Spherical plain bearings--Angular contact radial spherical plain bearings
JB/T 5306-2007, Spherical Plain Bearings - Self-lubricated Spherical Plain Bearing Rod End with Ball Stud Integral Design - Dimensions and Tolerances 3 Composition of spherical plain bearings
3.1 General
The identification code of spherical plain bearing consists of the basic code and the post code. The order is as follows.
Basic code Post code
3.2 Basic code
The basic code indicates the basic type structure and size of spherical plain bearing.
The clearance group code of spherical plain bearing is marked at the rightmost of the spherical plain bearing code, separated with the short line “-”. The clearance group code of spherical plain bearing is represented by letter and number, according to the provisions of Table 7.
Table 7
Code Meaning
C2 2 groups of which the clearance complies with the standard provisions - N groups of which the clearance complies with the standard provisions C3 3 groups of which the clearance complies with the standard provisions C9 The bearing clearance is different from the current standard.
Example. GE15ES-C2
indicating 2 groups of radial spherical plain bearing of which the nominal inner diameter is 15 mm, single seam outer ring, with lubricant oil hole, the radial clearance complies with standard provisions.