JB/T 8879—2001 This standard is a revision and merger of JB/T 8879—1999 and JB/T 5390—1991. The revision adds requirements for definitions, terms, codes, and classifications; adds the measurement method of clearance of large-size radial spherical plain bearings and the inspection method of hardness. This standard specifies the general technical conditions for spherical plain bearings. Supplementary technical conditions should be formulated separately for bearings for special purposes. This standard applies to spherical plain bearings whose dimensions conform to GB/T 9161 "spherical plain bearings rod ends", GB/T 9163 "spherical plain bearings thrust spherical plain bearings", GB/T 9163 "spherical plain bearings radial spherical plain bearings" and GB/T 9164 "spherical plain bearings angular contact spherical plain bearings". It is for production, inspection by manufacturers and acceptance by users. This standard does not apply to spherical plain bearings for aircraft frames. The previous versions of the standards replaced by this standard are: ——ZB J11 022—1989, JB/T 887—1999 (adjustment); ——JB/T 5390—1991. JB/T 8879-2001 General technical conditions for spherical plain bearings JB/T8879-2001 Standard download decompression password: www.bzxz.net

ICS 21.100.20
Machinery Industry Standard of the People's Republic of China
JR/T8879-2001
Spherical plain bearingsGeneral specifications2001-05-23 Issued
China Machinery Industry Federationwww.bzxz.net
2001-10-01 Implementation
JB/T9879-200T
This standard is a revision of JB/T8879-1999 (original code ZBJI[022-1989) General Technical Specifications for Spherical Joint Bearings and E
53-199 "Technical Specifications for Rod End Spherical Joint Bearings". Compared with the original standard, the main changes in this standard are as follows: Added requirements for definitions and terms:
·-Added requirements for codes and classifications: - Added the method for measuring the play of large-size radial spherical joint bearings: - Added the method for checking the degree of penetration This standard replaces B/T8879-1999 and JB/T5390-1991 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Standardization of Rolling Bearings. The drafting units of this standard are Luoyang Rolling Bearing Research Institute and Longjian Rolling Bearing Co., Ltd. The main drafters of this standard are Bao and Lu Jinzhong. The European versions of the standards replaced by this standard are: -2BJ1V22-1989, JB879-1999 [Adjustment: -JB/T5390-1991.
Mechanical Industry Standards of the People's Republic of China
General Technical Conditions for Spherical Plain Bearings
Spherical Plain Bearings General Specificatlons JB/T$879--2001
Generation J8879--1999
JR/T 5.9—[991
This standard specifies the general technical conditions for spherical plain bearings. For bearings with special applications, supplementary technical conditions should be formulated. This standard is applicable to spherical plain bearings whose dimensions conform to GB/T9161, GB/T9162, GBT9163 and GBT9164, for production, inspection and acceptance by manufacturers. The standard does not apply to spherical plain bearings for aircraft frames. 1 Reference standards
The provisions contained in the following standards constitute the provisions of this standard through their use in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T 304.1—1988
GR/T 304.2 — 1988 | | tt | t||GB/T9162—1990
GB/T 91631990
G164190
JE/T 1255—2001
18/135741997
JB/6641—143
18/7361—1994
JB/T 8565—1997
JT8567—1997
JB8921—1999
3 Terms and definitions
Classification of joint bearings
Code method of joint bearings
Principles and methods of measurement and inspection of rolling bearings High-quality carbon wide structural steel
Glossary of joint bearings
Definition of rolling bearing tolerances
Packaging of rolling bearings
Joint bearing support end Joint shaft fluid
Joint bearing thrust joint bearing||t t||Related bearingsCentral differential joint bearings
Related shaftsAngular contact joint bearings
High carbon bearing steelFixed bearing partsTechnical conditions for joint treatment of rolling bearing products
Rolling bearing residual force method and its evaluation
Rolling bearing parts hardening test force method
Rated dynamic load and life of spherical bearings
Rated static load of spherical bearings
Inspection rules for rolling bearings and their product parts The terms and definitions adopted in this standard shall conform to the provisions of 0B/T3944 and GB/T4199. China Machinery Industry Federation Xin 2001-05-23 approved 2001-10-01 implementation model
4 Classification and code
4.1 Classification
H88792001
The classification of spherical plain bearings shall be in accordance with the provisions of GB/T304.1: 4.2 Code
The code of spherical plain bearings shall be in accordance with the provisions of GB.304.2; 5 Overall dimensions
5.1 The overall dimensions of radial spherical plain bearings shall be in accordance with the provisions of GB9163; 5.2 The overall dimensions of angular contact spherical plain bearings shall be in accordance with the provisions of GB9164. 5.3 The outer dimensions of the thrust joint bearing shall comply with the provisions of GB/T9162. 5.4 The outer dimensions of the spherical joint bearing shall comply with the provisions of GB/T911. 6 Technical requirements
6.1 Materials and hardness
%. 1.1 The inner ring and the outer ring of the bearing (except the extruded outer ring) shall be made of high-chromium auxiliary steel such as GCrIs or CiCrIsSiMn. The hardness of the inner ring and the outer ring of the bearing (except the extruded outer ring) shall be 58-64HRC, the hardness of the outer ring of the bearing shall be 54~60HRC, and the heat treatment quality shall comply with the provisions of GB/T25S. The extruded outer ring shall be made of 45 high-quality structural steel or bearing steel (not hardened); the insert type outer ring shall be made of 45 high-quality carbon structural steel or bearing steel, with a hardness of 26-34HRC. The heat treatment quality shall comply with the provisions of the manufacturer. 6.1.2 The end body shall be made of steel that meets the requirements of GB The rod end body shall be made of 45 or 35 high-quality carbon or structural steel as specified in AT699, and the tolerance of the rod end after quenching and tempering shall not be less than HRC
6.2 Tolerances
6.2.1 The tolerances of radial spherical bearings shall be in accordance with GB/T9163. 6.2.2 The tolerances of angular contact joint shafts shall be in accordance with GB/T164. 6.2.3 The tolerances of thrust joint shafts shall be in accordance with GB/T19162. 6.2.4 The tolerances of rod end bearings shall be in accordance with GB/T9161. 6.3 Radial play
6.3.1 The radial clearance of radial spherical bearings shall be in accordance with GB/T9163. 6.3.2 The radial clearance of end spherical bearings may be in accordance with GB/T9161. 6.3.3 The radial clearance of double half outer and joint outer bearings may be calculated and matched, and the value shall comply with GB/T9161. 6.3.4 The radial clearance of C-type self-lubricating spherical bearings shall be in accordance with the provisions of Table 1. The radial clearance of the core-type white-running spherical bearings shall be in accordance with the provisions of Table 1. The radial clearance of the core-type white-running spherical bearings shall be in accordance with the provisions of Table 2. Table 2 Surface roughness The nominal internal clearance of the bearings shall be in accordance with the provisions of Table 2. Table 2 Surface roughness The nominal internal clearance of the bearings shall be in accordance with the provisions of Table 2. 2 The internal clearance (oil screen) and its end surface roughness shall be in accordance with the internal clearance. 3 The external clearance (electrical illumination) and its normal surface roughness shall be in accordance with the external diameter. 6.5 Surface 2 Treatment The end surface: The surface roughness of the ... Others
.5.1 The surface of the sliding joint shaft is steel-to-steel. The surface of the shaft ring should be treated with reverse erosion. The sliding contact surface should be coated with a coating of enamel. 6.5.2 The inner spherical surface of the lubricating joint shaft should be forged. The thickness of the coating and the surface quality should meet the requirements of the product sample. 6.5.3 The outer surface of the rod end should be completely coated with a key or other anti-corrosion coating. The thickness of the coating and the surface quality should meet the requirements of the product sample. 6.6 Surface quality and
6.6.1 The bearing sleeve, rod end body and the surface should not have any rust, corrosion and other defects. 6.6.2 The self-lubricating material in the self-lubricating joint bearing should not have any damage on the surface. The self-lubricating material should be in close contact with the sleeve or rod end.
6.7 Residual magnetism
The residual magnetism of the shaft should meet the requirements of B 6641 or the manufacturer's regulations. 6.8 Rated load calculation method
The calculation method of rated static load and rated dynamic load of the bearing shall comply with the provisions of JB/TB567 and JB/T8565 or the "manufacturer". .0 Others
(9 When assembling micro-end spherical bearings, the outer ends of the bearings shall be matched with the corresponding ends, and there shall be no looseness in the circumferential, radial and axial directions. 6.9.1 The rotation, swing flexibility and other requirements of the bearing shall comply with the provisions of the product sample or the "manufacturer": 7. Measurement method
T.1 Tolerance
7.1.1 The dimensional tolerance of the spherical bearing should be checked after finishing but before surface treatment, splitting and cracking. The base preparation method shall be in accordance with the provisions of GR 307.2.
7.1.2 The inspection of the end center height deviation can be replaced by the distance between the bottom of the inner hole and the end of the rod end plus the inner hole radius. 7.4.1 The pry thread tolerance is checked in the table and the shear is checked with a thread limit gauge of the same grade. 1.1 Radial play
7.2. The radial play of the bearing should be measured in the finished product state. When measuring, fix the ring (do not deform the ring), and the blade-JB/T 8879-2001
The radial clearance of the radial joint shaft with a diameter of 120° is measured at the positions of the radial disk at intervals of 120°. The arithmetic mean is the radial clearance. 7.1.2 For radial joint shafts with large and small sizes (i.e., 120 mmH), the radial clearance should be measured before the bearing is assembled. The spherical diameter of the inner ring should be determined. 7.2.3 The radial clearance of the outer ring of the hoop should be checked before the cracking process. 7.3 Surface particle size
The surface particle size should be checked before the surface treatment. It can be checked with a surface roughness measuring instrument or compared with a surface roughness standard sample by a gauge method (without using an amplifier). 1.4 Hardness
The hardness measurement method shall be in accordance with JB/7361 or the manufacturer's research. 7. 5. The inspection method of the magnetic field shall be in accordance with the provisions of JB/T8921 or the manufacturer's regulations: 7.6 Others
The inspection method of the rotation, swing flexibility and appearance quality of the bearing shall be in accordance with the provisions of the manufacturer. Inspection
8. The inspection rules for the bearing system shall be in accordance with the provisions of JB/T8921, using the general inspection level, the main inspection items daily AQL 2.5. The secondary inspection items monthly AQL value 6.5: Inspection items are shown in Table 3, Table 3 Inspection items
Main inspection items
Difference and variation of internal diameter m, d
Difference and variation of external diameter DuYe\ore
Light limit
Media tolerance
First inspection item H
Axis ratio Actual support (endurance deviation 7
Residual magnetic strength
Transmission energy balance angle
-screen Actual center height deviation
Table shape, appearance
Marking
Name 2Qualified products should be accompanied by a quality certificate, and the certificate should indicate: a) Manufacturer name (or trademark;
b1 Bearing code:
5) This standard number or supplementary technical part number: d) Packing period.
9 Marking
The marking of bearings is in accordance with the provisions of JD/T1574. 10 Packing
The packaging of batch acceptance shall be in accordance with the frequency of GB/T859
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