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JB/T 2300-2018   Slewing bearings (English Version)
Standard No.: JB/T 2300-2018 Status:valid remind me the status change

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Language:English File Format:PDF
Word Count: 21000 words Price(USD):600.0 remind me the price change

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Implemented on:2019-5-1 Delivery: via email in 1 business day
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Standard No.: JB/T 2300-2018
English Name: Slewing bearings
Chinese Name: 回转支承
Professional Classification: JB    Professional Standard - Machinery
Issued by: Ministry of Industry and Information Technology
Issued on: 2018-07-04
Implemented on: 2019-5-1
Status: valid
Superseding:JB/T 2300-2011 Slewing bearings
Language: English
File Format: PDF
Word Count: 21000 words
Price(USD): 600.0
Delivery: via email in 1 business day
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. This standard is developed in accordance with the rules given in GB/T 1.1-2009. This standard replaces JB/T 2300-2011 Slewing bearings; the following technical changes have been made with respect to JB/T 2300-2011: ——the content of Table 7 is modified (see Table 7; Table 7 in Edition 2011). ——the content of Table 8 is modified (see Table 8; Table 8 in Edition 2011). ——the content of assembly is modified (see 5.2; 5.2 in Edition 2011). ——the content of testing methods is modified (see Clause 6; Clause 6 in Edition 2011); ——the content of inspection rules is modified (see Clause 7; Clause 7 in Edition 2011); ——the content of the load-bearing capacity graph is modified (see B.2; B.2 in Edition 2011); ——the durability test method is added (see B.3); This standard was proposed by the China Machinery Industry Federation. This standard is under the jurisdiction of SAC/TC 334 National Technical Committee on Earth-moving Machine of Standardization Administration of China. The previous editions of this standard are as follows: ——JB 2300-1978, JB/T 2300-1984, JB/T 2300-1999 and JB/T 2300-2011. Slewing bearing 1 Scope This standard specifies the symbols, classification and designation, requirements, testing methods, inspection rules, marking, packaging, transportation and storage of slewing bearings. This standard is applicable to slewing bearings for engineering machinery, mining machinery, port machinery, construction machinery and other machinery requiring relative slewing movement of two parts. 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 308.1 Rolling bearings - Balls - Part 1: Steel balls GB/T 699 Quality carbon structure steels GB/T 1357 Cylindrical gears for general engineering and for heavy engineering - Modules GB/T 3077 Alloy structure steels GB/T 4661 Rolling bearings - Cylindrical rollers GB/T 5617 Determination of effective depth of hardening after induction or flame hardening of steel GB/T 6394 Determination of estimating the average grain size of metal GB/T 10095.1-2008 Cylindrical gears - System of accuracy - Part 1: Definitions and allowable values of deviations relevant to corresponding flanks of gear teeth GB/T 10095.2-2008 Cylindrical gears - System of accuracy - Part 2: Definitions and allowable values of deviations relevant to radial composite deviations and runout information GB/Z 18620.1 Cylindrical gears - Code of inspection practice - Part 1: Inspection of corresponding flanks of gear teeth GB/Z 18620.2 Cylindrical gears - Code of inspection practice - Part 2: Inspection related to radial composite deviations, runout, tooth thickness and backlash HG/T 2349 Polyamide 1010 resin HG/T 2811 Rubber material of rotary shaft lip seal ring JB/T 5947 Engineering machinery - General technical specifications for packaging JB/T 7940.7 Grease nipples and lubricating cups - Technical specification 3 Symbols See Table 1 and Figure 1 for the appellation and symbol of each part of a slewing bearing. Table 1 Appellation and symbol of each part Symbol Appellation Symbol Appellation DL Diameter of center circle of roller path (of upper row) d1 Inner diameter of outer ring DW Diameter of rolling element (of upper row) D3 Inner diameter of inner ring D1 Distribution diameter for mounting holes of outer ring H Total height D2 Distribution diameter for mounting holes of inner ring H1 Height of inner/outer ring D Nominal outer diameter h Height difference between two end faces of inner and outer rings d Nominal inner diameter DS Effective case depth n Number of mounting holes L Thread length of mounting threaded hole n1 Number of lubricating holes da Diameter of addendum circle dn1 Diameter of mounting unthreaded hole of outer ring m Module dn2 Diameter of mounting unthreaded hole of inner ring x Radial modification coefficient of gear dm1 Diameter of mounting threaded hole of outer ring z Number of teeth dm2 Diameter of mounting thread hole of inner ring b Width of tooth Note: The outer ring in Figure a) is composed of an upper ring and a lower ring; the inner ring in Figure b) is composed of an upper ring and a lower ring. Figure 1 Appellation and symbol of each part of a slewing bearing (taking a triple-row roller slewing bearing as an example) 4 Classification and designation 4.1 Type 4.1.1 Structural style A slewing bearing is composed of rings (inner ring, outer ring and upper/lower ring), rolling elements, separators, sealing tapes, grease nipples/lubricating cups, etc., which are classified into four series by structural type: a) single-row four-point contact ball slewing bearings (series 01), as shown in Figure 2; b) double-row different-diameter ball slewing bearings (series 02), as shown in Figure 3, with the nominal diameter combination of rolling elements (of upper/lower row) as follows: 25/20, 30/25, 40/30, 50/40, 60/50; c) single-row crossed roller slewing bearings (series 11), as shown in Figure 4, whose rolling elements are 1:1 cross arranged at 90°; d) triple-row roller slewing bearings (series 13), as shown in Figure 5, whose nominal diameter combination of rolling elements is 25/20/16, 32/25/20, 40/32/25, 45/32/25 and 50/40/25. Note: The mounting holes of inner and outer rings may be classified into unthreaded holes or threaded holes (this note also applies to Figures 3~5, the type of threaded holes is the same as that in Figure 2, with designation of DW omitted). Figure 2 Single row four-point contact ball slewing bearings (series 01) Figure 3 Double-row different-diameter ball slewing bearings (series 02) Figure 4 Single-row crossed roller slewing bearings (series 11) Figure 5 Triple-row roller slewing bearings (series 13)   4.1.2 Transmission types Transmission types are classified into: a) 0——toothless type; b) 1——external teeth of involute cylindrical gear with a smaller meshing module; c) 2——external teeth of involute cylindrical gear with a greater meshing module; d) 3——internal teeth of involute cylindrical gear with a smaller meshing module; e) 4——internal teeth of involute cylindrical gear with a greater meshing module. 4.1.3 Mounting fitting types Mounting fitting types are classified into: a) 0——standard type with no seam allowance; b) 1——standard type with a seam allowance; c) 2——special type. 4.1.4 Mounting hole types Mounting hole types are classified into: a) 0——both the mounting holes of inner and outer ring are unthreaded holes; b) 1——both the mounting holes of inner and outer ring are threaded holes; c) 2——the mounting holes of inner ring are threaded holes, and those of outer ring are unthreaded holes; d) 3——the mounting holes of outer ring are threaded holes, and those of inner ring are unthreaded holes. 4.2 Basic parameters 4.2.1 See Table 2 for the basic parameters of single-row four-point contact ball slewing bearings.
Contents Foreword V 1 Scope 2 Normative references 3 Symbols 4 Classification and designation 4.1 Type 4.2 Basic parameters 4.3 Marking 5 Requirements 5.1 Parts 5.2 Assembly 5.3 Selection calculation 5.4 Load-bearing capacity curve 5.5 Other requirements 6 Testing methods 6.1 Testing of parts 6.2 Measurement of assembly precision 7 Inspection rules 7.1 End-of-manufacturing inspection 7.2 Type inspection 7.3 Judgment rules 7.4 Other requirements 8 Marking, packaging, transportation and storage 8.1 Marking 8.2 Packaging 8.3 Transportation and storage Annex A (Informative) Calculation method of slewing bearing selection A.1 Overview A.2 Calculation for selection of single-row four-point contact ball slewing bearings A.3 Calculation for selection of double-row different-diameter ball type slewing bearings A.4 Calculation for selection of single-row crossed roller slewing bearings A.5 Calculation for selection of triple-row roller slewing bearings (total radial force Fr is borne by radial rolling elements) A.6 Strength check of mounting bolts Annex B (Informative) Load-bearing capacity curve of slewing bearing B.1 Application conditions B.2 Load-bearing capacity curve B.3 Durability test method Bibliography
Referred in JB/T 2300-2018:
*GB/T 308.1-2013 Rolling bearings—Balls—Part 1:Steel balls
*GB/T 699-2015 Quality carbon structural steels
*GB/T 1357-2008 Cylindrical gears for general engineering and for heavy engineering - Modules
*GB/T 3077-2015 Alloy structure steels
*GB/T 4661-2015 Rolling bearings―Cylindrical rollers
*GB/T 5617-2005 Determination of effective depth of handening after induction or flame handening of steel
*GB/T 6394-2017 Metal - Methods for estimating the average grain size
*GB/T 10095.1-2008 Cylindrical gears - System of accuracy - Part 1: Definitions and allowable values of deviations relevant to corresponding flanks of gear teeth
*GB/T 10095.2-2008 Cylindrical gears - System of accuracy - Part 2: Definitions and allowable values of deviations relevant to radial composite deviations and runout information
*GB/Z 18620.1-2008 Cylindrical gears - Code of inspection practice-Part 1: Inspection of corresponding flanks of gear teeth
*GB/Z 18620.2-2008 Cylindrical gears - Code of inspection practice - Part 2: Inspetion related to radial composite deviations runout tooth thickness and backlash
*HG/T 2349-1992
*HG/T 2811-1996 Rubber Materials of Rotary Shaft Lip Seals
*JB/T 5947-2018
*JB/T 7940.7-1995 Grease nipples and lubricating cups technical specification
JB/T 2300-2018 is referred in:
*JB/T 12577-2015 Loader cranes
Code of China
Standard
JB/T 2300-2018  Slewing bearings (English Version)
Standard No.JB/T 2300-2018
Statusvalid
LanguageEnglish
File FormatPDF
Word Count21000 words
Price(USD)600.0
Implemented on2019-5-1
Deliveryvia email in 1 business day
Detail of JB/T 2300-2018
Standard No.
JB/T 2300-2018
English Name
Slewing bearings
Chinese Name
回转支承
Chinese Classification
Professional Classification
JB
ICS Classification
Issued by
Ministry of Industry and Information Technology
Issued on
2018-07-04
Implemented on
2019-5-1
Status
valid
Superseded by
Superseded on
Abolished on
Superseding
JB/T 2300-2011 Slewing bearings
Language
English
File Format
PDF
Word Count
21000 words
Price(USD)
600.0
Keywords
JB/T 2300-2018, JB 2300-2018, JBT 2300-2018, JB/T2300-2018, JB/T 2300, JB/T2300, JB2300-2018, JB 2300, JB2300, JBT2300-2018, JBT 2300, JBT2300
Introduction of JB/T 2300-2018
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. This standard is developed in accordance with the rules given in GB/T 1.1-2009. This standard replaces JB/T 2300-2011 Slewing bearings; the following technical changes have been made with respect to JB/T 2300-2011: ——the content of Table 7 is modified (see Table 7; Table 7 in Edition 2011). ——the content of Table 8 is modified (see Table 8; Table 8 in Edition 2011). ——the content of assembly is modified (see 5.2; 5.2 in Edition 2011). ——the content of testing methods is modified (see Clause 6; Clause 6 in Edition 2011); ——the content of inspection rules is modified (see Clause 7; Clause 7 in Edition 2011); ——the content of the load-bearing capacity graph is modified (see B.2; B.2 in Edition 2011); ——the durability test method is added (see B.3); This standard was proposed by the China Machinery Industry Federation. This standard is under the jurisdiction of SAC/TC 334 National Technical Committee on Earth-moving Machine of Standardization Administration of China. The previous editions of this standard are as follows: ——JB 2300-1978, JB/T 2300-1984, JB/T 2300-1999 and JB/T 2300-2011. Slewing bearing 1 Scope This standard specifies the symbols, classification and designation, requirements, testing methods, inspection rules, marking, packaging, transportation and storage of slewing bearings. This standard is applicable to slewing bearings for engineering machinery, mining machinery, port machinery, construction machinery and other machinery requiring relative slewing movement of two parts. 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 308.1 Rolling bearings - Balls - Part 1: Steel balls GB/T 699 Quality carbon structure steels GB/T 1357 Cylindrical gears for general engineering and for heavy engineering - Modules GB/T 3077 Alloy structure steels GB/T 4661 Rolling bearings - Cylindrical rollers GB/T 5617 Determination of effective depth of hardening after induction or flame hardening of steel GB/T 6394 Determination of estimating the average grain size of metal GB/T 10095.1-2008 Cylindrical gears - System of accuracy - Part 1: Definitions and allowable values of deviations relevant to corresponding flanks of gear teeth GB/T 10095.2-2008 Cylindrical gears - System of accuracy - Part 2: Definitions and allowable values of deviations relevant to radial composite deviations and runout information GB/Z 18620.1 Cylindrical gears - Code of inspection practice - Part 1: Inspection of corresponding flanks of gear teeth GB/Z 18620.2 Cylindrical gears - Code of inspection practice - Part 2: Inspection related to radial composite deviations, runout, tooth thickness and backlash HG/T 2349 Polyamide 1010 resin HG/T 2811 Rubber material of rotary shaft lip seal ring JB/T 5947 Engineering machinery - General technical specifications for packaging JB/T 7940.7 Grease nipples and lubricating cups - Technical specification 3 Symbols See Table 1 and Figure 1 for the appellation and symbol of each part of a slewing bearing. Table 1 Appellation and symbol of each part Symbol Appellation Symbol Appellation DL Diameter of center circle of roller path (of upper row) d1 Inner diameter of outer ring DW Diameter of rolling element (of upper row) D3 Inner diameter of inner ring D1 Distribution diameter for mounting holes of outer ring H Total height D2 Distribution diameter for mounting holes of inner ring H1 Height of inner/outer ring D Nominal outer diameter h Height difference between two end faces of inner and outer rings d Nominal inner diameter DS Effective case depth n Number of mounting holes L Thread length of mounting threaded hole n1 Number of lubricating holes da Diameter of addendum circle dn1 Diameter of mounting unthreaded hole of outer ring m Module dn2 Diameter of mounting unthreaded hole of inner ring x Radial modification coefficient of gear dm1 Diameter of mounting threaded hole of outer ring z Number of teeth dm2 Diameter of mounting thread hole of inner ring b Width of tooth Note: The outer ring in Figure a) is composed of an upper ring and a lower ring; the inner ring in Figure b) is composed of an upper ring and a lower ring. Figure 1 Appellation and symbol of each part of a slewing bearing (taking a triple-row roller slewing bearing as an example) 4 Classification and designation 4.1 Type 4.1.1 Structural style A slewing bearing is composed of rings (inner ring, outer ring and upper/lower ring), rolling elements, separators, sealing tapes, grease nipples/lubricating cups, etc., which are classified into four series by structural type: a) single-row four-point contact ball slewing bearings (series 01), as shown in Figure 2; b) double-row different-diameter ball slewing bearings (series 02), as shown in Figure 3, with the nominal diameter combination of rolling elements (of upper/lower row) as follows: 25/20, 30/25, 40/30, 50/40, 60/50; c) single-row crossed roller slewing bearings (series 11), as shown in Figure 4, whose rolling elements are 1:1 cross arranged at 90°; d) triple-row roller slewing bearings (series 13), as shown in Figure 5, whose nominal diameter combination of rolling elements is 25/20/16, 32/25/20, 40/32/25, 45/32/25 and 50/40/25. Note: The mounting holes of inner and outer rings may be classified into unthreaded holes or threaded holes (this note also applies to Figures 3~5, the type of threaded holes is the same as that in Figure 2, with designation of DW omitted). Figure 2 Single row four-point contact ball slewing bearings (series 01) Figure 3 Double-row different-diameter ball slewing bearings (series 02) Figure 4 Single-row crossed roller slewing bearings (series 11) Figure 5 Triple-row roller slewing bearings (series 13)   4.1.2 Transmission types Transmission types are classified into: a) 0——toothless type; b) 1——external teeth of involute cylindrical gear with a smaller meshing module; c) 2——external teeth of involute cylindrical gear with a greater meshing module; d) 3——internal teeth of involute cylindrical gear with a smaller meshing module; e) 4——internal teeth of involute cylindrical gear with a greater meshing module. 4.1.3 Mounting fitting types Mounting fitting types are classified into: a) 0——standard type with no seam allowance; b) 1——standard type with a seam allowance; c) 2——special type. 4.1.4 Mounting hole types Mounting hole types are classified into: a) 0——both the mounting holes of inner and outer ring are unthreaded holes; b) 1——both the mounting holes of inner and outer ring are threaded holes; c) 2——the mounting holes of inner ring are threaded holes, and those of outer ring are unthreaded holes; d) 3——the mounting holes of outer ring are threaded holes, and those of inner ring are unthreaded holes. 4.2 Basic parameters 4.2.1 See Table 2 for the basic parameters of single-row four-point contact ball slewing bearings.
Contents of JB/T 2300-2018
Contents Foreword V 1 Scope 2 Normative references 3 Symbols 4 Classification and designation 4.1 Type 4.2 Basic parameters 4.3 Marking 5 Requirements 5.1 Parts 5.2 Assembly 5.3 Selection calculation 5.4 Load-bearing capacity curve 5.5 Other requirements 6 Testing methods 6.1 Testing of parts 6.2 Measurement of assembly precision 7 Inspection rules 7.1 End-of-manufacturing inspection 7.2 Type inspection 7.3 Judgment rules 7.4 Other requirements 8 Marking, packaging, transportation and storage 8.1 Marking 8.2 Packaging 8.3 Transportation and storage Annex A (Informative) Calculation method of slewing bearing selection A.1 Overview A.2 Calculation for selection of single-row four-point contact ball slewing bearings A.3 Calculation for selection of double-row different-diameter ball type slewing bearings A.4 Calculation for selection of single-row crossed roller slewing bearings A.5 Calculation for selection of triple-row roller slewing bearings (total radial force Fr is borne by radial rolling elements) A.6 Strength check of mounting bolts Annex B (Informative) Load-bearing capacity curve of slewing bearing B.1 Application conditions B.2 Load-bearing capacity curve B.3 Durability test method Bibliography
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Keywords:
JB/T 2300-2018, JB 2300-2018, JBT 2300-2018, JB/T2300-2018, JB/T 2300, JB/T2300, JB2300-2018, JB 2300, JB2300, JBT2300-2018, JBT 2300, JBT2300