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.
JB/T 5389 Rolling Bearings - Roller Bearings for Rolling Mills has two parts:
——Part 1: Four-row Cylindrical Roller Bearings;
——Part 2: Double-row and Four-row Tapered Roller Bearings.
This part is Part 2 of JB/T 5389.
This part is developed in accordance with the rules given in GB/T 1.1-2009.
This part replaces JB/T 5389.2-2005 Rolling Bearings - Double-row and Four-row Tapered Roller Bearings for Rolling Mills.
In addition to editorial changes, the following main technical changes have been made with respect to JB/T 5389.2-2005:
——the name of the standard (see the cover and front page of this edition as well as those of 2005 edition) is modified;
——the code and successive sequence and content of main structural types are adjusted, (see Chapters 4 and 5; Chapters 4 and 5 of 2005 edition);
——the structural types and boundary dimensions of Type 370000 and Type 370000D bearings are added (see Figures 2 and 3 and Table 1);
——the technical requirements for surface roughness and appearance quality are added (see Chapter 7);
——the inspection for rotating flexibility and appearance quality is added (see Chapter 8);
——the content of rustproof packaging is specified in a separate chapter (see Chapter 11; 9.2 of 2005 edition).
This part was proposed by China Machinery Industry Federation.
This part is under the jurisdiction of the National Technical Committee on Rolling Bearing of Standardization Administration of China (SAC/TC 98).
The previous editions of this part are as follows:
——JB/T 5389.2-1995, JB/T 5389.2-2005.
Rolling Bearings - Roller Bearings for Rolling Mills - Part 2: Double-row and Four-row Tapered Roller Bearings
1 Scope
This part of JB/T 5389 specifies the main identification codes, structural types, boundary dimensions, technical specifications, inspection methods, inspection rules and marking and rustproof packaging of double-row tapered roller bearings for rolling mills (hereinafter referred to as the “double-row bearing”) and the four-row tapered roller bearings for rolling mills (hereinafter referred to as the “four-row bearing”).
This part is applicable to the production, inspection and acceptance of double-row and four-row tapered roller bearings for rolling mills.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated reference, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 272 Rolling Bearing - Identification Code
GB/T 299-2008 Rolling Bearings - Metric Double Row Tapered Roller Bearings - Boundary Dimensions
GB/T 300-2008 Rolling Bearings - Four Row tapered Roller Bearings - Boundary Dimensions
GB/T 307.2-2005 Rolling Bearings - Measuring and Gauging Principles and Methods
GB/T 307.3-2005 Rolling Bearings - General Technical Regulations
GB/T 699-2015 Quality Carbon Structure Steel
GB/T 711-2008 Hot-rolled Quality Carbon Structural Steel Plates, Sheets and Wide Strips
GB/T 3203-2016 Specification for Carburizing Steels of Bearings
GB/T 4199-2003 Rolling Bearings - Tolerances - Definitions
GB/T 7811-2015 Rolling Bearings - Symbols for Physical Quantities
GB/T 8597-2013 Rolling Bearings - Rust Proof Packaging
GB/T 13237-2013 Cold Rolled Quality Carbon Structural Steel Sheets and Strips
GB/T 18254-2016 High-carbon Chromium Bearing Steel
GB/T 24605-2009 Rolling Bearings - Marking for Products
GB/T 24608-2009 Inspection Rules for Rolling Bearings and Commercial Parts
JB/T 1255-2014 Rolling Bearings - Parts Made from High-carbon Chromium Bearing Steels - Specifications for Heat Treatment
JB/T 7051-2006 Rolling Bearing Parts - Methods for the Measurement and Assessment of Surface Roughness
JB/T 8236-2010 Rolling Bearings - Internal Clearances and Adjusting Methods for Double-row and Four-row Tapered Roller Bearings
JB/T 8881-2011 Rolling Bearings - Carburizing Heat - Treatment for Parts - Specifications
JB/T 10336-2017 Rolling Bearings - Supplementary Specifications
3 Symbols
For the purposes of this document, the symbols given in GB/T 4199-2003 and GB/T 7811-2015 and the following apply.
D1mp max-D2mp min: the difference between the maximum and minimum mean outside diameters of the outer rings of a bearing.
d1mp max-d2mp min: the difference between the maximum and minimum mean bore diameters of the inner rings of a bearing.
r: the nominal chamfer of inner ring
rsmin: the minimum single chamfer dimension of inner ring
r1: the nominal chamfer of outer ring
r1min: the minimum single chamfer dimension of outer ring
T3: the width of Type 370000 and Type 370000D double-row tapered roller bearings (assembly)
4 Identification Code
The identification code of bearings shall be in accordance with those specified in GB/T 272.
5 Main Structural Types (See Figures 1~4)
Figure 1 Double-row Tapered Roller Bearing
Type 350000 Figure 2 Double-row Tapered Roller Bearing
Type 370000
Figure 3 Double-row Tapered Roller Bearing
Type 370000D Figure 4 Four-row Tapered Roller Bearing
Type 380000
6 Boundary Dimensions
6.1 The boundary dimension of double-row tapered roller bearing of Type 350000 shall be in accordance with those specified in GB/T 299-2008.
6.2 The boundary dimensions of double-row tapered roller bearings of Type 370000 and Type 370000D are detailed in Table 1.
6.3 The boundary dimension of four-row tapered roller bearing of Type 380000 shall be in accordance with those specified in GB/T 300-2008.
Table 1 Boundary Dimensions of Bearings of Type 370000 and Type 370000D In: mm
Bearing type d D T3 B rsmin r1smin
Type 370000 Type 370000D
374032X2
374934X2
374134X3
373334X2
375236X1
372336X3
373138
373138X2
374140
374240X2
374240X3
372440X3
373142X2
373342X2
372442X3
373144X1
373248X3
374152X3
373152X3
374152X1
374956X3
370657
370658
373260X3
372060X3
373160
374160X3
370661
370661X1
374264X3
370666
374168
374272X3
373276X1
370678
374180X2
370682
373088X2
370690
370690X3
373092X3
374092X2
3731/500X3
3741/500X3
3706/510
3749/530X2
3740/530X1
3706/570
3706/580
3740/600X2
3741/630
3706/635
3706/690
3758/710X3
3706/724 374032X2D
374934X2D
374134X3D
373334X2D
375236X1D
372336X3D
373138D
373138X2D
374140D
374240X2D
374240X3D
372440X3D
373142X2D
373342X2D
372442X3D
373144X1D
373248X3D
374152X3D
373152X3D
374152X1D
374956X3D
370657D
370658D
373260X3D
372060X3D
373160D
374160X3D
370661D
370661X1D
374264X3D
370666D
374168D
374272X3D
373276X1D
370678D
374180X2D
370682D
373088X2D
370690D
370690X3D
373092X3D
374092X2D
3731/500X3D
3741/500X3D
3706/510D
3749/530X2D
3740/530X1D
3706/570D
3706/580D
3740/600X2D
3741/630D
3706/635D
3706/690D
3758/710X3D
3706/724D 160
170
170
170
180
180
190
190
200
200
200
200
210
210
210
220
240
260
260
260
280
285
290
300
300
300
300
305
305
320
330
340
360
380
390
400
410
440
450
450
460
460
500
500
510
530
530
570
580
600
630
635
690
710
724 240
230
295
360
330
400
320
320
340
360
380
460
355
440
480
360
460
420
459
500
389.5
380
450
560
440
500
520
500
560
620
540
580
680
650
570
650
580
650
820
830
655
680
820
870
733.5
710
730
750
830
870
1030
939.8
980
900
915 76
65
100
160
190
232
104
114
140
170
180
260
127
244
230
120
140
170
155
180
92
92
180
170
105
160
210
200
200
282
176
243
330
240
200
240
160
150
300
320
184
230
256
340
200
190
250
240
280
270
400
304.8
355
197
187 76
65
100
160
190
232
104
114
140
170
180
260
127
244
230
120
140
170
155
180
92
92
180
170
105
160
210
200
200
282
176
243
330
240
200
240
160
150
300
320
184
230
256
340
200
190
250
240
280
270
400
304.8
355
197
187 1.5
0.7
2.5
2.5
1.5
5
3
3
3
1.5
1.5
6
5
5
6
3
5
5
5
5
4
1
3
5
4
4
6
4.3
6
2.5
5
4
4
3
5
6
7
6
7.5
7.5
2.5
4
7.5
6
3.3
5
6
6
3
6
3.3
3.2
6.5
3
5 3
2
4
4
5
4
3
3
3
4
4
5
3
6
6
4
5
5
4
5
4
2.5
4
5
4
5
5
6
5
5
5
4
7.5
6
5
6
4
6
7.5
7.5
6
4
7.5
9.5
3.3
5
6
6
6
6
6.4
6.4
6.5
6
5
Foreword I
1 Scope
2 Normative References
3 Symbols
4 Identification Code
5 Main Structural Types (See Figures 1~4)
6 Boundary Dimensions
7 Technical Requirements
8 Test Methods
9 Inspection Rules
10 Marking
11 Rustproof Packaging
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.
JB/T 5389 Rolling Bearings - Roller Bearings for Rolling Mills has two parts:
——Part 1: Four-row Cylindrical Roller Bearings;
——Part 2: Double-row and Four-row Tapered Roller Bearings.
This part is Part 2 of JB/T 5389.
This part is developed in accordance with the rules given in GB/T 1.1-2009.
This part replaces JB/T 5389.2-2005 Rolling Bearings - Double-row and Four-row Tapered Roller Bearings for Rolling Mills.
In addition to editorial changes, the following main technical changes have been made with respect to JB/T 5389.2-2005:
——the name of the standard (see the cover and front page of this edition as well as those of 2005 edition) is modified;
——the code and successive sequence and content of main structural types are adjusted, (see Chapters 4 and 5; Chapters 4 and 5 of 2005 edition);
——the structural types and boundary dimensions of Type 370000 and Type 370000D bearings are added (see Figures 2 and 3 and Table 1);
——the technical requirements for surface roughness and appearance quality are added (see Chapter 7);
——the inspection for rotating flexibility and appearance quality is added (see Chapter 8);
——the content of rustproof packaging is specified in a separate chapter (see Chapter 11; 9.2 of 2005 edition).
This part was proposed by China Machinery Industry Federation.
This part is under the jurisdiction of the National Technical Committee on Rolling Bearing of Standardization Administration of China (SAC/TC 98).
The previous editions of this part are as follows:
——JB/T 5389.2-1995, JB/T 5389.2-2005.
Rolling Bearings - Roller Bearings for Rolling Mills - Part 2: Double-row and Four-row Tapered Roller Bearings
1 Scope
This part of JB/T 5389 specifies the main identification codes, structural types, boundary dimensions, technical specifications, inspection methods, inspection rules and marking and rustproof packaging of double-row tapered roller bearings for rolling mills (hereinafter referred to as the “double-row bearing”) and the four-row tapered roller bearings for rolling mills (hereinafter referred to as the “four-row bearing”).
This part is applicable to the production, inspection and acceptance of double-row and four-row tapered roller bearings for rolling mills.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated reference, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 272 Rolling Bearing - Identification Code
GB/T 299-2008 Rolling Bearings - Metric Double Row Tapered Roller Bearings - Boundary Dimensions
GB/T 300-2008 Rolling Bearings - Four Row tapered Roller Bearings - Boundary Dimensions
GB/T 307.2-2005 Rolling Bearings - Measuring and Gauging Principles and Methods
GB/T 307.3-2005 Rolling Bearings - General Technical Regulations
GB/T 699-2015 Quality Carbon Structure Steel
GB/T 711-2008 Hot-rolled Quality Carbon Structural Steel Plates, Sheets and Wide Strips
GB/T 3203-2016 Specification for Carburizing Steels of Bearings
GB/T 4199-2003 Rolling Bearings - Tolerances - Definitions
GB/T 7811-2015 Rolling Bearings - Symbols for Physical Quantities
GB/T 8597-2013 Rolling Bearings - Rust Proof Packaging
GB/T 13237-2013 Cold Rolled Quality Carbon Structural Steel Sheets and Strips
GB/T 18254-2016 High-carbon Chromium Bearing Steel
GB/T 24605-2009 Rolling Bearings - Marking for Products
GB/T 24608-2009 Inspection Rules for Rolling Bearings and Commercial Parts
JB/T 1255-2014 Rolling Bearings - Parts Made from High-carbon Chromium Bearing Steels - Specifications for Heat Treatment
JB/T 7051-2006 Rolling Bearing Parts - Methods for the Measurement and Assessment of Surface Roughness
JB/T 8236-2010 Rolling Bearings - Internal Clearances and Adjusting Methods for Double-row and Four-row Tapered Roller Bearings
JB/T 8881-2011 Rolling Bearings - Carburizing Heat - Treatment for Parts - Specifications
JB/T 10336-2017 Rolling Bearings - Supplementary Specifications
3 Symbols
For the purposes of this document, the symbols given in GB/T 4199-2003 and GB/T 7811-2015 and the following apply.
D1mp max-D2mp min: the difference between the maximum and minimum mean outside diameters of the outer rings of a bearing.
d1mp max-d2mp min: the difference between the maximum and minimum mean bore diameters of the inner rings of a bearing.
r: the nominal chamfer of inner ring
rsmin: the minimum single chamfer dimension of inner ring
r1: the nominal chamfer of outer ring
r1min: the minimum single chamfer dimension of outer ring
T3: the width of Type 370000 and Type 370000D double-row tapered roller bearings (assembly)
4 Identification Code
The identification code of bearings shall be in accordance with those specified in GB/T 272.
5 Main Structural Types (See Figures 1~4)
Figure 1 Double-row Tapered Roller Bearing
Type 350000 Figure 2 Double-row Tapered Roller Bearing
Type 370000
Figure 3 Double-row Tapered Roller Bearing
Type 370000D Figure 4 Four-row Tapered Roller Bearing
Type 380000
6 Boundary Dimensions
6.1 The boundary dimension of double-row tapered roller bearing of Type 350000 shall be in accordance with those specified in GB/T 299-2008.
6.2 The boundary dimensions of double-row tapered roller bearings of Type 370000 and Type 370000D are detailed in Table 1.
6.3 The boundary dimension of four-row tapered roller bearing of Type 380000 shall be in accordance with those specified in GB/T 300-2008.
Table 1 Boundary Dimensions of Bearings of Type 370000 and Type 370000D In: mm
Bearing type d D T3 B rsmin r1smin
Type 370000 Type 370000D
374032X2
374934X2
374134X3
373334X2
375236X1
372336X3
373138
373138X2
374140
374240X2
374240X3
372440X3
373142X2
373342X2
372442X3
373144X1
373248X3
374152X3
373152X3
374152X1
374956X3
370657
370658
373260X3
372060X3
373160
374160X3
370661
370661X1
374264X3
370666
374168
374272X3
373276X1
370678
374180X2
370682
373088X2
370690
370690X3
373092X3
374092X2
3731/500X3
3741/500X3
3706/510
3749/530X2
3740/530X1
3706/570
3706/580
3740/600X2
3741/630
3706/635
3706/690
3758/710X3
3706/724 374032X2D
374934X2D
374134X3D
373334X2D
375236X1D
372336X3D
373138D
373138X2D
374140D
374240X2D
374240X3D
372440X3D
373142X2D
373342X2D
372442X3D
373144X1D
373248X3D
374152X3D
373152X3D
374152X1D
374956X3D
370657D
370658D
373260X3D
372060X3D
373160D
374160X3D
370661D
370661X1D
374264X3D
370666D
374168D
374272X3D
373276X1D
370678D
374180X2D
370682D
373088X2D
370690D
370690X3D
373092X3D
374092X2D
3731/500X3D
3741/500X3D
3706/510D
3749/530X2D
3740/530X1D
3706/570D
3706/580D
3740/600X2D
3741/630D
3706/635D
3706/690D
3758/710X3D
3706/724D 160
170
170
170
180
180
190
190
200
200
200
200
210
210
210
220
240
260
260
260
280
285
290
300
300
300
300
305
305
320
330
340
360
380
390
400
410
440
450
450
460
460
500
500
510
530
530
570
580
600
630
635
690
710
724 240
230
295
360
330
400
320
320
340
360
380
460
355
440
480
360
460
420
459
500
389.5
380
450
560
440
500
520
500
560
620
540
580
680
650
570
650
580
650
820
830
655
680
820
870
733.5
710
730
750
830
870
1030
939.8
980
900
915 76
65
100
160
190
232
104
114
140
170
180
260
127
244
230
120
140
170
155
180
92
92
180
170
105
160
210
200
200
282
176
243
330
240
200
240
160
150
300
320
184
230
256
340
200
190
250
240
280
270
400
304.8
355
197
187 76
65
100
160
190
232
104
114
140
170
180
260
127
244
230
120
140
170
155
180
92
92
180
170
105
160
210
200
200
282
176
243
330
240
200
240
160
150
300
320
184
230
256
340
200
190
250
240
280
270
400
304.8
355
197
187 1.5
0.7
2.5
2.5
1.5
5
3
3
3
1.5
1.5
6
5
5
6
3
5
5
5
5
4
1
3
5
4
4
6
4.3
6
2.5
5
4
4
3
5
6
7
6
7.5
7.5
2.5
4
7.5
6
3.3
5
6
6
3
6
3.3
3.2
6.5
3
5 3
2
4
4
5
4
3
3
3
4
4
5
3
6
6
4
5
5
4
5
4
2.5
4
5
4
5
5
6
5
5
5
4
7.5
6
5
6
4
6
7.5
7.5
6
4
7.5
9.5
3.3
5
6
6
6
6
6.4
6.4
6.5
6
5
Contents of JB/T 5389.2-2017
Foreword I
1 Scope
2 Normative References
3 Symbols
4 Identification Code
5 Main Structural Types (See Figures 1~4)
6 Boundary Dimensions
7 Technical Requirements
8 Test Methods
9 Inspection Rules
10 Marking
11 Rustproof Packaging
