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 GB/T 3882-1995 Rolling bearings—Insert bearings and eccentric looking collars—Boundary dimensions and the following main technical changes have been made with respect to GB/T 3882-1995:
——Some normative references are added and modified (see clause 2 hereof; clause 2 of Edition 1995);
——The definition of “insert bearing” is modified (see clause 3 hereof; clause 3 of Edition 1995);
——The font and part of description of the symbol are modified (see clause 4 hereof; clause 4 of Edition 1995);
——The description of the characteristics of insert bearings is modified (see clause 5 hereof, clause 5 of Edition 1995);
——The clauses of “code” and “Designation example” are added (see clauses 6 and 7 hereof);
——The models and boundary dimensions of insert bearings of inch bore diameter and eccentric locking collars are added (see Tables 1-11);
——The size range of insert bearings with eccentric locking collars is expanded and some boundary dimensions are modified (see Tables 1-3 hereof, Tables 6-8 of Edition 1995);
——Some boundary dimensions of insert bearings with jackscrew are modified (see Tables 4-6 hereof, Tables 1-3 of Edition 1995);
——Some boundary dimensions of insert bearing with tapered hole and adapter sleeve are modified (see Tables 7-8 hereof, Tables 4-5 of Edition 1995);
——The size range of inner ring eccentric extension is expanded and some boundary dimensions are modified (see Table 9 hereof, Table 9 of Edition 1995);
——The size range of eccentric locking collars is expanded and some boundary dimensions are modified (see Tables 10-11 hereof, Tables 10-11 of Edition 1995);
——Dimensions of lubrication zone of insert bearings are modified (see Tables 1-8 hereof, Tables 1-8 of Edition 1995).
This standard is redrafted by reference to, but is not equivalent to ISO 9628: 2006 Rolling bearings-Insert bearings and eccentric looking collars-Boundary dimensions and tolerance and ISO 9628: 2006/Amd.1: 2011: Diameter series.
This standard was proposed by the China Machinery Industry Federation.
This standard is under the jurisdiction of the National Technical Committee on Rolling Bearing of Standardization Administration of China (SAT/TC 98).
The previous editions of this standard are as follows:
——GB 3882.1~3882.3-1983;
——GB 3882-1987, GB/T3882-1995.
Rolling bearings—Insert bearings and eccentric looking collars—
Boundary dimensions
1 Scope
This standard specifies the characteristics and boundary dimensions of insert bearings (bearings for short) and eccentric locking collars.
This standard is applicable to the design and selection of bearings.
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 (including any amendments) applies.
GB/T 273.3 Rolling bearings—Boundary dimensions, general plan—
Part 3: Radial bearings
GB/T 4199 Rolling bearings—Tolerances—Definitions
GB/T 6930 Rolling bearings—Vocabulary
GB/T 7811 Rolling bearings—Symbols for physical quantities
GB/T 27554 Rolling bearings—Insert bearing units—Identification code
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 4199, and GB 6930 and the following apply.
3.1
insert bearing
radial rolling bearing with a spherical outside surface and an extended inner ring with a locking device
Note: The locking device, used for fixing the inner ring to the shaft, may be an eccentric locking collar or an adapter sleeve or jackscrew directly in the inner ring.
4 Symbols
For the purposes of this document, the symbols given in GB/T 7811 and the following apply.
The symbols (except those for tolerances) shown in Figures 1 to 8 and the values given in Tables 1 to 11 denote nominal dimensions unless specified otherwise.
Note: Figures 1 to 8 are drawn schematically and cages are not shown.
A: width of eccentric surface of inner ring
A1: width of eccentric surface of eccentric locking collar
B: width of inner ring
B1: overall width of inner ring including eccentric locking collar
B2: width of eccentric locking collar
B3: width of adapter sleeve
C: width of outer ring
C1: distance from centre of outer ring to centre of lubrication zone
C2: width of lubrication zone
D: outside diameter of bearing
d: bore diameter of bearing and of eccentric locking collar
ds: jackscrew diameter
dz: small bore diameter of inner ring taper hole
d0: bore diameter of adapter sleeve
d1: outside diameter of eccentric locking collar
d2: small bore diameter of eccentric surface (at theoretical sharp corner) of eccentric locking collar
d3: large diameter of eccentric surface (at theoretical sharp corner) of inner ring
H: eccentricity of inner ring eccentric extension and of eccentric locking collar
r1: chamfer dimension of eccentric surface of inner ring
r1smin: smallest single chamfer dimension of eccentric surface of inner ring
r2: fillet radius of eccentric surface of inner ring
r2smax: largest single fillet radius of eccentric surface of inner ring
r3: fillet radius of eccentric surface of eccentric locking collar
r3smax: largest single fillet radius of eccentric surface of eccentric locking collar
r4: chamfer dimension of eccentric surface of eccentric locking collar
rr4smin: smallest single chamfer dimension of eccentric surface of eccentric locking collar
S: distance from centre of raceway to face of inner ring on side opposite locking device
S1: distance from centre of raceway to face of inner ring or eccentric locking collar limiting overall bearing width on locking device side
Figure 1 Insert bearings with eccentric locking collar (UEL)
Figure 2 Light insert bearings with eccentric sleeve (UE)
Figure 3 Insert bearings with jackscrew (UC)
Figure 4 Insert bearings with flat-end jackscrew (UB)
Figure 5 Insert bearings with tapered bore (UK)
Figure 6 Insert bearings with adapter sleeve (UK + H)
Figure 7 Eccentric extension of inner ring
Note: The relative angular position of the plain and tapped holes to each other and to the eccentricity is optional.
Figure 8 Eccentric locking collars
5 Characteristics
5.1 General
The bearings on one shaft are, as a rule, mounted in two or more separate housings, which are not always perfectly aligned. The outer ring has a spherical outside surface so that the bearing can be mounted in a housing with a matching spherical seating to accommodate permanent angular misalignment.
The bearing ring and the eccentric locking collar may be treated with a surface treatment to reduce corrosion during operation.
5.2 Bore diameter
For each bearing or eccentric locking collar, it is generally common to have one metric and several inch inner ring bore sizes. The non-preferred inch bore sizes, which are given in parentheses in Tables 1,3,4 shall be avoided whenever possible.
Contrary to general rolling bearing practice, the inner ring bore diameter tolerance is on the plus side of the nominal bore diameter, in order that the bearing and collar can be slipped over standard size shafting.
5.3 Outside diameter of bearing
The outside diameter (with respect to metric bore diameter, taking 40 mm except those less than 40 mm) of the bearing of series 2 and 3 corresponds to the diameter series 2 and 3 of GB/T 273.3 respectively.
5.4 Width of inner ring and locking device
The inner ring width (with respect to the metric bore diameter) does not conform to the requirements of dimension series 2 and 3 of GB/T 273.3. It is determined by the requirements of space for sealing and locking devices and by the axial extension of the shaft support considered suitable for various applications.
Where the locking device extends axially beyond the inner ring, the width over the locking device, called the overall width, and the location with respect to the outer ring centreline of the side face limiting the overall width, are important dimensions. Each of Figures 1 to 6 shows one example only of locking device design.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Characteristics
6 Code
7 Designation example
8 Boundary dimension
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 GB/T 3882-1995 Rolling bearings—Insert bearings and eccentric looking collars—Boundary dimensions and the following main technical changes have been made with respect to GB/T 3882-1995:
——Some normative references are added and modified (see clause 2 hereof; clause 2 of Edition 1995);
——The definition of “insert bearing” is modified (see clause 3 hereof; clause 3 of Edition 1995);
——The font and part of description of the symbol are modified (see clause 4 hereof; clause 4 of Edition 1995);
——The description of the characteristics of insert bearings is modified (see clause 5 hereof, clause 5 of Edition 1995);
——The clauses of “code” and “Designation example” are added (see clauses 6 and 7 hereof);
——The models and boundary dimensions of insert bearings of inch bore diameter and eccentric locking collars are added (see Tables 1-11);
——The size range of insert bearings with eccentric locking collars is expanded and some boundary dimensions are modified (see Tables 1-3 hereof, Tables 6-8 of Edition 1995);
——Some boundary dimensions of insert bearings with jackscrew are modified (see Tables 4-6 hereof, Tables 1-3 of Edition 1995);
——Some boundary dimensions of insert bearing with tapered hole and adapter sleeve are modified (see Tables 7-8 hereof, Tables 4-5 of Edition 1995);
——The size range of inner ring eccentric extension is expanded and some boundary dimensions are modified (see Table 9 hereof, Table 9 of Edition 1995);
——The size range of eccentric locking collars is expanded and some boundary dimensions are modified (see Tables 10-11 hereof, Tables 10-11 of Edition 1995);
——Dimensions of lubrication zone of insert bearings are modified (see Tables 1-8 hereof, Tables 1-8 of Edition 1995).
This standard is redrafted by reference to, but is not equivalent to ISO 9628: 2006 Rolling bearings-Insert bearings and eccentric looking collars-Boundary dimensions and tolerance and ISO 9628: 2006/Amd.1: 2011: Diameter series.
This standard was proposed by the China Machinery Industry Federation.
This standard is under the jurisdiction of the National Technical Committee on Rolling Bearing of Standardization Administration of China (SAT/TC 98).
The previous editions of this standard are as follows:
——GB 3882.1~3882.3-1983;
——GB 3882-1987, GB/T3882-1995.
Rolling bearings—Insert bearings and eccentric looking collars—
Boundary dimensions
1 Scope
This standard specifies the characteristics and boundary dimensions of insert bearings (bearings for short) and eccentric locking collars.
This standard is applicable to the design and selection of bearings.
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 (including any amendments) applies.
GB/T 273.3 Rolling bearings—Boundary dimensions, general plan—
Part 3: Radial bearings
GB/T 4199 Rolling bearings—Tolerances—Definitions
GB/T 6930 Rolling bearings—Vocabulary
GB/T 7811 Rolling bearings—Symbols for physical quantities
GB/T 27554 Rolling bearings—Insert bearing units—Identification code
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 4199, and GB 6930 and the following apply.
3.1
insert bearing
radial rolling bearing with a spherical outside surface and an extended inner ring with a locking device
Note: The locking device, used for fixing the inner ring to the shaft, may be an eccentric locking collar or an adapter sleeve or jackscrew directly in the inner ring.
4 Symbols
For the purposes of this document, the symbols given in GB/T 7811 and the following apply.
The symbols (except those for tolerances) shown in Figures 1 to 8 and the values given in Tables 1 to 11 denote nominal dimensions unless specified otherwise.
Note: Figures 1 to 8 are drawn schematically and cages are not shown.
A: width of eccentric surface of inner ring
A1: width of eccentric surface of eccentric locking collar
B: width of inner ring
B1: overall width of inner ring including eccentric locking collar
B2: width of eccentric locking collar
B3: width of adapter sleeve
C: width of outer ring
C1: distance from centre of outer ring to centre of lubrication zone
C2: width of lubrication zone
D: outside diameter of bearing
d: bore diameter of bearing and of eccentric locking collar
ds: jackscrew diameter
dz: small bore diameter of inner ring taper hole
d0: bore diameter of adapter sleeve
d1: outside diameter of eccentric locking collar
d2: small bore diameter of eccentric surface (at theoretical sharp corner) of eccentric locking collar
d3: large diameter of eccentric surface (at theoretical sharp corner) of inner ring
H: eccentricity of inner ring eccentric extension and of eccentric locking collar
r1: chamfer dimension of eccentric surface of inner ring
r1smin: smallest single chamfer dimension of eccentric surface of inner ring
r2: fillet radius of eccentric surface of inner ring
r2smax: largest single fillet radius of eccentric surface of inner ring
r3: fillet radius of eccentric surface of eccentric locking collar
r3smax: largest single fillet radius of eccentric surface of eccentric locking collar
r4: chamfer dimension of eccentric surface of eccentric locking collar
rr4smin: smallest single chamfer dimension of eccentric surface of eccentric locking collar
S: distance from centre of raceway to face of inner ring on side opposite locking device
S1: distance from centre of raceway to face of inner ring or eccentric locking collar limiting overall bearing width on locking device side
Figure 1 Insert bearings with eccentric locking collar (UEL)
Figure 2 Light insert bearings with eccentric sleeve (UE)
Figure 3 Insert bearings with jackscrew (UC)
Figure 4 Insert bearings with flat-end jackscrew (UB)
Figure 5 Insert bearings with tapered bore (UK)
Figure 6 Insert bearings with adapter sleeve (UK + H)
Figure 7 Eccentric extension of inner ring
Note: The relative angular position of the plain and tapped holes to each other and to the eccentricity is optional.
Figure 8 Eccentric locking collars
5 Characteristics
5.1 General
The bearings on one shaft are, as a rule, mounted in two or more separate housings, which are not always perfectly aligned. The outer ring has a spherical outside surface so that the bearing can be mounted in a housing with a matching spherical seating to accommodate permanent angular misalignment.
The bearing ring and the eccentric locking collar may be treated with a surface treatment to reduce corrosion during operation.
5.2 Bore diameter
For each bearing or eccentric locking collar, it is generally common to have one metric and several inch inner ring bore sizes. The non-preferred inch bore sizes, which are given in parentheses in Tables 1,3,4 shall be avoided whenever possible.
Contrary to general rolling bearing practice, the inner ring bore diameter tolerance is on the plus side of the nominal bore diameter, in order that the bearing and collar can be slipped over standard size shafting.
5.3 Outside diameter of bearing
The outside diameter (with respect to metric bore diameter, taking 40 mm except those less than 40 mm) of the bearing of series 2 and 3 corresponds to the diameter series 2 and 3 of GB/T 273.3 respectively.
5.4 Width of inner ring and locking device
The inner ring width (with respect to the metric bore diameter) does not conform to the requirements of dimension series 2 and 3 of GB/T 273.3. It is determined by the requirements of space for sealing and locking devices and by the axial extension of the shaft support considered suitable for various applications.
Where the locking device extends axially beyond the inner ring, the width over the locking device, called the overall width, and the location with respect to the outer ring centreline of the side face limiting the overall width, are important dimensions. Each of Figures 1 to 6 shows one example only of locking device design.
Contents of GB/T 3882-2017
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Characteristics
6 Code
7 Designation example
8 Boundary dimension
