JB/T 7919.2-1999 This standard adopts ISO 2982-1:1995 "Tapered Bushings for Rolling Bearing Accessories" in a non-equivalent manner. At the same time, it supplements the technical contents not specified by ISO. This standard is a revision and merger of three standards: JB/T 7919.2-95 "Basic Dimensions of Adapter Sleeves for Rolling Bearing Accessories", JB/T 7919.3-95 "Basic Dimensions of Adapter Sleeves for Rolling Bearing Accessories" and JB/T 7919.7-95 "Technical Conditions for Tapered Bushings, Lock Nuts and Lock Washers for Rolling Bearing Accessories" (Part). During the revision, the adapter sleeve series and the size range of the adapter sleeve were expanded, and the adapter sleeve and adapter sleeve series were added; the tolerances of the large size segment were supplemented. This standard specifies the structure and size of the adapter sleeve composed of the adapter sleeve, lock nut and lock washer or lock card. This standard also specifies the technical requirements for the structure, size and tolerance of the adapter sleeve used for the adapter sleeve. This standard applies to the design, production, inspection and user acceptance of adapter sleeves and bushings for rolling bearings whose dimension series conform to GB/T 273.3-1988 "General Scheme for Rolling Bearings and Radial Bearings". JB/T 7919.2-1999 Rolling Bearing Accessories Adapter Sleeves JB/T7919.2-1999 Standard download decompression password: www.bzxz.net

1CS 21.100.20
Mechanical Industry Standard of the People's Republic of China
JB/F7919.2-1999
neqIso2982-1:1995
Rolling bearings
Accessories-Adapter sleeves
Rollingbearings—-Accessories-Adapter sleeves1999-06-28 Issued
National Machinery Industry Bureau
2000-01-01 Implementation
JB/T7919.2-1999
Cited Standards
3 Terms
5 Code Method
6 Marking
7 Dimensions
Technical Requirements
Measurement Method
Inspection Rules
Appendix A (Appendix to the Standard)
Appendix B (Appendix to the Standard)
Measurement Method
Corresponding Relationship between Adapter Sleeves and Their Components Table 19
JB/T7919.2—1999
This standard is not equivalent to 1SO2982-1:1995 "Dimensional Bushings for Rolling Bearing Accessories". The standard supplements the technical conditions that are not in the international standard.
This standard is a revision of JB/T7919.2-95 "Basic Dimensions of Adapter Sleeves for Rolling Bearing Accessories" and JB/T7919.3-95 "Basic Dimensions of Adapter Bushings for Rolling Bearing Accessories", and partially replaces JB/T7919.7-95 "Technical Conditions for Tapered Bushings, Locking Nuts and Locking Washers for Rolling Bearing Accessories".
Compared with JB/T7919.2-95 and JB/T7919.3-95, this standard mainly makes the following modifications: - The relevant contents of JB/T7919.7-95 are incorporated into this standard; - The size range of adapter sleeves H30, H31, H32 series and adapter sleeves A30, A31, A32 is expanded, and H39 series adapter sleeves and A39 series adapter bushings are added; - The tolerances of large size segments are supplemented.
This standard replaces JB/T7919.2-95, JB/T7919.3-95, JB/T7919.7-95 (part) from the date of implementation. Appendix A and Appendix B of this standard are both standard appendices. This standard is proposed and managed by the National Technical Committee for Standardization of Rolling Bearings. The unit of this standard is Luoyang Bearing Research Institute. The main drafters of this standard are Chen Yuan, Guo Baoxia, and Li Feixue. 1 Scope
Machinery Industry Standard of the People's Republic of China
Rolling bearings
Accessories--Adapter sleeves
Rolling bearings-Accessories--Adapter sleevesJB/T7919.2-1999
neg IsO 2982-1: 1995
Replaces JB/T7919.2-95
JB/T 7919.3-95
Partially replaces JB/T7919.7-95
This standard specifies the structure and dimensions of the adapter sleeve (referred to as the adapter sleeve) composed of an adapter bushing, a locking nut and a locking washer or a locking card. This standard also specifies the technical requirements for the structure, dimensions and tolerance of the adapter sleeve used for the adapter sleeve. This standard applies to the design, production, inspection and user acceptance of adapter sleeves and adapter bushings for rolling bearings whose dimension series conform to GB/T273.3.
2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are all 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 192—1981
GB/T 196-1981
GB/T 272—1993
GB/T 273.3—1988
GB/T 275—1993
GB/T 307.2—1995
GB/T 6991988
GB/T 18041992
GB/T 2516—1981
GB/T5796.1—1986
GB/T5796.3—1986
GB/T 5796.4—1986
GB/T 6930—1986
GB/T 85971988
JB/T 3574—1997
JB/T8921—1999
3 Terminology
Basic tooth profile of common butterfly thread
Basic dimensions of common thread (diameter 1~600mm)Code method for rolling bearings
General scheme of outer dimensions of radial bearingsFitness of rolling bearings with shafts and housings
Principles and methods of measurement and inspection of rolling bearingsTechnical conditions for high-quality carbon structural steel
General toleranceUnindicated tolerances of linear dimensions
Table of deviations of common thread (diameter 1~355mm)Trapezoidal thread tooth profile
Basic dimensions of trapezoidal thread
Trapezoidal thread
Vocabulary of rolling bearings
Packaging of rolling bearings
Product marking of rolling bearings
Inspection rules for rolling bearings and their commodity partsThe terms used in this standard conform to the provisions of GB/T6930. Approved by the State Bureau of Machinery Industry on June 28, 1999 and implemented on January 1, 2000
4 Symbols
4.1 Symbol for adapter sleeve (see Figure 1)
d: Nominal inner diameter of bearing
d: Nominal inner diameter of adapter sleeve
d: Outer diameter of adapter sleeve locking nut
B: Nominal width of adapter sleeve
B: Distance between locking nut and bearing end faceB: Distance between locking screw and bearing end face1 bearing: 2-locking washer
3 locking nut: 4-adapter sleeve
4.2 Symbol for adapter sleeve (see Figure 2)
d: Adaptor sleeve adapter Nominal inner diameter of bearing
d,: nominal inner diameter of bushing
G: butterfly pattern
B,: nominal width of bushing
D,: outer diameter of large end of bushing (calculated value)d: diameter of small end of cone of bushing
D: diameter of overrun groove of bushing (reference value)D: middle diameter of circular surface of bushingJB/T7919.2—1999
1-withdrawal bearing:
2-key nut:
4-locking card:
Figure 1 Adapter sleeve
3-locking end nail:
5 Adapter sleeve
JB/T 7919.2—1999
α: The sum of the thread length of the locking bushing and the width of the overrunning groove b: The locking groove width of the locking bushing
: The narrow groove width of the locking bushing
g: The length of the narrow groove locking bushing
r: The chamfer size of the inner hole of the locking bushing
rn: The minimum one-way chamfer size
Ad.: The average inner diameter deviation of the locking bushing in a single plane 4B: The cumulative bushing width deviation
Aa,: The length deviation of a
Ab: The locking groove width deviation of the locking bushing
Af: The narrow groove width of the locking bushing Deviation
AD: Deviation of the large end diameter of the cone of the adapter bushing ADm-dm: Deviation of the cone angle of the cone surface of the adapter bushing Kp: Radial runout of the cone surface of the adapter bushing to the inner hole Vpep: Variation of the single radial plane of the adapter bushing D, Vai: Variation of the inner diameter of the adapter bushing
Figure 2 Adapter bushing
5 Code method
5.1 Cumulative code method of adapter bushing
JB/T7919.2-1999
The adapter bushing code consists of the type code, size series code and the nominal inner diameter code of the applicable bearing, and is arranged in this order. 5.1.1 The type code is represented by the letter H.
5.1.2 The dimension series code is divided into 02, 03, 30, 3I, 23, 32 and 39 dimension series according to the provisions of the bearing dimension series code in GB/T272.
5.1.3 The inner diameter code is divided into 02, 03, 30, 3I, 23, 32 and 39 dimension series according to the provisions of the bearing inner diameter code in GB/T272: 5.1.4 Example:
The nominal inner diameter code of the bearing applicable to the adapter sleeve (the nominal inner diameter is 40mm) Dimension series code (the width series code 0 is omitted) Adapter sleeve type code
The nominal inner diameter code of the bearing applicable to the adapter sleeve Dimension series code
Adapter sleeve type code
5.2 Code method for adapter sleeves
Codes for adapter sleeves consist of type code, size series code, and the nominal inner diameter code and structure code of the applicable bearing, and are arranged in this order.
5.2.1 Type code is represented by letter A.
5.2.2 The dimension series code is the same as the method for representing adapter sleeves. 5. 2. 3
The inner diameter code is the same as the method for representing adapter sleeves. 5.2.4 No structure code indicates narrow groove, and X indicates wide groove. 5.2.5 Example:
Adapter sleeve Applicable bearing nominal inner diameter code (nominal inner diameter is 40mm) Size series code (width series code 0 is omitted) Adapter sleeve type code
6 Marking
Marking example:
JB/T7919.2—1999
Adapter sleeve Applicable bearing nominal inner diameter code Size series code
Adapter sleeve type code
Applicable bearing inner diameter 40mm, size series 23 adapter sleeve, marked as: 8JB/T7919.21999
Applicable bearing inner diameter 40mm, size series 23 adapter sleeve, marked as: 8JB/T7919.2—1999
7 Dimensions
1 The dimensions of the adapter sleeve shall comply with the provisions of Tables 1 to 7. 7.1
Table 1 H2 series
Clamping padwww.bzxz.net
Applicable bearing model
Xunxinmai bearing
1203 K
1204 k
1209 K
Clamping sleeve
Self-aligning ball bearing
1203 K
1204 K
1205 K
Clamping sleeve
JB/T7919.2—1999
Table 2 H3 series
Table 3 H30 series
Applicable bearing model
Self-aligning ball bearing
2202 K
2203 K
2220 k
Center bearing
21304K
21305K
21306K
21307K
21308K
21309K
21310K
21311K
21312K
21313 K
21314K
21315K
21316K
21317K
21319K
21320K
21322K
22208K
22209K
22210K|| tt||22211 K
22212K
22213K
22214K
22215K
22216K
22217K
22218K
22219K
22220K
22222K
Applicable bearing type No.
Spherical roller bearing
23024K
23026K
23028K
23030K
23032K
23034K
23036K
23038K
23040K
23044K
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