This standard specifies the rolling bearing codes not specified in GB/T 272-1993 and is a supplement to GB/T 272-1993. This standard is applicable to general purpose bearings. JB/T 2974-2004 Supplementary provisions for the rolling bearing code method JB/T2974-2004 Standard download decompression password: www.bzxz.net

ICS 21.100.20
Machinery Industry Standard of the People's Republic of China
JB/T2974--2004
Replaces JB/T2974-1993
Rolling bearings
Supplementary regulations for the code method
Rolling bearings Identification code-Supplemental regulations2004-02-10 Issued
Implementation on 2004-06-01
Published by the National Development and Reform Commission of the People's Republic of ChinaForeword,
Normative references,
General purpose bearing code
4 Bearings with accessories.
5 Special bearing code..
6 Non-standard bearing code,
Appendix A
(Normative Appendix) Not compiledRetain Appendix B (Normative Appendix) for bearings with post-frame codes
B.1 Scope..
B.2 Bearing codes
Appendix C (Normative Appendix)
C.1 Scope
C.2 Code composition,
Other representations
Special bearing codes
Non-standard bearing code compilation method
JB/T2974—2004
This standard replaces JB/T2974-1993 "Supplementary Provisions on Rolling Bearing Code Method". Compared with JB/T2974-1993, the main changes of this standard are as follows: JB/T2974--2004
--Added ten types of cylindrical roller bearings and corresponding codes, and added type code 76 of thrust angular contact ball bearings (see Table 1);
Changed "needle roller and thrust ball combination bearings (same outer diameter)" in Table 2 to "needle roller and full complement thrust ball combination bearings with outer cover (oil lubrication)" (see 1993 edition and this edition - The "α=45°" in the suffix code D is deleted, and the meaning of the subsequent code Z is added with "needle roller and full complement thrust ball bearing with outer cover, Z is grease lubrication" (see Table 5 of this edition and the 1993 edition); - The code ZA for zinc-aluminum alloy cage materials and the code D3 for low-temperature carbonitriding cage are added, and F1, F2,.F3, F4, Q1, Q2, Q3, Q4, L1, L2, TN1, TN2, TN3, TN4, T NS Code for specific cage materials (see 3.2.2.3 of this standard and the 1993 edition);
- Added the universal bearing configuration code /G (see 3.2.2.7 of this edition); Added the code /CS for carbon structural steel and the code /HV2 for GCr18Mo for bearing parts (see Table 6); Added the motor bearing clearance code /CM (see Table 8); - Added the codes IZ4, N4, IZP3, IZP4, /VP3, N P4, deleted the codes YA1~YA5, YB1~YB4 (see Table 9 of this edition and 1993 edition):
Change the cage material of three-point and four-point contact ball bearings without codes from "aluminum" to "copper" (see Appendix A of this edition and 1993 edition):
-Added the codes and corresponding reference standards of some special bearings (see the normative reference documents and Appendix B of this edition): Deleted Appendix D (Appendix D of 1993 edition). Appendix A, Appendix B and Appendix C of this standard are normative appendices. This standard is proposed by China Machinery Industry Federation. This standard is under the jurisdiction of the National Technical Committee for Standardization of Rolling Bearings (CSBTS/TC98). Drafting units of this standard: Luoyang Bearing Research Institute, Luoyang Bearing Group Co., Ltd., Wafangdian Bearing Group Co., Ltd., Suzhou Bearing Factory Co., Ltd., Shanghai Tianan Bearing Co., Ltd. The main drafters of this standard: Guo Baoxia, Chang Hong, Liang Qingfu, Gu Chaoyang, Yu Shuhua. The previous versions of the standards replaced by this standard are: JB2974-1981, JB/T2974-1993. E
1 Scope
Supplementary provisions for code method
Rolling bearings
JB/T2974-2004
This standard specifies the code of rolling bearings (hereinafter referred to as bearings) not specified in GB/T272-1993, and is a supplement to GB/T272-1993.
This standard applies to general purpose bearings. 2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For all dated references, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties to the agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For all undated references, the latest versions are applicable to this standard. GB/T272—1993 Rolling bearing code method 3 Rolling bearings Tapered roller bearings General plan for overall dimensions (neq1ISO355:1977) GB/T 273.1—2003
GB/T273.2—1998
Rolling bearings
GB/T273.3—1999
GB/T292—1994
GB/T294—1994
GB/T299-1995
GB/T300—1995
GB/T5801-1994
Rolling bearings
General plan for overall dimensions of thrust bearings (eqvISO104:1994) General plan for overall dimensions of radial bearings (eqvISo15:1998) Angular contact ball bearing dimensions
Rolling bearings
Rolling bearings
Rolling bearings
Rolling bearings
Three-point and four-point contact ball bearing dimensionsDouble-row tapered roller bearing dimensions
Four-row tapered roller bearing dimensions
Rolling bearingsLight and medium series needle roller bearing dimensions and tolerances (neq1So1206:1982) GB/T6445.1—1996
GB/T12764—1991
GB/T166 43-1996
JB/T3122--1991
JB/T3123—-1991
JB/T3232--1994
JB/T3370—2002
JB/T3372—1992
JB/T3588—-1994
JB/T3632—1993
JB/T5312—2001
Outline dimensions of roller and needle bearings (negISO6278:1980) rolling bearings||tt| |Rolling bearings
Dimensional scheme for stamped outer ring needle roller bearings (neqISo3245:1974) Rolling bearings Needle roller and thrust cylindrical roller combination bearings Dimensional dimensions Rolling bearings Needle roller and thrust ball combination bearings Dimensional dimensions Rolling bearings Needle roller and angular contact ball combination bearings Dimensional dimensions Universal joint needle roller bearings
Rolling bearings Universal joint cylindrical roller bearings
Needle roller and cage assembly for connecting rod
Rolling bearings Full complement needle roller bearings Dimensional dimensions and tolerances Full complement tapered roller thrust bearings for rolling mill press mechanisms Release bearings and units for automobile clutches JB/T5389.1—1995
Rolling bearingsFour-row cylindrical roller bearings for rolling millsRolling bearingsDouble-direction thrust angular contact ball bearings for machine tool spindlesJB/T6362—1995
Thin-wall sealed bearings for robots
JB/T6636—1993
JB/T6640—1993
JB/T6644-1993
Code numbering method for seated spherical ball bearings
Rolling bearingsCombined needle roller and double-direction thrust cylindrical roller bearings Dimensions and tolerances JB/T7358--1994 Non-grinding ball bearings
Rolling bearings Double row full complement cylindrical roller bearings JB/T7754-1995
JB/T8563-1997
JB/T8564-1997
Rolling bearings Water pump shaft bearings
Thrust angular contact ball bearings for machine tool screws
Rolling bearings
JB/T2974-2004
JB/T8568- 1997
JB/T8717—1998
JB/T8721—1998
JB/T8722—1998
JB/T88772001
JB/T10188—2000
JB/T10189~--2000
JB/T10238-2001
3 General purpose bearing code
Cylindrical roller bearings for conveyor chains|| tt||Rolling bearings
Rolling bearings
Rolling bearings
Thrust angular contact ball bearings for steering gear
Magneto bearings
Rolling bearings
Bearings for coal mine conveying machinery
Technical conditions for rolling bearings and needle roller combination bearingsThrust bearings for automobile steering knuckles
Constant velocity universal joints and their assemblies for automobiles
Automobile wheel hub bearing units
The composition and arrangement of bearing codes shall comply with the provisions of GB/T272-1993. 3.1 Basic code
The basic code of bearings shall comply with the provisions of GB272~1993. General-purpose rolling bearings (except needle roller bearings) are composed of type code, size series indicating the outer dimensions of the bearing, and inner diameter code: The basic code of needle roller bearings is composed of type code and dimension indicating the matching and installation characteristics of the bearing. The size series code, inner diameter code and size code indicating the bearing matching and installation characteristics shall be in accordance with the provisions of GB/272-1993. The bearing types and sizes not included in GB/272-1993 shall be indicated by the size series, inner diameter code or the size indicating the bearing matching and installation characteristics. See Table 1 and Table 2.
Bearing type
Deep groove ball bearing with ball filling notch
Cylindrical roller bearing without flange
Cylindrical roller bearing with single flange and flat flange on the outer ring
Cylindrical roller bearing without flange but with flat flange on the inner ring
Cylindrical roller bearing without flange and double locking ring on the outer ring
Cylindrical roller bearing with single flange on the inner ring and large end face protruding on the outer ring
Type code
Dimension series code
Bearing code
NB0000
NFP0000
NJP0000
NCE.0000V
NJG 0000
Standard number
Bearing type
Outer ring single rib with locking ring
Caged cylindrical roller bearing
Flange ring without rib and outer ring with double
locking pattern without cage cylindrical
Roller bearing
Inner ring without rib but with double locking
Caged cylindrical roller
Bearing
Inner ring without rib and with flat
Retainerless double row
Cylindrical wave bearing
External with flat retaining rings on both sides
Double row cylindrical roller bearing
External with stop grid on both sides with
|Double inner circle without cage double row cylindrical roller bearing with sealing ring
Double row cylindrical roller bearing with single rib and single flat ring on outer ring
Double row cylindrical roller bearing without cage with double locking ring on outer ring
Double row cylindrical roller bearing with single rib and locking ring on outer ring
Double row cylindrical roller bearing with rib and double outer ring without cage
Table 1 (continued)
Type code
Dimension series code
JB/T2974-2004
t||Bearing code
NFL0000V
NBCL0000V
NUCL0000V
NNUP0000V
NNP0000
NNF0000
-2LSNV
NNFP0000
NNCL0000V
NNFL0000
NNC0000V
Standard number
JB/T2974—2004
Bearing type
Double row cylindrical roller without flange
Sub bearing| |tt||Double-row cylindrical roller bearings with single rib on inner ring
Four-row cylindrical roller bearings without ribs
Three-row cylindrical roller bearings without ribs
Without cage and flat ribs on both sides
Three-row cylindrical roller bearings
Four-row cylindrical roller bearings with ribs on outer ring
Single-row spherical roller bearings
Separable angular contact ball bearings
Separable angular contact ball bearings with inner ring
Angular contact ball bearings locked on inner ring
|Table 1 (Continued)
Type code
Dimension series code
Bearing code
NNB0000bzxZ.net
NNJ0000
NNOB0000
NNTB0000
NNTUP0000V
NNOP0000
S70000
SN70000
Standard number
GB/T292-
GB/T292--
Bearing type
Double half outer ring four-point contact
Ball bearings
Double half outer ring three-point contact
Ball bearings
Double half inner ring three-point contact
Ball bearings
Double inner ring double row tapered roller
Bearings
Double outer ring double row tapered roller
Bearings
Four row tapered roller bearings
Thrust angular contact ball bearings
Double or multi-row thrust cylindrical roller bearings
Double direction thrust cylindrical roller
Thrust tapered roller bearings
The numbers in ()\ should be omitted in the code representation. b The size series is different from GB/T272—1993. Table 1 (continued)
Type code
Dimension series code
JB/T2974-—2004
Bearing code
QJF0000
QJT0000
QJS0000
350000
370000
380000
560000
760000
234400
234700
234900
Standard No.
GB/T294—1994
GB/T299—1995
GB/T300-1995
JB/T8717-—1998
JB/T8564—1997
JB/T6362--1995
B/T10188—2000
B/T10188-2000
JB/T2974—2004
Bearing Type
Cage Assembly||tt| |Thrust hydraulic with stamped center sleeve
Needle and cage assembly
Needle roller bearings without inner ring (light series
Needle roller bearings without inner ring (heavy series
Needle roller bearings (light series)
Needle bearings (heavy series)
Needle roller bearings without flanges on the periphery
Full complement needle roller bearings
Perforated stamped outer ring full complement
Needle roller bearings
(1 series)
(2 series)
Sealed stamped outer ring full complement
Needle roller bearings
(1 series)||t t||(2 series)
Perforated stamped outer ring full of liquid
Needle bearing (grease limit)
(1 series)
(2 series)
Sealed stamped outer ring full of roller
Needle bearing (grease limit)
(1 series)
(2 series)
Needle roller and thrust cylindrical roller
Combined bearing
Combined bearing
Type code
Matching installation characteristics
Dimension representation
d×D×B
Use Size series code,
Inner diameter code indicates
Size series
Inner diameter code according to
GB/T272
Bearing code
NKId/B
NAOd-DB
NAV4000
NAV4800
NAV4900
MFH-FuB
FY-FuB
FY-FuR
MFYH-F,B
Standard number
GB/T58 01
GB/T5801
JB/T3588-
GB/T12764
GB/T16643-
Push-type roller
Needle roller bearings
Bearing types
Needle roller and thrust ball combination
Needle roller and full-filled thrust ball combination bearing with cover
(Oil lubrication)
Needle roller and angular contact ball combination
Combined bearings (single direction)
Needle roller and angular contact ball combination
Combined bearings (double direction) )
Needle roller and bidirectional thrust cylindrical roller combined bearings
Needle roller and
bidirectional thrust cylindrical roller
Combined bearings with flanges
Cylindrical roller and
bidirectional thrust needle roller combined bearings
Long cylindrical roller bearings
Long cylindrical roller bearings with double ribs on the outer diameter
Spherical needle roller bearings
Table 2 (continued)
Type code
Matching dimensions to be installed
Expression
Use size series code Indicated by size series code and inner diameter code. Indicated by size series code and inner diameter code according to GB/T272. Indicated by size series code and inner diameter code according to JB/T2974—2004. Bearing code NKIA5900 NKIB5900 ZARNdD ZARFdD NAO1.0000
PNAd'D
Standard No.
JB/T3122-
JB/T8877-
JB3123-
JB/T8877-
JB/T6644-
JB/T2974—2004
Bearing Type
Non-ribbed Roller Needle Roller
Roller with seals on both sides and double ribs on the outer ring
Needle Roller Bearing
Flat rib roller needle roller
(Light series)
(Heavy series)|| tt||Full complement roller with flat snap ring
Needle roller bearing
(Light series)
(Heavy series)
Roller with bolt shaft
Needle bearing
(Light series)
(Heavy series)
Full complement roller with bolt shaft
Needle roller bearing
(Light series)
(Heavy series)
Flat snap ring type double row full complement
Cylindrical roller roller
(Light series)
(Heavy series)
Bolt type double row full complement
Cylindrical roller roller shaft
Table 2 (Continued)
Type code
Specify the special dimensions for matching and installation
Use dimension series code and inner diameter code
Size number
Inner diameter code'
NATRdD
NATVdD
NUTRdD
Bearing code
NA2200
NATRdD||t t||Standard No.
GB/T6445.1
NUTRdDJB/T775+
Note: d--Bearing inner diameter: D--Bearing outer diameter: B-Bearing width: F--Non-inner diameter of needle roller bearing needle roller: D, Center sleeve outer diameter of thrust needle roller and cage assembly: d--Bolted shaft roller needle roller bearing bolt nominal diameter size directly expressed in millimeters, if it is a single digit, "0" should be added to the left. For example, 8mm is expressed as 08. bInner diameter code except d<10mm is expressed as "/actual millimeters", the rest should be in accordance with GB/T272-1993. With stamping center
°KR, KRV, NUKR type bearings with eccentric sleeves, E should be added after the type code, and the code becomes KRE, KRVE, NUKRE respectively. 3.2 Prefix and postfix codes
3.2.1 Prefix code
The meaning of the prefix code is shown in Table 3.
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