Some standard content:
Machinery Industry Standard of the People's Republic of China
JB/T53398-2000
Quality Grading of Rolling Bearing Products
(For internal use)
Published on April 24, 2000
State Machinery Industry Bureau
Implementation on October 1, 2000
JB/T53398—2000
This standard is a revision of JB/T53398-94 "Quality Grading of Rolling Bearing Products". Compared with JB/T53398-94, this standard has been revised as follows: 1. The quality classification of super-large rolling bearing products is included in this standard; 2. Appendix A of the original standard is included in the key inspection items of finished bearings in the main text of the standard; 3. The scope of application is clearly defined in accordance with the relevant provisions of GB/T12707-1991 "Guidelines for Quality Classification of Industrial Products"; 4. A chapter on symbols is added;
5. The technical requirements for quality classification and grade assessment are partially revised; 6. The quality levels of the main inspection items, vibration, and steel ball inspection items of finished bearings are adjusted. This standard replaces JB/T53398-94 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Standardization of Rolling Bearings. The drafting unit of this standard: Luoyang Bearing Research Institute. The main drafter of this standard: Wang Hui.
This standard was first issued in 1988 as JB/CQ105-88, and the standard number was adjusted to JB/T53398894 in September 1994.
1 Scope
Standards of the Machinery Industry of the People's Republic of China
Quality Grading of Rolling Bearing Products
(Internal Use)
JB/T53398-2000
Replaces JB/T53398-94
This standard specifies the technical and quality requirements for the quality grading and grade assessment of general-purpose rolling bearings, extra-large rolling bearings and their commodity parts. This standard is the basis for third-party inspection agencies authorized or recognized by law to determine the quality grade of enterprise products. This standard does not apply to commodity inspection (market spot check) and arbitration inspection of rolling bearings. 2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard was published, the versions shown were valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest version of the following standards. JB/T7047—1999
JB/T8571—1997
JB/T8922—1999
JB/T8923—1999
JB/T10187—2000
3 Symbols and abbreviations
Rolling bearings
Vibration (acceleration) technical conditions for deep groove ball bearings Rolling bearings
Test procedures for dust, grease leakage and temperature rise performance of sealed deep groove ball bearings Vibration (speed) technical conditions for cylindrical roller bearings Rolling bearings
Rolling Bearing
Rolling bearing
Ad: Single inner diameter deviation;
Steel ball vibration (acceleration) technical conditions
Deep groove ball bearing vibration (velocity) technical conditionsAd: Single plane average inner diameter deviation (for tapered bore bearings, it only refers to the theoretical small end of the inner hole);△dimp: The average inner diameter deviation of the basic tapered hole at the theoretical large end;Ad2mp: Single radial plane average inner diameter deviation of the bidirectional thrust bearing shaft ring:V2p: Single radial plane inner diameter variation of the bidirectional thrust bearing shaft ring;Vp: Inner diameter variation in a single radial plane;Vdm : Average inner diameter variation (only applicable to cylindrical holes): AD: Single outer diameter deviation:
ADm: Single radial plane average outer diameter deviation; ADi: Outer ring flange single outer diameter deviation;
Vps: Single radial plane outer diameter variation: VDmp: Average outer diameter variation;
AB: Inner ring single width deviation;
AB,: Bolt type roller needle bearing bolt length tolerance: VBs: Inner ring width variation:
AC: Outer ring single width deviation;
National Machinery Industry Bureau 2000-0 4-24 approved for implementation on 2000-10-01
ACis: Single width deviation of outer ring flange; Vc: Variation of outer ring width;
Ves: Variation of outer ring flange width:
K.: Radial runout of inner ring of complete bearing; K: Radial runout of outer ring of complete bearing;
S: Runout of inner ring reference end face to inner hole; JB/T53398—2000
Sp: Variation of inclination of outer diameter surface generatrix to reference end face: Sp: Variation of inclination of outer diameter surface generatrix to outer ring flange back face; S.: Complete The runout of the inner ring end face of the sleeve bearing to the raceway; S: The runout of the outer ring end face of the complete bearing to the raceway; Sol: The runout of the back of the flange of the complete bearing to the raceway; AT: The actual width deviation of the bearing;
gong: The nominal width of the bearing composed of the inner component of the tapered roller bearing and the standard outer ring or the height of the bidirectional thrust bearing: AT: The measured deviation of T:
T: The nominal width of the bearing composed of the outer ring of the tapered roller bearing and the standard inner component or the height of the external self-aligning thrust bearing without a self-aligning seat washer AT2s: The measured deviation of T:
T: The external self-aligning thrust bearing with a self-aligning seat washer Bearing height: AT3: measured deviation of T,
T: height of bidirectional external self-aligning thrust bearing without self-aligning seat washer: AT4s: measured deviation of T;
T: height of bidirectional external self-aligning thrust bearing with self-aligning seat washer; △Ts: measured deviation of T,
S: thickness variation of thrust bearing raceway to bottom surface S: thickness variation of thrust bearing shaft raceway to bottom surface; H: distance from the mounting plane of the vertical seat bearing to the center line of the spherical diameter; A,: distance from the mounting plane of the square, diamond and boss circular seat to the center line of the spherical diameter: D: boss diameter of circular seat bearing with boss and outer diameter of annular seat bearing; A: width of bearing seat (total width):
△d: single diameter deviation of roller and needle bearing bolt G: radial clearance:
G: axial clearance;
D: nominal diameter of rolling element;
D: single diameter of rolling element;
Dam: average diameter of rolling element;
VDws: variation of ball diameter;
Asph: spherical error;
VDwL: variation of batch diameter of rolling element;
S ：Gauge value:
420: Cone angle deviation
V2=L: Batch cone angle variation;
JB/T53398—2000
ALws: Roller (needle roller) single length deviation; VDwp: Roller (needle roller) single plane diameter variation: ADwm: Roller (needle roller) single plane average diameter deviation; ADws: Rolling element single diameter deviation:
Spw: Roller reference end face circular runout;
VwL: Roller batch length variation;
4cir: Roundness error.
4 Requirements for quality grading and grade assessment
4.1 Quality grading
Products within the scope of application of this standard are divided into three grades: qualified products, first-class products, and superior products based on their quality level and use value on the basis of meeting the current relevant standards. The quality level of superior products must reach the international advanced level, and the physical quality level must reach the advanced level in the past five years compared with similar foreign products. The quality level of first-class products must reach the general international level, and the physical quality level must reach the general level of similar international products. Qualified products are produced according to the general level standards of my country (national standards, industry standards, local standards or enterprise standards), and the physical quality level must meet the requirements of the corresponding standards. 4.2 Technical requirements
4.2.1 General requirements
a) Enterprises formulate their own enterprise standards, and their technical indicators are lower than the corresponding indicators of the current effective standards of the industry. Products are not eligible for the first-class and superior products:
b) All products whose product designs reach the international advanced level are eligible for the first-class and superior products:) The production process of graded products should have stable quality, and the assessment method shall be stipulated by the competent industry department. 4.2.2 Qualified products
The quality indicators of products meet the requirements of the relevant indicators in Table 1 to Table 12. The quality indicators of super-large rolling bearings meet the requirements of the relevant indicators in Table 13 to Table 15. Qualified products are determined by the enterprise’s inspection. 4.2.3First-class products
The quality indicators of products meet the requirements of relevant indicators in Table 1 to Table 12. The total number of defects in the main inspection items of various types of bearing finished product samples: the first-class products of 0-level and 6-level tolerance bearings should not exceed 3; the first-class products of 5-level, 4-level and 2-level tolerance bearings should not exceed 5. The quality indicators of extra-large rolling bearings meet the requirements of relevant indicators in Table 13 to Table 15. The confirmation of first-class products must be supported by the inspection certificate of the physical quality level issued by the national quality inspection center, the industry's full-time inspection agency or the inspection agency commissioned by the state and the industry. 4.2.4Superior products
The quality indicators of products meet the requirements of relevant indicators in Table 1 to Table 12. The total number of defects in the main inspection items of various types of bearing finished product samples: the superior products of 0-level and 6-level tolerance bearings should not exceed 2; the superior products of 5-level, 4-level and 2-level tolerance bearings should not exceed 3; the quality indicators of extra-large rolling bearings meet the requirements of relevant indicators in Table 13 to Table 15. The confirmation of superior products must be supported by an inspection certificate of the physical quality level issued by a national quality inspection center, a professional industry inspection agency, or an inspection agency commissioned by the state or industry. 3
5 Sealed deep groove ball bearings
JB/T53398—2000
Qualified products and products above qualified products must not only meet the various index requirements in Tables 1 to 6, but also undergo three performance tests of dust prevention, grease leakage and temperature rise in accordance with JB/T8571.
4.2.6 Extra-large rolling bearings
User evaluation of extra-large rolling bearings Product performance and service life: Qualified products should be able to meet the use requirements, first-class products should reach the international level in the early 1990s, and superior products should reach the international advanced level. 5 Inspection and judgment criteria
Product inspection shall comply with the current national standards, industry standards and relevant technical requirements. Table 1 Key inspection items and judgment sequence for finished bearings
Inspection items
Metallographic structure
Working surface roughness
Working surface burn
Missing parts
50(32)
50(32)
50(32)
Working surface appearance quality
50(32)
The actual quality does not conform to the stated standard (marking) 2) Note: The number of finished sets of outer spherical ball bearings with seats is indicated in brackets 1) No visible cracks are allowed during the appearance inspection and pickling inspection. 2) Products without certificates are unqualified products
50（32)
50（32)
50（32)
50（32)
Rolling elements
50（32)）
50（32)
50（32)
(Except for outer spherical ball bearings with seats)
Table 2 Main inspection items and judgment of finished bearings Product type and tolerance grade
All types
All types
Radial bearings
Radial bearings
Thrust bearings
Inspection items
Inner diameter deviation and variation (△dmp, Ade, △dunpdampVapVa2pVampdimp-dap
Deviation of the inner diameter of the radial roller (needle roller) bearing) Deviation and variation of the outer diameter (ADmpAD, ADsVp, Vomp, deviation of the circumscribed diameter of the radial roller (needle roller) bearing)
Radial runout of the inner ring (Kia)
Radial runout of the outer ring (Ke.)
Variation of the thickness of the washer raceway to the bottom surface (S, S)Superior products
First-class products
Qualified products
Product types and tolerance grades
Radial bearings (except angular contact ball bearings) Tapered roller bearings, angular contact ball bearings, thrust spherical roller bearings
Radial bearings with tolerances of 5, 4, and 2
4. Radial bearings with grade 2 tolerance
4. Radial bearings with grade 2 tolerancebZxz.net
Radial bearings with grade 2 tolerance
Radial needle roller and cage assembly
Bolt-type needle roller bearings
Bolt-type needle roller bearings
Rolling bearings
JB/T53398—2000
Table 2 (complete)
Inspection items
Radial clearance G (axial clearance G for four-point contact ball bearings)
Actual bearing width (height) deviation (AT△TeATATATAT)
Runout of inner ring end face to raceway (S)
Runout of outer ring end face (flange back) to raceway (S, Sea| |tt||Runout of the inner ring reference end face to the inner hole (S)Variation of the inclination of the outer diameter surface generatrix to the reference end face (flange back) (Sp, Sp)
The assembly should rotate flexibly, smoothly and without blockingBolt diameter tolerance (Ad.)
Bolt type roller and needle bearingBolt length tolerance (△B)Lower limit deviation of assembly chamfer
Superior products
Table 3 Main inspection items and judgment items for finished products of outer spherical ball bearings with seatsInspection items
Inner diameter deviation of bearings with seats
Limit deviation of the spherical center height H of vertical seat bearings and the spherical center height A of square, diamond and boss round seat bearings
Boss outer diameter D of boss round seat bearings and outer diameter D of annular seat bearings,and width A
Slot width A, slot bottom distance H and position tolerances of two slots for bearings with sliders Position tolerances of bolt hole axis for square, rhombus and boss round seat bearings Position tolerances of square holes for mounting on stamped rhombus and round seat bearings Form and position tolerances of mounting surfaces for bearings with seats
Table 4 Minor inspection items and judgment items for finished bearings Inspection items
Inner ring width deviation and variation (△B, VB) Outer ring width deviation and variation (AG, Ves, ACisVels) Tolerance of width B of radial needle roller and cage assembly Residual magnetic strength (except for outer spherical bearings with seats) Surface roughness of mating surfaces and end faces
Guaranteed clearance, rotational flexibility and noise between bearing parts (except for outer spherical bearings with seats) Table 4 (end) Inspection items Appearance quality (except for outer spherical bearings with seats) Rotational flexibility of outer spherical bearings with seats Residual magnetic strength of outer spherical bearings with seats Appearance quality of outer spherical bearings with seats Vibration level and judgment of deep groove ball bearings Product grade Superior products Qualified products JB/T53398-2000 Table 4 (end) Inspection items Appearance quality (except for outer spherical bearings with seats) Rotational flexibility of outer spherical bearings with seats Residual magnetic strength of outer spherical bearings with seats Appearance quality of outer spherical bearings with seats Vibration level and judgment of deep groove ball bearings Product grade Superior products Qualified products 1) Inspection should be based on JB/T7047 or JB/T10187 vibration value standard Standard\
Corresponding group 2
Corresponding group
Corresponding group
Superior product
Qualified product
2) Bearings with an inner diameter d of 60mm and vibration groups of Z3 (V3) and above can be evaluated as superior products; bearings with an inner diameter d>60mm and vibration groups of Z2 (V2) and above can be evaluated as superior products Table 6
Product grade
Superior product
First-class product
Qualified product
Vibration level of tapered roller bearings and consumable roller bearings and standards for determining vibration values 1)
Corresponding group
Corresponding group
Corresponding group
1) Vibration test of cylindrical roller bearings It should be based on JBT8922: The vibration test of tapered roller bearings should be based on the relevant standard table 7
Deep groove ball bearings
Angular contact ball bearings
Thrust ball bearings
Cylindrical roller bearings
Tapered roller bearings
Spherical roller bearings
Self-aligning ball bearings
Needle roller bearings
Bearing types
Test life and judgment of finished bearings
Lio/Lyo
Superior products
Qualified products
Note: Bearings with an inner diameter of ck10mm, bearings with an outer diameter of D>120mm, outer spherical ball bearings and bearings working under specific working conditions are rated according to their service life
.
Product name
All rolling elements
All rolling elements
All rolling elements
All rolling elements
JB/T53398—2000
3 Key inspection items and judgment of rolling elements
Inspection items
Superior products
Surface roughness
Metallographic structure
Crushing load test
1) Visual inspection and pickling inspection are not allowed to have visible cracks. Table 9
Inspection items
Surface quality
Ball diameter variation (Vpws)
Spherical error (Asph)
Batch diameter variation (VDwL)
Ball gauge value (S)
Steel ball inspection items and judgment
Superior products
Qualified products
Qualified products
Randomly select 20 steel balls for inspection, and the single ball vibration value and batch average vibration value shall comply with the provisions of JB/T8923
Z2 minus 3dB)
Nominal group
Randomly select 25 steel balls for inspection, and their VbwL shall comply with the requirements of relevant standards. Randomly select 25 steel balls for inspection, and their S shall comply with the requirements of relevant standards. 1) The physical quality of steel balls shall meet the requirements of this clause to be eligible for the evaluation of superior products: Groups above the health group shall be assessed by minus 3dB on the basis of the corresponding group: The highest group shall be assessed according to the explicit group.
2) The physical quality of the steel ball shall meet the requirements of this clause to be eligible for the first-class product evaluation; for groups Z2 and above, please refer to the corresponding group assessment table 10 Needle roller inspection items and judgment
Inspection items
Roundness error (4cir)
Length deviation (ALw)
Cylindrical surface protrusion
Working surface appearance quality
Non-working surface appearance quality
Needle roller single radial plane average diameter deviation (ADap) Needle roller batch diameter variation (Vp%L)
Superior products
First-class products
Qualified products
Randomly select 25 needle rollers for inspection, and their 4Damp shall meet the requirements of relevant standards. Randomly select 25 needle rollers for inspection, and their VDmL shall meet the requirements of relevant standards.7| |tt||Inspection items
Average diameter deviation (△Dump)
Diameter variation (Vom)
JB/T53398—2000
Inspection items and judgment of cylindrical rollers
Superior products
Average diameter difference at both ends (Damp-Dwmp)
Protrusion of cylindrical surface
Roundness error (4eir)
Roller reference end face runout (Spw)
Length deviation (ALw)
Appearance quality of working surface
Residual magnetic strength
Appearance quality of non-working surface
Batch diameter variation (VDL)
Batch length variation (Vwl)
Qualified products
Random sampling 25 rollers are inspected, and their VpwL should meet the requirements of relevant standards. 25 rollers are randomly selected for inspection, and their Viwl should meet the requirements of relevant standards. Inspection items and judgment of tapered rollers
Inspection items
Diameter variation (Vpm)
Roundness error (4r)
Roller reference end face circular runout (Spw)
Cone angle deviation (42*)
Length deviation (4Lws)
Generator protrusion and spherical end face shape
Appearance quality of working surface
Appearance quality of non-working surface
Residual magnetic strength
Batch diameter variation (Vp)
Batch cone angle variation (Vel)
Inspection items
Diameter variation (Vpxp)| |tt||Roundness error (Aeir)
Roller reference end face circular runout (Sp%)
Superior products
First-class products
Qualified products
Randomly select 25 rollers for inspection, and their VpmL shall comply with the requirements of relevant standards. Randomly select 25 rollers for inspection, and their VpmL shall comply with the requirements of relevant standards. Table 13
Spherical roller inspection items and judgment
Superior products
Qualified products
Inspection items
Roller rolling surface and spherical end face shape
Appearance quality of working surface
Appearance quality of non-working surface
Residual magnetic intensity
Batch diameter variation (VDuL)
JB/T53398-2000
Table 13(Finish)
Superior products
Qualified products
Randomly select 25 rollers for inspection, and their VpmL should meet the requirements of relevant standards. Table 14 Key items and judgment of each grade of super-large rolling bearing parts
Inspection items
Metallographic structure
Working surface roughness
Working surface burn
Crack!
Missing parts
The actual quality does not conform to the explicit standard (mark) 2) 1) Visual inspection and pickling inspection are not allowed to have visually visible cracks, 2) Products without certificates are unqualified products,
Rolling element
Table 15 Main inspection items and judgment of super-large rolling bearing parts Product type and tolerance grade
All types
All types
Radial bearing
Radial bearing
Thrust Bearings
Radial bearings
Tapered roller bearings, thrust
Spherical roller bearings
Thrust angular contact ball bearings
Thrust spherical roller bearings
All types
Inspection items
Inner diameter deviation and variation (Adap, Vap, Vamp, Adn-Adapdamn, Vin
Outer diameter deviation and variation (ADanVomVomp) Outer ring raceway to outer surface Thickness variation (K) Thickness variation of inner ring raceway to inner hole (K) Thickness variation of washer raceway to bottom surface (S, S) Radial clearance (G)
Actual bearing height (width) deviation (△T) Shaft washer groove oblique circular runout (ND, seat washer groove oblique circular runout (N) Shaft washer raceway oblique circular runout (N), Shaft washer large rib inner surface oblique circular runout (N), Seat washer raceway oblique circular runout (N) Lower deviation of assembly chamfer limit
Superior product
Qualified product
JB/T53398—2000
Super large rolling bearingsMinor inspection items and judgment inspection items for bearing parts
Inner ring width deviation and variation (AB, VBsOuter ring width deviation and variation (4G, Ve)Surface roughness of mating surface and end surface
Guaranteed clearance between bearing parts
Rotation flexibility
Appearance quality
Residual magnetic strength
Superior products
Qualified products
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.