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GB/T 12764-2019 English PDF

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GB/T 12764-2019: Rolling bearings - Needle roller bearings with drawn cup and without inner ring - Boundary dimensions, geometrical product specifications (GPS) and tolerance values
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GB/T 12764: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 12764-2019English264 Add to Cart 3 days [Need to translate] Rolling bearings - Needle roller bearings with drawn cup and without inner ring - Boundary dimensions, geometrical product specifications (GPS) and tolerance values Valid GB/T 12764-2019
GB/T 12764-2009English359 Add to Cart 3 days [Need to translate] Rolling bearings -- Needle roller bearings, drawn cup without inner ring -- Boundary dimensions and tolerances Obsolete GB/T 12764-2009
GB/T 12764-1991English239 Add to Cart 2 days [Need to translate] Rolling bearings--Needle roller bearings, drawn cup, without inner ring--Boundary dimension plan Obsolete GB/T 12764-1991

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Basic data

Standard ID GB/T 12764-2019 (GB/T12764-2019)
Description (Translated English) Rolling bearings - Needle roller bearings with drawn cup and without inner ring - Boundary dimensions, geometrical product specifications (GPS) and tolerance values
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard J11
Classification of International Standard 21.100.20
Word Count Estimation 14,183
Date of Issue 2019-10-18
Date of Implementation 2020-05-01
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 12764-2019: Rolling bearings - Needle roller bearings with drawn cup and without inner ring - Boundary dimensions, geometrical product specifications (GPS) and tolerance values


---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Rolling bearings--Needle roller bearings with drawn cup and without inner ring--Boundary dimensions, geometrical product specifications (GPS) and tolerance values ICS 21.100.20 J11 National Standards of People's Republic of China Replaces GB/T 12764-2009 Rolling bearings needle roller bearings without inner ring and drawn outer ring Dimensions, product geometric technical specifications (GPS), and Tolerance value Boundarydimensions, geometrical productspecifications (GPS) and tolerance values (ISO 3245..2015, IDT) Published on October 18,.2019 2020-05-01 implementation State Administration of Market Supervision Published by China National Standardization Administration

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 12764-2009 "Dimensions and tolerances of needle roller bearings without inner rings and drawn outer rings for rolling bearings", and Compared with GB/T 12764-2009, the main technical changes are as follows. --- Added the term "constraint diameter" (see Chapter 3); --- Applied product geometric technical specifications, revised some symbols and their meanings, and revised drawing annotations (see Chapter 4,.2009 Edition) (Chapter 4, figure 1); --- Added description of the upper and lower limits of C1s, C2s, rs (see 6.3.2, 6.3.3); --- Removed the measurement method of the minimum single inner diameter of the needle overall (see Chapter 7 of the.2009 edition). This standard uses the translation method equivalent to ISO 3245..2015 "Rolling bearings needle roller bearings without inner ring drawn outer ring dimensions, production Geometrical Technical Specifications (GPS) and Tolerances. The Chinese documents that have a consistent correspondence with the international documents referenced normatively in this standard are as follows. --- GB/T 4199-2003 Tolerance definition of rolling bearings (ISO 1132-1..2000, MOD) --- GB/T 6930-2002 Vocabulary for rolling bearings (ISO 5593..1997, IDT) --- GB/T 7811-2015 Rolling bearing parameter symbols (ISO 15241..2012, IDT) --- GB/T 16892-1997 Notation of non-rigid parts of shape and position tolerance (eqvISO 10579..1993) This standard is proposed by China Machinery Industry Federation. This standard is under the jurisdiction of the National Rolling Bearing Standardization Technical Committee (SAC/TC98). This standard was drafted. Luoyang Bearing Research Institute Co., Ltd., Suzhou Bearing Factory Co., Ltd., Schaeffler (China) Co., Ltd., Jiangxi Sunan Bearing Co., Ltd., Cixing Group Co., Ltd., Zhejiang Dewo Bearing Co., Ltd., Suzhou Dongwu Needle Bearing Co., Ltd. The main drafters of this standard. Zhang Bowen, Zhou Caihong, Li Yanwen, Jiang Yongwei, Gao Shaojia, Jiang Yantianyu, Gu Xiaonan, Wang Huijuan, Wang Yuliang. The previous versions of the standards replaced by this standard are. --- GB/T 12764-1991, GB/T 12764-2009.

Introduction

This standard is the geometric elements of mechanical parts specified in the product geometric technical specification (GPS) system (see ISO 14638 [9] matrix model). standard. Unless otherwise specified, the basic principles of ISO /GPS given in ISO 8015 [6] are applicable to this standard, and given in ISO 14253-1 [7] The default principles apply to technical specifications based on this standard. The relationship between functional requirements and measurement methods and measurement uncertainty is recommended to be considered. The traditional measurement methods are in ISO 1132-2 [4]. A description is given, and measurement uncertainty is recommended to focus on ISO 14253-2 [8]. Rolling bearings needle roller bearings without inner ring and drawn outer ring Dimensions, product geometric technical specifications (GPS), and Tolerance value

1 Scope

This standard specifies the outer dimensions, preferred dimensions, and minimum chamfer dimensions of needle roller bearings without drawn inner ring. Sealing type is also specified Thickness of the closed end of drawn cup needle roller bearings. In addition, this standard also specifies the overall inner diameter tolerance of the needle roller and the tolerance of the outer ring width of the stamping. See Appendix A for tolerances of shaft raceways and housing bores.

2 Normative references

The following documents are essential for the application of this document. For dated references, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. ISO 1132-1 Rolling Bearing Tolerances Part 1. Terms and Definitions (Rolingbearings-Tolerances-Part 1. Termsanddefinitions) ISO 5593 rolling bearing vocabulary (Rolingbearings-Vocabulary) ISO 10579 Geometrical Product Specification (GPS) Dimensions and Tolerances for Non-Rigid Parts [Geometricalproductspecifica- tions (GPS) -Dimensioningandtolerancing-Non-rigidparts] ISO 14405-1 Geometrical Product Specifications (GPS) Dimensional Tolerances Part 1. Linear Dimensions [Geometricalproduct specifications (GPS) -Dimensionaltolerancing-Part 1. Linearsizes] ISO 15241 rolling bearing parameter symbols (Rolingbearings-Symbolsforphysicalquantities) ISO /T S17863 Product Geometric Technical Specification (GPS) Geometric Tolerance of Moving Components [Geometricalproductspecifica- tion (GPS) -Geometricaltolerancingofmoveableassemblies]

3 terms and definitions

The terms and definitions defined in ISO 1132-1, ISO 5593, and ISO 14405-1, as well as the following terms, apply to this document. 3.1 Constraint diameter D1c The diameter of the element under constraints when evaluating the ΔFws characteristic. Note. The restraint diameter is the same as the ring gauge diameter in ISO 1132-2 [4].

4 symbols

The symbols given in ISO 15241 and the following apply to this document. The explanation of the symbols is consistent with the GPS terminology. The technical specifications of the dimensions are explained in Table 1 and Figure 1. Figure 1 gives an example of the dimensions of needle roller bearings. See Table 1 for the meaning of the symbols used in the figure. The tolerance value related to the characteristic is expressed by t plus the characteristic symbol, such as. tΔCs. The default ISO size specification operation set in this standard is consistent with ISO 14405-1, that is, the two-point size is valid. Table 1 Nominal size symbols, characteristic symbols and specification modifiers Nominal size and Distance symbol a Attribute Symbol Specification Modifier b Description C Nominal width of stamped outer ring ΔCs The smallest outer dimension of the outer ring width and the nominal size deviation C1 Nominal thickness of stamped outer ring end C1s Single thickness of stamped outer ring end (Minimum external size) C2 Nominal thickness of flat bottom stamped outer ring C2s Flat bottom stamped outer ring end single thickness (Minimum external size) D Nominal outer diameter of stamped outer ring Fw Roller needle overall nominal inner diameter ΔFwsc Minimum internal diameter d of the maximum internal diameter of the needle Deviation in size r Nominal chamfering e dimension rs single chamfer size a Except for the format, follow the symbols defined in ISO 15241. b According to the symbols defined in ISO 14405-1. c Constraints and specification modifiers for fixed and movable parts are in accordance with ISO /T S17863, see Figure 1. The minimum value of d takes into account the effect of the overall rotation of the needle roller. e The chamfers in this standard are rounded. a) Open bearings b) Sealed bearings = Effective under the condition that ① is pressed into the ring gauge with the inner diameter of D1c. See Table 4 and Table 5 for the value of D1c = FP①-MP② = Needle should be in contact with drawn raceway = Coaxial when rotating Explanation. ① --- Punched outer ring; ② --- The overall needle roller. Figure 1 Structure example of drawn needle roller bearing without inner ring

5 Dimensions

Nominal dimensions of sealed and open type needle roller bearings without drawn ring and inner ring 2D is as specified in Table 3. Table 2 Dimensions of Sealed and Open Type Needle Roller Bearings without Inner Ring Stamping and Outer Ring --- Diameter Series 1D Unit is mm Fw D Size series 21D 31D 41D 51D 61D 71D 81D 91D C1a C2a rb 4 8 7 8 9-----1.9 1 0.3 5 9 7 8 9-----1.9 1 0.4 6 10 7 8 9 10----1.9 1 0.4 7 11 7 8 9 10 12---1.9 1 0.4 8 12 7 8 9 10 12---1.9 1 0.4 9 13 7 8 9 10 12 14--1.9 1 0.4 10 14 7 8 9 10 12 14--1.9 1 0.4 12 16 7 8 9 10 12 14--1.9 1 0.4 14 20 10 12 14 16 18 20--2.8 1.3 0.4 15 21 10 12 14 16 18 20--2.8 1.3 0.4 16 22 10 12 14 16 18 20--2.8 1.3 0.4 17 23 10 12 14 16 18 20--2.8 1.3 0.4 18 24 10 12 14 16 18 20--2.8 1.3 0.4 20 26 10 12 14 16 18 20--2.8 1.3 0.4 22 28 10 12 14 16 18 20--2.8 1.3 0.4 25 32 12 14 16 18 20 24 28 32 2.8 1.3 0.8 28 35 12 14 16 18 20 24 28 32 2.8 1.3 0.8 30 37 12 14 16 18 20 24 28 32 2.8 1.3 0.8 32 39 12 14 16 18 20 24 28 32 2.8 1.3 0.8 35 42 12 14 16 18 20 24 28 32 2.8 1.3 0.8 38 45 12 14 16 18 20 24 28 32 2.8 1.3 0.8 40 47 12 14 16 18 20 24 28 32 2.8 1.3 0.8 42 49 12 14 16 18 20 24 28 32 2.8 1.3 0.8 45 52 12 14 16 18 20 24 28 32 2.8 1.3 0.8 50 58 14 16 18 20 24 28 32 36 2.8 1.6 0.8 55 63 14 16 18 20 24 28 32 36 2.8 1.6 0.8 60 68 14 16 18 20 24 28 32 36 2.8 1.6 0.8 65 73 14 16 18 20 24 28 32 36 2.8 1.6 0.8 70 78 14 16 18 20 24 28 32 36 2.8 1.6 0.8 Note. The value below the horizontal line is the preferred size. aC1 and C2 are the upper limits of C1s and C2s, respectively. b The chamfer dimension r is the lower limit of rs. Table 3 Dimensions of Open Type and Sealed Type Needle Roller Bearings without Inner Ring Stamping and Outer Ring --- Diameter Series 2D Unit is mm Fw D Size series 22D 32D 42D 52D 62D 72D 82D C1a C2a rb 8 14 10 12 14----2.8 1.3 0.4 9 15 10 12 14 16---2.8 1.3 0.4 10 16 10 12 14 16---2.8 1.3 0.4 12 18 10 12 14 16 18--2.8 1.3 0.4 14 22 12 14 16 18 20 24-2.8 1.3 0.4 15 23 12 14 16 18 20 24-2.8 1.3 0.4 16 24 12 14 16 18 20 24-2.8 1.3 0.8 17 25 12 14 16 18 20 24-2.8 1.3 0.8 18 26 12 14 16 18 20 24-2.8 1.3 0.8 20 28 12 14 16 18 20 24-2.8 1.3 0.8 22 30 12 14 16 18 20 24-2.8 1.3 0.8 25 35 14 16 18 20 24 28 32 3.4 1.6 0.8 28 38 14 16 18 20 24 28 32 3.4 1.6 0.8 30 40 14 16 18 20 24 28 32 3.4 1.6 0.8 32 42 14 16 18 20 24 28 32 3.4 1.6 0.8 35 45 14 16 18 20 24 28 32 3.4 1.6 0.8 38 48 14 16 18 20 24 28 32 3.4 1.6 0.8 40 50 14 16 18 20 24 28 32 3.4 1.6 0.8 42 52 14 16 18 20 24 28 32 3.4 1.6 0.8 45 55 14 16 18 20 24 28 32 3.4 1.6 0.8 aC1 and C2 are the upper limits of C1s and C2s, respectively. b The chamfer dimension r is the lower limit of rs.

6 Tolerance

6.1 General In Tables 4 to 6, the symbols U and L are specified as follows. U --- upper limit deviation; L --- lower limit deviation. 6.2 Inner diameter tolerance According to the definition in ISO 10579, needle roller bearings with drawn outer rings are non-rigid parts. Press into a ring gauge. The free state conditions specified in ISO 10579 are valid for tolerances of dimensions C, C1, C2 and r. The tolerance tΔFws of ΔFws is shown in Tables 4 and 5. Table 4 Tolerance of ΔFws --- diameter series 1D unit is mm Fw Da Constraint diameter b D1c tΔFws UL 7.984 8.984 9.984 0.028 0.01 10.98 11.98 12.98 13.98 0.031 0.013 15.98 19.976 20.976 21.976 22.976 23.976 0.034 0.016 25.976 27.976 31.972 34.972 36.972 0.041 0.02 38.972 41.972 44.972 46.972 48.972 51.967 57.967 0.05 0.025 62.967 67.967 72.967 77.967 0.06 0.03 a The deviation of the outer diameter D of the drawn outer ring is not specified. The bearing manufacturer should ensure that the functional requirements are met. b If the actual constraint diameter deviates from its specified value, tΔFws should be corrected to compensate for this deviation. Table 5 Tolerance of ΔFws --- diameter series 2D unit is mm Fw Da Constraint diameter b D1c tΔFws UL 13.98 14.98 15.98 0.031 0.013 Table 5 (continued) Units are mm Fw Da Constraint diameter b D1c tΔFws UL 17.98 21.976 22.976 23.976 24.976 25.976 0.034 0.016 27.976 29.976 34.972 37.972 39.972 0.041 0.02 41.972 44.972 47.972 49.972 51.967 54.967 0.05 0.025 a The deviation of the outer diameter D of the drawn outer ring is not specified. The bearing manufacturer should ensure that the functional requirements are met. b If the actual constraint diameter deviates from its specified value, tΔFws should be corrected to compensate for this deviation. 6.3 Tolerance of stamped outer ring 6.3.1 Stamped outer ring width, C See Table 6 for tolerances on the width C of the drawn outer ring. Table 6 Tolerance of stamped outer ring width in mm tΔCs UL All widths 0 -0.3 6.3.2 End thickness C1 and C2 of stamped outer ring C1 and C2 are the upper limits of C1s and C2s, respectively (see Tables 2 and 3). The values of C1 and C2 are specified to avoid contact between the shaft end face and the inner end face of the drawn outer ring during use. The lower limit values for C1s and C2s are not specified. GPS labels are shown in Figure 1b). 6.3.3 Chamfer size, r The chamfer size r is the lower limit of rs (see Tables 2 and 3). The upper limit of the chamfer size is not specified.

Appendix A

(Informative appendix) Shaft raceway and housing bore tolerances A.1 General Whether the drawn cup needle roller bearings can work properly depends on the quality of the shaft provided by the user and the bearing housing with the appropriate quality. turn off. The bearing housing should have sufficient strength to correct the roundness and size of the bearing. Recommended tolerances and tolerance values for shaft raceways and housing bores are given in this appendix. The values in the figure are for reference only. These values may not be applicable under certain operating conditions and characteristics. If in doubt, ask the bearing system Manufacturers consult specific recommendations. A.2 Raceway hardness and hardened layer depth Shaft raceways are hardened and ground. The minimum surface hardness is 670HV (58HRC). The minimum hardened layer depth of the raceway is 0.3mm ~ 0.8mm, the minimum depth of the hardened layer depends on the bearing size, rolling body diameter, heat treatment process and load conditions of the shaft. If in doubt, ask Bearing manufacturers consult specific recommendations. Note. The definition of the depth of the hardened layer is in accordance with ISO 2639..2002 [5], 3.1. A.3 Symbols The following symbols apply to this appendix. D1. Nominal diameter of bearing housing hole d1. nominal shaft diameter A.4 Shaft raceway and bearing housing hole structure Figure A.1 shows the recommended tolerances for shaft raceways and housing bores. Tolerances apply to fixed bearing housings and rotating shafts. If the bearing housing rotates, consult the bearing manufacturer for specific recommendations. Figure A.1 The value of the standard tolerance class (IT3 and IT5) related to the nominal diameter and the limit deviation of the tolerance class (h6 or N6) are in accordance with ISO 286-1 [1]. Regulations. Explanation. 1 --- the nominal diameter of the shaft d1 (= Fw); 2 --- Nominal diameter D1 (= D) of bearing housing hole; 3--Tolerance grade for steel or cast iron housings is N6, and tolerance grades for light metal housings are R6 (see Note 2); 4--cylindricity according to ISO 1101 [3]; 5 --- or Rzmax1; 6 --- or Rzmax4. Note 1. The recommended value of the bearing seat is applicable to the surface to be assembled with the bearing. The technical requirements of the shaft raceway apply to the functional part of the shaft surface. Note 2. Specific recommendations for housing construction of other materials can be obtained from the bearing manufacturer. Figure A.1 Shaft and housing structure references [1] ISO 286-1 Geometrical product specifications (GPS) -ISO code systemfortoleranceson linearsizes-Part 1. Basisoftolerances, deviations and fits [2] ISO 286-2 Geometrical productspecifications (GPS) -ISO codesystemfortoleranceson linearsizes-Part 2. Tables ofstandardtoleranceclassesandlimitdeviationsforholesandshafts [3] ISO 1101 Geometrical productspecifications (GPS)-Geometricaltolerancing- Toler- ancesofform, orientation, locationand run-out [4] ISO 1132-2 Rolingbearings-Tolerances-Part 2. Measuringandgaugingprinciples andmethods [5] ISO 2639..2002 Steels-Determinationandverificationofthedepthofcarburizedand hardenedcases [6] ISO 8015 Geometrical productspecifications (GPS) -Fundamentals-Concepts, princi- plesandrules [7] ISO 14253-1 Geometrical productspecifications (GPS) -Inspectionbymeasurementof workpiecesandmeasuringequipment-Part 1. Decisionrulesforprovingconformityornonconformity withspecifications [8] ISO 14253-2 Geometrical product specifications (GPS) -Inspectionbymeasurementof workpiecesandmeasuringequipment-Part 2. GuidancefortheestimationofuncertaintyinGPS measurement, incalibrationofmeasuringequipmentandinproductverification [9] ISO 14638 Geometrical product specification (GPS)-Matrixmodel

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