This standard specifies the structural type, code method, dimensions and technical requirements of cross-axis universal joint cylindrical roller bearings for steel rolling machinery, lifting and transportation machinery and other heavy machinery. This standard applies to universal joint cylindrical roller bearings. JB/T 3370-2002 Rolling bearings Universal joint cylindrical roller bearings JB/T3370-2002 standard download decompression password: www.bzxz.net
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ICN21.100.20 Mechanical Industry Standard of the People's Republic of China JB/T3370——2002 Replaces JB/T3370—1991 Rolling bearings-cylindrical roller bearings for universal Joints2002-07-16Published Implementation on 2002-12-01 Published by the State Economic and Trade Commission of the People's Republic of ChinaForeword Normative referencesFemale parts 3 Symbols. 4 Code method, Prefix code English code Suffix code 4.4 Code example S Overall dimensions 6 Installation requirements 6.! Material change heat treatment quality plate 6.2 Specification 6.3 Other technical requirements Testing method and inspection plan 8 Mark Appendix A (Normative Appendix) Comparison of old and new codes of universal joint cylindrical roller bearings. JB/T3370-2002 JB/T3370-2002 The revised version of the standard JB/T3370-1991 & Rolling bearing universal piece without inner ring return column rust on bearing dimensions and tolerances? Compared with B/T3370-1, the main changes are as follows: According to GB1.1-2000, the writing format is modified: the name is collected as rolling bearing universal joint return column magnetic sub bearing? :Change the universal joint cylindrical roller bearing code (both the 1991 edition and this edition are 4 years old): Added "Technical requirements", "Testing methods and inspection rules", "Marking" and "Packaging" (see Article 6, Chapter 8 and Chapter 9 1: Added the informative appendix "Universal joint cylindrical roller bearing new and old code comparison" see Appendix A): Appendix A of this standard is an informative appendix. This standard is proposed by China Machinery Industry Federation. This standard is developed by the National Technical Committee for Standardization of Bearings (CSBTS/TC9B). The unit of this standard: Luoyang Bearing Group Co., Ltd. The main innovators of this standard: Zong Jianli, Zhao Zhiling The revised versions of the standards replaced by this standard are as follows: JB33701983.B/T33701991 1 Scope Rolling bearings Universal joints Cylindrical roller bearings JB/T 3370-2002 This standard specifies the structural type, numbering method, overall dimensions and requirements for cross-jointed universal joint roller bearings for heavy-duty conveyors and other types of machinery. This standard is used for square pitch rails (hereinafter referred to as shaft bearings). 2 Normative referenced documents The following documents have become the series of this standard through the application of this standard. For any referenced document with a date indicated, all subsequent amendments (unlike the contents of the revision) or revised versions are not applicable to this standard. However, parties that have reached an agreement based on this standard are encouraged to use the original versions of these documents. For any referenced document without a date indicated, its latest version is applicable to this standard. GB/T 307.2—1995 GB/T 1801---1999 GR/T4661-:2002 GB/T 7811—1999 GB/T 8597—1988 M/T 122I JB/T3574—1557 JB.T 7051—1993 JR/T 8921 3 Special Principles and methods for measuring and inspecting rolling bearings (ney1SO/TR9274:1991) Selection of limits and matching tolerance zones (eIS01829:1975) Rolling bearings Rolling bearing symbols Deep dynamic bearing packaging (negJISB1517) High combustion chromium steel dynamic bearing parts heat treatment technical conditions Rolling bearing product logo Surface roughness measurement of dynamic bearing parts Li Li evaluation method for dynamic bearings and parts, inspection rules GB/T7611-1999 The symbols given in E and the following symbols apply to this standard (see Figures 1 and 2) 5×45 w: Overall inner diameter of roller A: The difference between the overall inner diameter of roller JB/T3370-20Q2 T-axis width H: The width from the inner side of the convex step to the inner bottom H. : Bearing bottom thickness M: Oil filling hole screw diameter S: Inner boss width 4 Code method Unique code consists of a prefix code, a basic code and a suffix code. 4.1 Prefix code The code before ZW indicates a cylindrical bearing. 4.2 Base code The code before "" indicates the total inner diameter of the roller according to the regular rounding of the numbers! The number after " represents the width of the bearing (rounded according to the numerical rule). 4.3 Post-code The post-code RS indicates that the sealing form of the bearing is a rubber seal ring: when a steel groove seal is used, it is not indicated in the code. 4.4 Code example 5 Overall dimensions Rubber ring The bearing width is 47mm (after rounding) The overall inner diameter of the bearing is 32mm (after rounding) One-way section column bearing The overall dimensions of the bearing are in accordance with the provisions of Table 1. For comparison of new and old bearing codes, see Appendix A6 Technical requirements 6.1 Material and heat treatment quality When the shaft and bearing are made of 15 steel, their hardness and heat treatment quality are BT1255-2001 stipulates: When using other materials, the frequency and thermal properties shall be in accordance with the provisions of the product drawings. 6.2 Tolerance See Table 1 for overall dimensions. Unit: mam Bearing model 232/47 Zw36/53 ZW4a/59 Zw46/65 ZW52T3 ZW--·RS type ZW32/47RS ZW36/53RS Zao59Rs ZW46/65RS ZW52/73RS ZW60/S:RS Overall dimensions ZW type ZW.--RS type M10×1 Bearing model 2.w-ks type ZW70/89 ZW76/96 ZW87/103 ZW100111 2W11(V113 2W127/127 ZW158/170 2W189/195 ZW70898.5 ZW76/96R5 ZW83/103RS ZWBT/103RS ZWJOIERS ZW11Gr11 3RS ZW127,127RS ZW758/170RS ZW:89195RS The bearing size is small, and the overall inner diameter deviation of the roller shall be determined after the temporary bearing test according to the provisions of Table 2. 6.2.1 Overall inner diameter of the roller Upper tolerance Outer diameter deviation shall be in accordance with the provisions of Table 3. Outer diameter Upper tolerance Lower tolerance Table 1 (continued) Overall dimensions ZW type z..-RS villa Users should also contact the bearing design department when necessary. Table 2 6.2.3 The width deviation from the inner side of the flange to the inner bottom shall be in accordance with the provisions of Table 4. 4 Other technical requirements The lower run difference The surface roughness value R. of the bearing mating surface and the outer bottom surface is 1.25um. 6.3.1 1 The tolerance of the shaft journal and the inner grid of the neutron body shall be in accordance with GB/T1RO16.3.2 The closing tolerance shall be in accordance with N6 in BT1801-1999. 80 JB/T3370-2002 M70×1 :MI0X1 Unit: +m Unit: wm Unit: 1999 h5, the housing hole and the bearing outer diameter 6.3.3 The technical requirements for cylindrical rollers shall comply with the provisions of Class III rollers in GB/T4661-2002. 6.3.4 The thickness of the amide pad installed at the bottom of the chain bearing ring shall be selected by the user according to the installation size of the auxiliary bearing and the length of the cross shaft when adjusting the shaft spacing. 6.3.5 The shaft shall rotate flexibly, and the seal and retaining ring shall not be loose or off the road. 3 JB/T3370-2002 6.3.6 The surface of the bearing shall not have cracks, edges and burrs, etc. 7 Measurement methods and inspection rules 7.1 The tolerance of the overall inner diameter of the roller shall be checked by a gauge or instrument. 7.2 The measurement of external tolerances shall be in accordance with the provisions of 0R/307.2-1995. 7.3 The measurement of the width tolerance from the inner side of the convex dial to the inner bottom shall be in accordance with the provisions of the manufacturer. 7.4 The roughness of the table shall be in accordance with the provisions of BT70511993. 7.5 The inspection and control regulations of bearings shall be in accordance with the provisions of JB8921.-1999. The sample shall be inspected according to the level I, the AQL value of the seven items is 1.5, the frequency is 4.0, and the detailed inspection items shall be in accordance with the provisions of Table 5. 5 B mark Main inspection layer The overall inner diameter deviation is produced Outer diameter deviation D |Side internal nitrogen explosion vegetables Assembly example The bearing shall be in accordance with the provisions of B/T3.574-1997, and the packaging The installation of the bearing shall be in accordance with the provisions of GBT8597-1988: 1 Inspection items Bearing specification category Match table with low to high surface roughness Appearance quality Book filtration, packaging liquid Appendix A (Normative appendix) Comparison of old and new codes of universal joint cylindrical roller bearings and new codes of universal joint cylindrical roller bearings are shown in Table 4.1. Table A.1 Comparison of old and new codes of universal joint cylindrical bearings ZW32/17 ZW36453 zwdriris zWS273 Zw60/B ZW70/89 ZW76/96 ZW83:03 ZW87/L03 zW:0G/111 2W1 277:27 W158/170 ZW189/145 Deduction code Type 604000 604906 G0490 7 804908 504909 834912 6r4914 604915 604916 60 4917 604920 604922 604925 604932 604938 Date number 2 W·RS type ZW32/478S ZW36/53RS ZW4DV59RS ZW4665RS 2W5273RS||t t||ZW6VSIRS ZW7W80RS Zw6/96ks ZW83/103RS ZAOERS ZW10OI1 IRS ZW110/113RS ZW127/127RS ZW158/170RS ZW1S9/195RS JB/T 3370—2002 604000R.S type 604906R5 604907R5 604908RSWww.bzxZ.net 604910RS 604912RS 6 0-4014R5 04U15RS S4Y16RS 34917RS G04920RS 604922RS 0-4925RS 604932R5 604938R5Type S 604906R5 604907R5 604908RS 604909RS 604910RS 604912RS 60-4014R5||tt ||04U15RS S4Y16RS 34917RS G04920RS 604922RS 0-4925RS 604932R5 604938R5Type S 604906R5 604907R5 604908RS 604909RS 604910RS 604912RS 60-4014R5||tt ||04U15RS S4Y16RS 34917RS G04920RS 604922RS 0-4925RS 604932R5 604938R5 Tip: This standard content only shows part of the intercepted content of the complete standard. 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