GB/T 19935-2025 English PDFUS$199.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 19935-2025: Name plates, centre distances, information to be supplied to gear manufacturer by the purchaser for worm gear units Status: Valid GB/T 19935: Historical versions
Basic dataStandard ID: GB/T 19935-2025 (GB/T19935-2025)Description (Translated English): Name plates, centre distances, information to be supplied to gear manufacturer by the purchaser for worm gear units Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: J17 Classification of International Standard: 21.200 Word Count Estimation: 9,965 Date of Issue: 2025-05-30 Date of Implementation: 2025-12-01 Older Standard (superseded by this standard): GB/T 19935-2005 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 19935-2025: Name plates, centre distances, information to be supplied to gear manufacturer by the purchaser for worm gear units---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. ICS 21.200 CCSJ17 National Standard of the People's Republic of China Replace GB/T 19935-2005 Worm gear nameplate, center distance, Parameters provided by the user to the manufacturer Released on 2025-05-30 2025-12-01 Implementation State Administration for Market Regulation The National Standardization Administration issued Table of contentsPreface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Nameplate 1 5 Center distance 1 6 Parameters provided by the user to the manufacturer 2 6.1 General 2 6.2 Transmission 2 6.3 Worm gear tooth profile 3 6.4 Others 3 References 5ForewordThis document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document replaces GB/T 19935-2005 "Geometric parameters of worm gears - Nameplate, center distance, user-supplied Compared with GB/T 19935-2005, in addition to structural adjustments and editorial changes, the main technical changes are as follows. a) The scope of application has been changed, and the maximum center distance has been changed from "500mm" to "1000mm" (see Chapter 1, Chapter 1 of the.2005 edition); b) Added a chapter on “Terms and Definitions” (see Chapter 3); c) Added some center distance parameters (see Table 1); d) The information given on the nameplate has been changed (see Chapter 4, Chapter 2 of the.2005 edition); e) The requirements for variable load calculation have been changed (see Figure 1, Figure 1 of the.2005 edition); f) The requirement that users should indicate all machined bearing dimensions has been deleted (see 4.2.2 of the.2005 edition); g) The marking of some dimensions in the overall dimensions has been deleted (see Figure 2 of the.2005 edition). Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document is proposed and coordinated by the National Technical Committee for Gear Standardization (SAC/TC52). This document was drafted by. Zhengzhou Institute of Mechanical and Electrical Engineering Transmission Technology Co., Ltd., Hangzhou Jiepai Transmission Technology Co., Ltd., Chongqing University, Zhejiang University Ma Transmission Co., Ltd., Zhejiang Sankai Electromechanical Co., Ltd., China Machinery Engineering Institute Group Zhengzhou Machinery Research Institute Co., Ltd., Zhongyuan University of Technology, Liaoning Jinhua Transmission Machinery Manufacturing Co., Ltd., Northeastern University, China Agricultural University, Zhengzhou Desen Environmental Technology Co., Ltd. The main drafters of this document are. Wang Zhigang, Chen Demu, Wang Shilong, Cao Zhigang, Zheng Yu, Jiang Jianbin, Fan Ruili, Li Haixia, Li Youhua, Wang Xu, Zhao Yaping, Li Haitao, Lu Jianjiang, Chen Yonghong, Guo Qingqing, Xiao Yuliang, Guan Hongjie, Gao Guanghui, Xing Hechen, Xu Yingjie, Lü Bingbing, Lu Weiying, Ma Ming, Dong Jinchao, Xu Bin, and Wang Zhiyuan. The previous versions of this document and the documents it replaces are as follows. ---First published in.2005 as GB/T 19935-2005; ---This is the first revision. Worm gear nameplate, center distance, Parameters provided by the user to the manufacturer1 ScopeThis document specifies the requirements for worm gear nameplates, gives recommended values for center distances, parameters to be provided by the user to the manufacturer and Require. This document applies to the design and manufacture of closed worm gear transmissions with a center distance not exceeding 1000mm. This document does not provide parameters such as center height, module and worm diameter coefficient, shaft end structure and size, etc. The user and the manufacturer negotiate and agree upon this.2 Normative referencesThe contents of the following documents constitute essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 3374.2 Gear terms and definitions Part 2.Worm gear geometry definitions GB/T 3480.6 Calculation of load capacity of spur and helical gears Part 6.Calculation of service life under variable load conditions3 Terms and definitionsThe terms and definitions defined in GB/T 3374.2 apply to this document.4 NameplateOne or two permanent nameplates should be fixed in a prominent and stable position on all worm gear devices. The information given on the nameplate should include the following. ---Name or logo of manufacturer or supplier; ---Model (indicating transmission type, product series, etc.); ---Center distance (mm); ---Speed ratio; ---Rated input/output speed (r/min); ---Rated power (kW); ---Maximum instantaneous output torque (N·m); ---Mass (kg); ---Recommended lubricant type and oil quantity; ---Factory number and date of manufacture.5 Center distanceThe recommended values of the center distance series of worm gears are shown in Table 1. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 19935-2025_English be delivered?Answer: Upon your order, we will start to translate GB/T 19935-2025_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 19935-2025_English with my colleagues?Answer: Yes. 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Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 19935-2025 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
