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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: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 19935-2025 | English | 199 |
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Name plates, centre distances, information to be supplied to gear manufacturer by the purchaser for worm gear units
| Valid |
GB/T 19935-2025
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| GB/T 19935-2005 | English | 154 |
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Worm gears -- Geometry of worms -- Name plates for worm gear units, centre distances, information to be supplied to gear manufacturer by the purchaser
| Valid |
GB/T 19935-2005
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PDF similar to GB/T 19935-2025
Basic data | Standard 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Count Estimation | 9,965 | | Date of Issue | 2025-05-30 | | Date of Implementation | 2025-12-01 | | Older Standard (superseded by this standard) | GB/T 19935-2005 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T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 contents
Preface 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 5
Foreword
This 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 manufacturer
1 Scope
This 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 references
The 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 conditions
3 Terms and definitions
The terms and definitions defined in GB/T 3374.2 apply to this document.
4 Nameplate
One 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 distance
The recommended values of the center distance series of worm gears are shown in Table 1.
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