GB/T 4772.1-2025 PDF English
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| GB/T 4772.1-2025 | English | 410 |
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Dimensions and output series for rotating electrical machines - Part 1: Frame numbers 56 to 400 and flange numbers 55 to 1080
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| GB/T 4772.1-1999 | English | 1279 |
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Dimensions and output series for rotating electrical machines. Part 1: Frame numbers 56 to 400 and flange numbers 55 to 1 080
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| GB/T 4772.1-1984 | English | RFQ |
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Dimensions and tolerances for rotating electrical machines--Machines with frame numbers 36 to 400 and flange numbers FF55 to FF1080 or FT55 to FT1080
| Obsolete |
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Similar standards GB/T 51033 GB/T 4772.1-2025: Dimensions and output series for rotating electrical machines - Part 1: Frame numbers 56 to 400 and flange numbers 55 to 1080
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT4772.1-2025
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.160.01
CCS K 20
GB/T 4772.1-2025 / IEC 60072-1.2022
Replacing GB/T 4772.1-1999
Dimensions and output series for rotating electrical
machines - Part 1.Frame numbers 56 to 400 and flame
number 55 to 1080
55 ~ 1080
(IEC 60072-1.2022, Rotating electrical machines - Dimensions and output series -
Part 1.Frame number 56 to 400 and flange numbers 55 to 1080, IDT)
Issued on: AUGUST 01, 2025
Implemented on: FEBRUARY 01, 2026
Issued by. Status Administration for Market Regulation;
National Standardization Administration.
Table of Contents
Foreword... 3
Introduction... 5
1 Scope... 6
2 Normative references... 6
3 Terms and definitions... 7
4 Symbols... 7
4.1 Dimensional symbols... 7
4.2 Dimensional diagram... 10
5 Motor dimension designation... 12
5.1 Frame number... 12
5.2 Flange number... 12
5.3 Shaft extension... 12
6 Terminal box location... 12
6.1 Motors with foot... 12
6.2 Motors without foot... 13
7 Mounting dimensions and tolerances... 13
7.1 Overview... 13
7.2 Foot-mounted motors... 13
7.3 Flange-mounted motors... 15
8 Shaft end dimensions and tolerances... 16
8.1 Shaft end dimensions... 16
8.2 Parallelism of the shaft to the foot plane... 17
8.3 Axis parallelism of keyway to shaft... 18
8.4 Lateral runout of keyway... 18
9 Test method... 18
9.1 Overview... 18
9.2 Shaft extension runout... 19
9.3 Radial runout of the flange end to motor axis... 19
9.4 End circular runout of the flange mounting surface to motor axis... 20
9.5 Parallelism of shaft to foot plane... 20
9.6 Parallelism of keyway to shaft axis... 21
9.7 Keyway lateral displacement... 21
10 Preferred rated output power... 22
11 Relationship between frame number, shaft extension, rated power, and flange
number... 24
Appendix A (Informative) Relationships between other frame numbers and rated output
power... 28
Appendix B (Informative) Other recommended letters and dimensions... 29
References... 30
Foreword
This document was drafted in accordance with the provisions of GB/T 1.1-2020
"Directives for standardization - Part 1.Rules for the structure and drafting of
standardizing documents".
This document is Part 1 of GB/T 4772 "Dimensions and output series for rotating
electrical machines". The following parts of GB/T 4772 have been published.
- Part 1.Frame numbers 56 to 400 and flange numbers 55 to 1080;
- Part 2.Frame numbers 355 to 1000 and flange numbers 1180 to 2360;
- Part 3.Small built-in motors - Flange numbers BF10 to BF50.
This document replaces GB/T 4772.1-1999 "Dimensions and output series for rotating
electrical machines - Part 1.Frame numbers 56 to 400 and flange numbers 55 to 1080".
Compared to GB/T 4772.1-1999, in addition to structural adjustments and editorial
changes, the major technical changes are as follows.
- ADD the motor dimension symbols such as AC' and BC (see Chapter 4);
- CHANGE the motor dimension symbol description (see Chapter 5; Chapter 4 of
the 1999 edition);
- CHANGE the installation dimension tables for foot-mounted motors and flange-
mounted motors (see Tables 1 and 2; Tables 1 and 3 of the 1999 edition);
- CHANGE the tables of key, keyway, shaft dimensions, adding dimensions for D
values of 120 to 150 (see Table 3; Table 4 of the 1999 edition);
- CHANGE the shaft-to-foot parallelism (see 8.2; C4.1 of the 1999 edition);
- CHANGE the parallelism of the keyway to the shaft axis (see 8.3; C5.1 of the 1999
edition);
- CHANGE the lateral displacement of the keyway (see 8.4; C5.2 of the 1999
edition);
- CHANGE the shaft runout test method (see 9.2; C6.2 of the 1999 edition);
- ADD test methods for shaft parallelism to the foot plane, keyway parallelism to the
shaft axis, keyway lateral displacement (see 9.5, 9.6, 9.7);
- CHANGE the preferred rated output power table (see Table 6; Table 7 of the 1999
edition);
- ADD the relationship between frame number, shaft extension, rated power, flange
number (see Chapter 11).
This document identically adopts IEC 60072-1.2022 "Rotating electrical machines -
Dimensions and output series - Part 1.Frame number 56 to 400 and flange numbers 55
to 1080".
This document has been modified for the following minimal editorial purposes.
- To align with existing standards, CHANGE the standard title to "Dimensions and
output series for rotating electrical machines - Part 1.Frame numbers 56 to 400
and flame number 55 to 1080".
Please note that some content in this document may involve patents. The issuing
organization of this document assumes no responsibility for identifying patents.
This document was proposed by the China Electrical Equipment Industry Association.
This document shall be under the jurisdiction of the National Technical Committee for
Standardization of Rotating Electrical Machines (SAC/TC 26).
Drafting organizations of this document. Shanghai Motor System Energy Saving
Engineering Technology Research Center Co., Ltd., Jiangsu Dazhong Motor Co., Ltd.,
Jiamusi Motor Co., Ltd., Anhui Wannan Motor Co., Ltd., Hebei Motor Co., Ltd.,
Nanyang Explosion-Proof (Suzhou) Special Equipment Co., Ltd., Xi'an Xima Motor
Co., Ltd., Inmonda Motor (China) Co., Ltd., Jiangsu Xianda Explosion-Proof Co., Ltd.,
Hunan Liancheng Rail Equipment Co., Ltd., Jiangsu Yali Explosion-Proof Motor Co.,
Ltd., Xiangtan Motor Co., Ltd., Wuhan Autebi Motor Co., Ltd., Shanghai ABB Motor
Co., Ltd., Shanghai Representative Office of the International Copper Professionals
Association, Ningbo Anxin CNC Technology Co., Ltd., Foshan Demart Intelligent
Equipment Technology Co., Ltd., Jiangsu Youqu Electromechanical Technology Co.,
Ltd.
The main drafters of this document. Tong Anni, Zhou Jian, Luan Hua, Wang Benben,
Li Zhuoqing, Liang Baogui, He Liqiang, Rao Xuan, Shi Benyan, Huang Lei, Hu Jing.
The previous versions of this document and the documents it replaces are as follows.
- It was first published in 1984 as GB/T 4772.1-1984;
- It was first revised in 1999, incorporating the content of GB/T 4826-1984 "Output
ratings for rotating electrical machines";
- This is the second revision.
Dimensions and output series for rotating electrical
machines - Part 1.Frame numbers 56 to 400 and flame
number 55 to 1080
1 Scope
This document applies to rotating motors for most industrial applications, with the
following size and power ranges.
- Foot-mounted. Shaft height. 56 mm ~ 400 mm;
- Flange-mounted. Flange base circle diameter. 55 mm ~ 1080 mm.
This document specifies the correspondence between mounting dimensions, shaft
extension dimensions, output power ratings and frame numbers.
2 Normative references
The contents of the following documents, through normative references, constitute
essential provisions of this document. For dated references, only the version
corresponding to that date applies to this document. For undated references, the latest
version (including all amendments) applies to this document.
ISO 128-3.2022 Technical product documentation (TPD) - General principles of
representation - Part 3.Views, sections and cuts
Note. The referenced content in ISO 128-3.2022 does not technically differ from that in ISO
128-3.2020.
ISO 273 Fasteners - Clearance holes for bolts and screws
Note. GB/T 5277-1985 Fasteners - Clearance holes for bolts and screws (ISO 273.1979,
IDT)
ISO 286 (all parts) Geometrical product specifications (GPS) - ISO code system for
tolerances on linear sizes
Note. GB/T 1800 (all parts) Geometrical product specifications (GPS) - ISO code system
for tolerances on linear sizes
ISO 1101 Geometrical product specifications (GPS) - Geometrical tolerances -
Tolerances of form, orientation, location and run-out
Note. GB/T 1182-2018 Geometrical product specifications (GPS) - Geometrical tolerancing
- Tolerances of form, orientation, location and run-out (ISO 1101.2017, MOD)
ISO 2768-1 - General tolerances - Part 1.Tolerances for linear and angular
dimensions without individual tolerance indications
Note. GB/T 1804-2000 General tolerances - Tolerances for linear and angular dimensions
without individual tolerance indications (ISO 2768-1.1989, IDT)
3 Terms and definitions
This document does not require the use of defined terms and definitions.
ISO and IEC maintain terminology databases for standardization at the following
addresses.
4 Symbols
4.1 Dimensional symbols
The following specified symbols are illustrated using the dimension diagram in Figure
1.Mandatory dimensions are marked with an *.
*A. Distance between the axis of the anchor bolt holes (end view)
AA. Foot width (end view)
AB. Distance between the outer edges of the foot (end view)
AC. Maximum width of the motor (maximum outer dimensions, including the fan
housing; not including the terminal box and foot)
AC'. Maximum height of the motor (maximum outer dimensions)
AD. Distance from the vertical centerline of the motor to the edge of the terminal
box or other protruding component mounted on the side of the motor
*B. Distance between the axis of the anchor bolt holes (side view)
BA. Foot length (D end; side view)
5 Motor dimension designation
5.1 Frame number
Motors can be designated by frame number, which is defined as the distance from the
motor axis to the bottom of the foot (H dimension). The relationship between H
dimension and fixed dimensions (A, B, C, K) is shown in Table 1.
Recommended letter designations for frame number.
- S, short frame number;
- M, medium frame number;
- L, long frame number.
Table B.1 in Appendix B provides other recommended frame number letters.
Note. Frame numbers also apply to motors without feet.
5.2 Flange number
The flange number is defined as the base diameter M. Table 2 shows the dimensions of
M and its relationship to the fixed dimensions (N, P, R, S, T). The location of the holes
in the mounting flange is shown in Figure 1.
Recommended flange number letters.
- FF flange, with through holes;
- FT flange, with threaded holes.
5.3 Shaft extension
The shaft size designation is defined by the shaft extension diameter D. Table 3 shows
the dimensions of D and its relationship to related dimensions (e.g., E, key).
6 Terminal box location
6.1 Motors with foot
Viewed from the D-end of the motor, the terminal box should be located within an angle
of 10° from the motor's centerline to the right horizontal centerline, with its centerline
at the top of the motor and below the motor's centerline to the right.
In addition to the top location, the manufacturer may also locate the terminal box on
the left side upon user request.
Note. Provision should be made to ensure that cables can enter the terminal box from
any of the four mutually perpendicular directions.
6.2 Motors without foot
The terminal box location is not specified.
7 Mounting dimensions and tolerances
7.1 Overview
Tables 7 ~ 10 in Chapter 11 provide the corresponding relationships between shaft
extension, flange number, foot size, output power and frame number.
7.2 Foot-mounted motors
A, B, C, K shall be selected from Table 1.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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