This standard applies to small power built-in motors used in control devices and other equipment, with a size range of flange number BF10 to BF50. GB/T 4772.3-1999 Dimensions and output power levels of rotating electrical machines Part 3: Small power built-in motors with flange number BF10 to BF50 GB/T4772.3-1999 Standard download decompression password: www.bzxz.net

GB/T 4772.3-1999
GB/T4772 "Dimensions and output power levels of rotating electrical machines" includes the following three parts: Part 1 (i.e. GB/T4772.1): Frame size 56~400 and flange size 55~1080; Part 2 (i.e. GB/T4772.2): Frame size 355~1000 and flange size 1180~2360; Part 3 (i.e. GB/T4772.3): Flange size BF10~BF50 for small power built-in motors. This standard is Part 3 of GB4772 "Dimensions and output power levels of rotating electrical machines". This standard is equivalent to IEC72-3:1994 "Dimensions and output power levels of rotating electrical machines Part 3: Flange size BF10BF50 for small power built-in motors".
After implementation, this standard will replace GB/T4772.3-1984 "Electric Motor Dimensions and Tolerances Flange Number BF10~BF50 Small Enclosed Motors".
This standard was proposed by the State Machinery Industry Bureau. This standard is under the jurisdiction of the National Technical Committee for Standardization of Rotating Electric Machines. This standard was drafted by the Guangzhou Electric Science Research Institute. The main drafters of this standard are Huang Shiguan and He Weien. 51
GB/T4772.3-1999
IEC Foreword
1) The International Electrotechnical Commission (IEC) is a worldwide standards organization that includes all national electrotechnical technical committees (IEC National Committees). The purpose of IEC is to promote international cooperation on all standardization issues in the field of electrical and electronic technology. To this end, among other activities, IEC also promulgates international standards. The drafting of standards is entrusted to various technical committees. Any IEC National Committee interested in the subject involved can participate in the drafting of standards, and international, governmental and non-governmental organizations associated with IEC can also participate in the drafting of standards. IEC and the International Organization for Standardization (ISO) work closely together under the terms of the agreement. 2) IEC's formal decisions or agreements on technical topics express international consensus on the topic as much as possible. Because each technical committee represents all national committees interested in the topic. 3) The documents developed for international application are recommended and are published in the form of standards, technical reports or guidelines, and are accepted by the national committees in this sense.
4) In order to promote international consistency, the IEC national committees explicitly guarantee to adopt IEC standards as much as possible in their national or regional standards. Any differences between the corresponding national or regional standards and IEC standards should be clearly stated in the standard. 5) IEC does not provide an identification procedure to indicate its approval, nor does it assume any responsibility for any equipment that claims to comply with its standards. International standard IEC72-3 was prepared by SC2B "Dimensions and output power levels" of IECTC2 (rotating motors). This standard is based on the following documents:
June Legal Document
2B(CO)47
For details of the voting on this standard, see the voting report listed in the table above. Voting Report
2B(CO)49
IEC72 "Dimensions and output series for rotating electrical machines" consists of the following three parts: Part 1: Frame size 56~400 flange number 551080; Part 2: Frame size 355~1000 flange number 1180~2360; Part 3: Flange number BF10~BF50 for small power built-in motors.52
National Standard of the People's Republic of China
Dimensions and output series for rotating electrical machines
Part 3: Flange number BF10~BF50 for small power built-in motors
electrical machines Part 3: SAMll built-in motors Flange numbers BF10 to BF50 1 Scope
GB/T4772.3—1999
idt IEC72-3:1994
Replaces GB/T4772.3-1984
This standard applies to small power built-in motors used in control devices and other equipment, with a size range of flange numbers BF10 to BF50. 2 Dimensions
The dimensions shown in Figure 1 and the number of mounting holes S shall comply with the provisions of Table 1. Dimensions not marked shall comply with actual use requirements. Note: Since these motor shafts have no shoulders, when installing components on the shaft, care should be taken to leave space between the component and the flange, or to insert a gasket between the rolling bearing inner figure and the driven component.
Table 1 Dimensions
Flange number
Basic dimensions
Limit deviation 3
Approved by the State Administration for Quality and Technical Supervision on February 26, 1999 Number of screw holes
Thread?
Limit deviation 3)
Implemented on September 1, 1999
Flange number
Basic dimensions
Limit deviation"
1) Avoid using the values ​​in brackets as much as possible. GB/T4772.3—1999
Table 1 (end)
Number of screw holes\Www.bzxZ.net
The arrangement of screw holes has nothing to do with the position of the pole and brush axis. 2) If it is a short motor, M1.6 can also be used with flange BF16. 3) Meet the requirements of ISO286-2.
Thread 2
Limit deviation"
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