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.
Basic Data
Standard ID
GB/T 4772.1-2025 (GB/T4772.1-2025)
Description (Translated English)
Dimensions and output series for rotating electrical machines - Part 1: Frame numbers 56 to 400 and flange numbers 55 to 1080
Sector / Industry
National Standard (Recommended)
Classification of Chinese Standard
K20
Classification of International Standard
29.160.01
Word Count Estimation
30,312
Date of Issue
2025-08-01
Date of Implementation
2026-02-01
Older Standard (superseded by this standard)
GB/T 4772.1-1999
Issuing agency(ies)
State Administration for Market Regulation, Standardization Administration of China
