GB/T 304.9-1981
Replaced
GB/T 27556-2025
Active
National standards
GB/T 27556-2025 Rolling bearings—Radial bearings,retaining slots—Dimensions,geometrical product specifications (GPS)and tolerance values
GB/T 27556-2025 Rolling bearings—Radial bearings,retaining slots—Dimensions,geometrical product specifications (GPS)and tolerance values
Basic Information
Standard Code:
GB/T 27556-2025
Standard Type:
National standards
Standard Status:
Active
is_force_gb:
no
CCS Name:
Rolling bearings
ICS Name:
Rolling bearings
Publish Date:
2025-10-31
Implement Date:
2026-02-01
Pages:
20 pages
Scope
This document specifies the dimensions and tolerances of the locating grooves on the outer rings of single-row angular contact ball bearings, four-point contact ball bearings, and cylindrical roller bearings.
The locating grooves are not suitable for use on the outer rings of sealed and dust-proof centric ball bearings, nor on the outer rings of flangeless cylindrical roller bearings.
Development Information
Replace the following standards
Referenced Standards
ISO 15
ISO 1101
ISO 5593
ISO 14405-1
ISO 15241
ISO 22872
Adopt standards
ISO 20515:2021
Related Standards
GB/T 7948-1987
Replaced
GB/T 7948-1987 Test method for PV limit of plastics bearings
GB/T 12764-1991
Replaced
GB/T 12764-1991 Rolling bearings—Needle roller bearings, drawn cup, without inner ring—Boundary dimension plan
GB/T 275-1993
Replaced
GB/T 275-1993 Shaft and housing fits for rolling bearings
GB/T 4662-1993
Replaced
GB/T 4662-1993 Rolling bearings—Static load ratings
GB/T 4604-1993
Replaced