GB/T 7308-1987
Replaced
GB/T 39741.1-2021
Active
National standards
GB/T 39741.1-2021 Plain bearings—Tolerances—Part 1:Fits
GB/T 39741.1-2021 Plain bearings—Tolerances—Part 1:Fits
Basic Information
Standard Code:
GB/T 39741.1-2021
Standard Type:
National standards
Standard Status:
Active
is_force_gb:
no
CCS Name:
Sliding bearing
ICS Name:
Sliding bearings
Publish Date:
2021-03-09
Implement Date:
2021-10-01
Pages:
12 pages
Scope
This part of GB/T 39741 specifies the mating system for metal sliding bearings with an average relative clearance ψm of 0.56‰ to 3.15‰ in general machinery. Other clearance ranges can be selected according to the technical requirements of specific application scenarios.
This mating system is not suitable for thin-walled bearing bushes and thin-walled sleeve bearings, because thin-walled bearing bushes and thin-walled sleeve bearings have special characteristics. Their main measurement is the wall thickness rather than the diameter, and the dimensions will change with assembly.
This part is not suitable for non-circular bearings or tilting pad bearings, nor is it suitable for extreme clearance (extremely large or extremely small) conditions, where special tolerance requirements are determined after considering the bearing's working performance.
This part is mainly applicable to rotating machinery parts and spindles, and is also suitable for similar application scenarios.
Development Information
Same series standard
Adopt standards
ISO 12129-1:2019
Related Standards
GB/T 3162-1991
Replaced
GB/T 3162-1991 Plain bearings—Thin-walled bearing shells—Dimensions, structure elements and tolerances
GB/T 12948-1991
Replaced
GB/T 12948-1991 Plain bearings—Metallic multilay er plain bearings—Destructive testing of bond for bearing metals
GB/T 12949-1991
Abolished
GB/T 12949-1991 Plain bearings—Bimetallic bushes with plastic overlay
GB/T 13345-1992
Replaced
GB/T 13345-1992 General technical requirement of oil film bearing for rolling mill
GB/T 14910-1994
Replaced