GB/T 39741.2-2021

Active

Plain bearings—Tolerances—Part 2：Tolerances on geometrical characteristics and surface roughness for shafts and thrust collars

滑动轴承公差第2部分：轴和止推轴肩的几何公差及表面粗糙度

Standard Type

GBT

ICS

21.100.10

CCS

J12

Status

Active

Issue Date

2021-03-09

Implementation

2021-10-01

Centralized Committee

中国机械工业联合会

Issuing Authority

国家市场监督管理总局、中国国家标准化管理委员会

Application Summary AI generated

This standard specifies the permissible geometrical tolerances (such as roundness, cylindricity, and runout) and surface roughness values for shafts and thrust collars used in plain bearing assemblies. It is applied in the design, manufacturing, and quality inspection of rotating machinery, such as engines, pumps, and turbines, where precise shaft-bearing interfaces are critical for performance and wear resistance. The standard ensures consistent fit and lubrication conditions between the shaft and bearing surface.

Related Standards

JB/T 51110-1999 Internal Combustion Engines - Cylinder Head Gaskets - Product Quality Grading (Internal Use) JB/T 51134-1999 Product quality grading of agricultural deep groove ball bearing GB/T 5868-2003 Rolling bearings--Mounting dimensions GB/T 4605-2003 Rolling bearings--Thrust needle roller and cage assemblies，thrust washers GB/T 4199-2003 Rolling bearings--Tolerances--Definitions GB/T 307.3-2005 Rolling bearings-General technical regulations GB/T 307.2-2005 Rolling bearings-Measuring and gauging principles and methods GB/T 307.1-2005 Rolling bearings-Radial bearings-Tolerances

Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.