JB/T 6644-2007 (English Version) PDF

Scope: This standard specifies the structural type, dimensions and technical conditions of needle roller and bidirectional thrust cylindrical roller combined bearings (hereinafter referred to as combined bearings). This standard applies to the production and inspection of combined bearings by bearing manufacturers and the selection and acceptance of finished combined bearings by users.

JB/T 6644-2007 Referenced Document

GB/T 18254-2002 High-carbon chromium bearing steel
GB/T 307.2-2005 Rolling bearings-Measuring and gauging principles and methods
GB/T 307.3-2005 Rolling bearings-General technical regulations
GB/T 4199-2003 Rolling bearings--Tolerances--Definitions
GB/T 4604-2006 Rolling bearings.Radial internal clearance
GB/T 8597-2003 Rolling bearings-Rust proof packaging
JB/T 1255-2001 Specification for heat-treatment of rolling bearing parts made from high carbon chromium steel
JB/T 3573-2004 Rolling bearings-Methods for the measurement of radial internal clearance
JB/T 6641-2007 Rolling bearings.Residual magnetism and its assessment method
JB/T 7051-2006 Rolling bearings parts.Methods for the measurement and assessment of surface roughness

2007 JB/T 6644-2007 Rolling bearings Combined needle roller bearings with double direction thrust roller bearings
1993 JB/T 6644-1993 Dimensions and tolerances of rolling bearing needle roller and double direction axial cylindrical roller combined bearings