1 Scope
This standard specifies the technical requirements, measuring methods, inspection rules, marking and packaging of thrust tapered roller bearing whose inside diameter d is less than or equal to 1250mm and boundary dimension meets the requirements of GB/T 273.2-1998.
This standard is applicable to manufacture, inspection and acceptance of thrust tapered roller bearing.
2 Normative References
The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding corrigenda), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest edition of the normative document applies.
GB/T 273.2-1998 Rolling Bearings - Thrust Bearings - Boundary Dimensions - General Plan (eqv ISO 104, 1994)
GB/T 274-2000 Rolling Bearings - Chamfer Dimension - Maximum Values (idt ISO 582: 1995)
GB/T 307.2-2005 Rolling Bearings - Measuring and Gauging Principles and Methods (ISO 1132-2: 2001, Rolling Bearings - Tolerances - Part 2: Measuring and Gauging Principles and Methods, MOD)
GB/T 4199-2003 Rolling Bearings - Tolerances – Definitions (ISO 1132-1: 2000, Rolling Bearings - Tolerances-Part 1: Terms and Definitions, MOD)
GB/T 8597-2003 Rolling Bearings - Rust Proof Packaging
GB/T 18254-2002 High-carbon Chromium Bearing Steel
JB/T 1255-2001 Specification for Heat-treatment of Rolling Bearing Parts Made from High Carbon Chromium Steel
JB/T 3574-1997 Rolling Bearings - Marking for Products
JB/T 6641-1993 Rolling Bearings - Residual Magnetism and Its Assessment Method
JB/T 7051-1993 Rolling Bearing Parts - Methods for the Measurement and Assessment of Surface Roughness
JB/T 8196-1996 Rolling Bearings - Residual Magnetism and Its Assessment Method
JB/T 8921-1999 Rolling Bearings and Commercial Parts - Inspection Rules
3 Symbols (see Figures 1~3)
Except the following symbols, the definition of symbols quoted in this standard is in accordance with the requirements of GB/T 4199.
Δ(180°-2β): deviation for tapered angle of shaft washer raceway of thrust tapered roller bearing
Δ(180°-2α): deviation for tapered angle of housing washer raceway of thrust tapered roller bearing
Figure 1 Thrust Roller Bearing
Figure 2 Shaft Washer
Figure 3 Housing Washer
4 Technical Requirements
