This Standard specifies the boundary dimensions and normal class tolerances for needle roller bearings of dimension series 48, 49 and 69 as given in GB/T 273.3-1999.
This Standard apply to complete needle roller bearings and to bearings without inner ring.
This Standard does not apply to drawn cup needle roller bearings.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 273.3-1999 Rolling Bearings — Radial Bearing — Boundary Dimensions, General Plan (eqv ISO 15:1998)
GB/T 274-2000 Rolling Bearings — Chamfer Dimensions — Maximum Values (idt ISO 582:1995)
GB/T 275-1993 Shaft and Housing Fits for Rolling Bearings
GB/T 4199-2003 Rolling Bearings — Tolerances— Definitions (ISO 1132-1:2000,, MOD)
GB/T 4604-2006 Rolling Bearings — Radial Internal Clearance (ISO 5753:1991, MOD)
GB/T 6930-2002 Rolling Bearings — Vocabulary (ISO 5593:1997, IDT)
GB/T 7811-1999 Rolling Bearings — Symbols for Quantities
