1 Scope
This standard specifies the boundary dimensions and tolerances for full complement needle roller bearings of dimension series 48/49/40.
This standard is applicable to full complement needle roller bearings for the design and inspection of the bearing manufacturer as well as the type selection and acceptance of the user.
This standard is not applicable to drawn cup full complement 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 (excluding amending errors in the text), 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 the normative document is applicable. For undated references, the latest edition of the normative document applies.
GB/T 274-2000 Rolling Bearings - Chamfer Dimension - Maximum Values (idt ISO 582:1995)
GB/T 1801-1999 Limits and Fits - Selection of Tolerance Zones and Fits (eqv lSO 1829:1975)
GB/T 4199-2003 Rolling Bearings - Tolerances – Definitions (ISO 1132-1:2000, Rolling Bearings - Tolerances - Part 1: Terms and Definitions, 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
Contents
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Symbols (See Figure 1 and Figure 2)
5 Boundary Dimensions
6 Tolerance
7 Radial Internal Clearance
8 Matched Installation of Bearing
Appendix A (Normative) Boundary Dimensions for Full Complement Needle Roller Bearings of Dimension Series 40
Appendix B (Normative) Technical Conditions for the Joint of Bearing and Casing
B.1 Dimension and Shape Tolerances of Casing Hole
B.2 Shaft Corresponding to the Bearing without Inner Ring
Figure 1 Type NAV Full Complement Needle Roller Bearings
Figure 2 Type RNAV Full Complement Needle Roller Bearings without Inner Ring
