GB/T 285-2013Rolling bearings - Double row cylindrical roller bearings - Boundary dimensions (English PDF)

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules.

This standard replaces GB/T 285-1994 "Rolling double row cylindrical roller bearings dimensions." And GB/T 285-1994 Compared to, in addition to editorial changes, the major technical changes are as follows.

--- Increasing the bearing roller set nominal value of the inner diameter and outer Fw Ew (see Table 1 to Table 4);

--- Expanding the NNU 49 series bearing type size range (see Table 1 and Table 3 of the 1994 edition);

--- Increase the NNU 41 series bearing type dimensions (see Table 2);

--- Remove the hole with a double row cylindrical roller bearings and model structure diagram (see the 1994 edition of FIGS. 5 to 8, Table 1 to Table 3);

--- Remove the old code control (see the 1994 edition of Appendix A). The standard proposed by China Machinery Industry Federation.

1 Scope

This standard specifies the dimensions in line with GB/T 273.3-1999 double row cylindrical roller bearings (hereinafter referred to as bearing) shape size.

This standard applies to double row cylindrical roller bearings in the design and selection.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document.

GB/T 272-1993 Rolling Code Method

GB/T 273.3-1999 Rolling bearings dimensions, general plan

GB/T 274-2000 Rolling maximum chamfer dimensions

GB/T 6930-2002 Rolling Words Supplementary Provisions JB/T 2974-2004 Rolling Code Method

3 Terms and Definitions

Terms and definitions GB/T 6930-2002 defined apply to this document.

4 Symbol

The following symbols apply to this document.

Unless otherwise indicated, the value shown in Figs. 1 to 4 and the symbol shown in Tables 1 to 4 are represented nominal size.

NOTE: Graphics only example of the structure.

B. Bearing width D. Bearing outside diameter d. bearing bore Ew. the outer diameter of the roller set Fw. inner diameter of the roller set r. bearing inner and outer ring chamfer dimensions rsmin. r smallest single chamfer dimension