GB/T 4661-2015Rolling bearings—Cylindrical rollers (English PDF)

Foreword

This Standard was drafted as per the rules specified in GB/T 1.1-2009. This Standard replaced GB/T 4661-2002 Rolling Bearings - Cylindrical Rollers;

Compared with GB/T 4661-2002, this Standard has the major technical changes as follows.

--- Added and modified part of terms and definitions (see Chapter 3 of this Edition; Chapter 2 of 2002 Edition);

--- Took "symbol" as an independent chapter, and added relevant symbols (see Chapter 4 of this Edition; Chapter 3 of 2002 Edition);

--- Increased and modified the dimension specifications of rollers (see Chapter 5 of this Edition; Chapter 4 of 2002 Edition);

--- Modified the roller grade and diameter tolerance (see Chapter 6 of this Edition; Chapter 5 of 2002 Edition);

--- Modified the roller technical requirements (see Chapter 6 and 7 of this Edition; Chapter 5 of 2002 Edition);

--- Modified roller marks etc. (See Chapter 8 of this Edition; Chapter 9 of 2002 Edition);

--- Added roller diameter gauge value and classification rules (see Appendix A);

--- Added roller length gauge value and classification rules (see Appendix B).

1 Scope

This Standard specifies the dimensions, technical requirements, inspection and measurement methods, inspection rules, marks, package and storage for finished product of steel cylindrical rollers used by rolling bearings.

This Standard is applicable to the steel cylindrical rollers (hereinafter referred to as roller) for the supporting and commercializing usage of the rolling bearings.

2 Normative References

The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this document.

GB/T 4199-2003 Rolling Bearings - Tolerances - Definitions

GB/T 6930-2002 Rolling Bearings - Vocabulary

GB/T 7235 Geometrical Product Specifications(GPS) - Methods for the Assessment of Departure from Roundness - Measurement of Variations in Radius

GB/T 7811 Rolling Bearings - Symbols for Quantities

GB/T 8597 Rolling Bearings - Rust Roof Packaging

GB/T 18254 High-Carbon Chromium Bearing Steel

GB/T 18579 High-Carbon Chromium Bearing Steel Wires

GB/T 24608 Inspection Rules for Rolling Bearings and Commercial Parts

GB/T 24632.1 Geometrical Product Specifications (GPS) - Roundness - Part 1: Vocabulary and Parameters

JB/T 1255 Rolling Bearings - Parts Made from High-Carbon Chromium Bearing Steels - Specifications for Heat Treatment

JB/T 6641 Rolling Bearings - Residual Magnetism and its Assessment Method

JB/T 7051 Rolling Bearing Parts - Methods for the Measurement and Assessment

3 Terms and Definitions

4 Symbols

The following symbols and the ones stipulated in GB/T 7811 are applicable to this document.

Unless otherwise is specified, the symbols shown in Figure 1 (except for the tolerance symbol) and the values shown in Table 1 are the nominal dimensions. Dw. roller diameter; DwmL. mean diameter of roller diameter gauge lot; G. roller grade; IGDw. interval of roller diameter gauge; IGLw. interval of roller length gauge; La. roller effective length, La=Lw-2r; Lw. roller length;

LwmL. mean length of roller length gauge lot; r. chamfer dimension; rs. single chamfer dimension;

The plain lines on the roller surface shall conduct crown modification; its convexity and crown values shall be determined by the product drawing.

6 Technical Requirements

7 Inspection and Measurement Methods

7.1 The roller diameter and diameter variation shall be measured in the middle of the roller by two-point method.

7.2 The measurement of deviation from circular form of roller can refer to the provisions of Appendix C.

7.3 The measurement of roller length and length variation shall be performed by placing the measured roller between instrument probe and the plane perpendicular to the measured axis or by the two-point method. […]