GB/T 307.3-2017Rolling bearings - General technical regulations (English PDF)

Foreword

GB/T 307 Rolling bearings consists of the following four parts.

- GB/T 307.1-2005, Rolling bearings - Radial bearings - Tolerances;

- GB/T 307.2-2005, Rolling bearings - Measuring and gauging principles and methods;

- GB/T 307.3-2017, Rolling bearings - General technical regulations;

- GB/T 307.4-2012, Rolling bearings - Tolerances - Part 4. Tolerances for thrust bearings.

This Part if the third part of GB/T 307.

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

This Part replaces GB/T 307.3-2005 Rolling bearings - General technical regulations. Compared with GB/T 307.3-2005, the main technical changes in this Part are:

- modified the level, number and name of some reference standards (see Clause 2 of this Edition, Clause 2 of Edition 2005);

- subdivided the surface roughness value for nominal diameter of 80mm ~ 500mm and modified some surface roughness values (see Table 1 of this Edition; Table 1 of Edition 2005);

- added the clearances of four-point-contact ball bearings and double, four-row tapered roller bearings as well as measurement methods (see 5.6, 5.16.3 of this Edition);

- added the sealing, cleanliness and appearance quality requirements of bearing (see 5.11~5.13 of this Edition);

- added the calculation method for rated thermal speed of bearing (see 5.15.3 of this Edition);

- added the measurement method for bearing surface roughness (see 5.16.4 of this Edition);

- added the bearing cleanliness, inspection method for appearance quality as well as test and evaluation of service life (see 5.16.8~5.16.10 of this Edition);

- added the rolling body (ceramic ball, tapered roller), cage, seal and dust cover requirements (see 6.1~6.3 of this Edition);

1 Scope

This Part of GB/T 307 specifies the general technical regulations for rolling bearings.

This Part is applicable to rolling bearings of general purpose. For special-purpose bearings, additional technical conditions may be formulated.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 271, Rolling bearings - Classification

GB/T 272, Rolling bearing - Identification code

GB/T 273.1, Rolling bearings - Tapered roller bearing - Plan of boundary dimensions

GB/T 273.2, Rolling bearings - Thrust bearings - Boundary dimensions, general plan

GB/T 273.3, Rolling bearings - Boundary dimensions, general plan - Part 3. Radial bearings

GB/T 274, Rolling bearings - Chamfer dimension - Maximum values

GB/T 275, Rolling bearings - Fits

GB/T 305, Rolling bearings - Snap ring groove and snap ring on outer ring - Dimensions and tolerances

GB/T 307.1, Rolling bearings - Radial bearings - Tolerances

GB/T 307.2, Rolling bearings - Measuring and gauging principles and methods

GB/T 307.4, Rolling bearings - Tolerances - Part 4. Tolerances for thrust bearings

GB/T 308.1, Rolling bearings - Balls - Part 1. Steel balls

GB/T 308.2, Rolling bearings - Balls - Part 2. Ceramic balls

GB/T 309, Rolling bearings - Needle rollers

GB/T 4604.1, Rolling bearings - Internal clearance - Part 1. Radial internal clearance for radial bearings

GB/T 4604.2, Rolling bearings - Internal clearance - Part 2. Axial internal clearance for four-point-contact ball bearings

GB/T 4661, Rolling bearings - Cylindrical rollers

GB/T 4662, Rolling bearings - Static load ratings

GB/T 5868, Rolling bearings - Mounting dimensions

GB/T 6391, Rolling bearings - Dynamic load ratings and rating life

GB/T 6930, Rolling bearings - Vocabulary

GB/T 7811, Rolling bearings - Symbols for physical quantities

GB/T 7813, Rolling bearings - Split type plummer block housings - Boundary dimensions

GB/T 8597, Rolling bearings - Rust proof packaging

GB/T 9160.1, Rolling bearings - Accessories - Part 1. Adapter sleeve assemblies and withdrawal sleeves

GB/T 9160.2, Rolling bearings - Accessories - Part 2. Locknuts and locking devices

GB/T 18254, High-carbon chromium bearing steel

GB/T 24605, Rolling bearings - Marking for products

GB/T 24607, Rolling bearings - Test and assessment for life and reliability

GB/T 24608, Inspection rules for rolling bearings and commercial parts

GB/T 24609, Rolling bearings - Thermal speed rating - Calculation and coefficients

GB/T 24610.2, Rolling bearings - Measuring methods for vibration - Part 2. Radial ball bearings with cylindrical bore and outside surface

GB/T 24610.3, Rolling bearings - Measuring methods for vibration - Part 3.

Radial spherical and tapered roller bearings with cylindrical bore and outside surface

GB/T 24610.4, Bearings - Measuring methods for vibration - Part 4. Radial cylindrical roller bearings with cylindrical bore and outside surface

GB/T 24611, Rolling bearings - Damage and failures - Terms, characteristics and causes

GB/T 25767, Rolling bearings - Tapered rollers

GB/T 25769, Rolling bearings - Measuring methods for radial internal clearance

GB/T 28268, Rolling bearings - Specifications of pressed cages

GB/T 32323, Rolling bearings - Measuring methods for axial internal clearance of four-point-contact ball bearings

GB/T 32325, Rolling bearings - Specifications for vibration (velocity) of deep groove ball bearings

GB/T 32333, Rolling bearings - Measuring methods and specifications for vibration (acceleration)

JB/T 1255, Rolling Bearings - Parts made from high-carbon chromium bearing steels - Specifications for heat treatment

JB/T 6639, Rolling bearing parts - Skeleton acrylonitrile-buta-diene copolymers seal - Specifications

JB/T 6641, Rolling bearings - Residual magnetism and its assessment method

JB/T 7048, Rolling bearing parts - plastic cage-specifications

JB/T 7050, Rolling bearings - Assessment methods for cleanliness

JB/T 7051, Rolling bearing parts - Methods for the measurement and assessment of surface roughness

JB/T 7752, Rolling bearings - Sealed deep groove ball bearings - Specifications

JB/T 8236, Rolling bearings - Internal clearances and adjusting methods for double-row and four-row tapered roller bearings

JB/T 8874, Rolling bearings - Split type plummer block housings - Specifications

JB/T 8922, Rolling bearings - Specifications for vibration(velocity)of cylindrical roller bearings

JB/T 10236, Rolling bearings - Specifications of vibration (velocity) for tapered roller bearings -Specifications

JB/T 10237, Rolling bearings - Specifications of vibration (acceleration) for tapered roller bearings

JB/T 10239, Rolling bearings - Specifications of curled shield for deep groove ball bearings

JB/T 11841, Rolling bearing parts - Metal solid cages - Specifications

3 Terms and definitions

For the purposes of this document, the terms and definitions defined in GB/T 6930 apply.

4 Symbols

The symbols provided in GB/T 7811 apply to this document.

5 Bearings