Valid

JB/T 8925-2017Rolling bearings - Automotive universal joint cross assemblies - Technical requirements (English PDF)

滚动轴承汽车万向节十字轴总成技术条件

Preview PDF

This is a limited preview

Buy now to download the full PDF (15 pages)

Need quotation for your management?

Get a formal quotation for JB/T 8925-2017 in 30 minutes.

Issued by

MIIT

Level / Type

Industry · Recommended

Issue date

January 9, 2017

Implementation date

July 1, 2017

Scope

JB/T 8925-2017 is the English-translated version of 滚动轴承汽车万向节十字轴总成技术条件.

JB/T 8925-2017 is the Chinese standard "Rolling bearings - Automotive universal joint cross assemblies - Technical requirements".

Its scope clause reads: This standard specifies the terms, definitions and symbols, codes, technical requirements, test methods, inspection rules, and marking, rust prevention, packaging, transportation and storage of universal joint cross assemblies for automobile propeller shafts (hereinafter referred to as "assemblies").

This standard is applicable to the universal joint cross assemblies for propeller shafts of medium and light trucks, passenger vehicles and passenger cars. It may also be referred to by the universal joint cross assemblies on steering knuckles of heavy trucks, construction machinery and automobiles. Its clauses include terms, definitions and symbols (see figures 1 and 2).

Found what you need?

Document preview — JB/T 8925-2017

National Standard of the People's Republic of China

ICS: 21.100.20
Replacing: JB/T 8925-2008

Issued by: Ministry of Industry and Information Technology of the People's Republic of China

Foreword
1 Scope
2 Normative references
3 Terms, definitions and symbols (see Figures 1 and 2)
4 Assembly codes
5 Technical requirements
6 Test and inspection methods
7 Inspection rules
8 Marking, rust prevention, packaging, transportation and storage
Annex A (Normative) Test method of position of cross journal

1 Scope

This standard specifies the terms, definitions and symbols, codes, technical requirements, test methods, inspection rules, and marking, rust prevention, packaging, transportation and storage of universal joint cross assemblies for automobile propeller shafts (hereinafter referred to as "assemblies").

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 230.1-2009 Metallic materials - Rockwell hardness test - Part 1: Test method (scales A, B, C, D, E, F, G, H, K, N, T)

GB/T 1958-2004 Geometrical product specifications (GPS) - Geometrical tolerance - Verification prescription

GB/T 3077-2015 Alloy structure steels

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

GB/T 4340.1-2009 Metallic materials - Vickers hardness test - Part 1: Test method

GB/T 5671-2014 General purpose lithium lubricating grease for automobile

GB/T 6930-2002 Rolling bearings - Vocabulary

GB/T 8597-2013 Rolling bearings - Rust proof packaging

GB/T 9450-2005 Steels - Determination and verification of the depth of carburized and hardened cases

GB/T 24608-2009 Inspection rules for rolling bearings and commercial parts

GB/T 25744-2010 Metallographic examination for carburizing quenching and tempering of steel parts

JB/T 1255-2014 Rolling bearings - Parts made from high-carbon chromium bearing steels - Specifications for heat treatment

JB/T 3232-2017 Rolling bearings - Needle roller bearings for universal joints

JB/T 6639-2015 Rolling bearings - Rubber seals reinforced with a sheet steel insert - Specifications

JB/T 6641-2017 Rolling bearings - Residual magnetism and its assessment method

JB/T 7051-2006 Rolling bearing parts - Methods for the measurement and assessment of surface roughness

JB/T 7940.1-1995 Straight hydraulic grease nipples

JB/T 7940.2-1995 Angle hydraulic grease nipples

JB/T 7940.7-1995 Grease nipples and lubricating cups - Technical specification

QC/T 523-1999 Bench test method for automobile propeller shaft assembly

3 Terms, definitions and symbols (see Figures 1 and 2)

3.1 Terms and definitions

For the purposes of this document, the terms and definitions given in GB/T 6930-2002 and the following apply.

3.1.1 universal joint

an articulated mechanical device capable of transmitting torque and rotational motion from one shaft to the other when the angle between the two shafts remains constant or changes

3.1.2 automobile universal joint cross assembly

a component for automobile propeller shafts, consisting of a needle roller bearing and a cross

3.1.3 cross

an intermediate transmission element with four radially uniformly distributed journals in the same plane

3.1.4

static safety coefficient for torsional strength ratio of the torque measured when the assembly reaches the yield point in the static torsional strength test to the rated torque

3.1.5 torsional fatigue life

number of cycles of an assembly under the action of a specified alternate torque to the time when a certain assembly part is damaged

3.1.6 wear life

time of continuous operation at room temperature with the rated torque applied to the assembly until the assembly temperature rises to 60°C±5°C

3.1.7 rated torque

torque that the product can withstand, which is calculated according to the dimensions of the parts within the assembly

3.2 Symbols

For the purposes of this document, the symbols given in GB/T 4199-2003 and the following apply.

A: distance between two pilot holes of the wing-shaped universal joint cross assembly.

D, D1, D2: nominal outside diameter of the bearing;

dc: nominal diameter of the cross journal.

L, L1, L2: assembled length of the assembly (or assembled arc diameter of wing-shaped universal joint cross assembly).

l: distance between two end faces of the cross.

ns: static safety coefficient for torsional strength.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

Cited by

Similar standards

QC/T 29051-1992|QC/T 647-2000|JB/T 13124-2017|JB/T 12945-2016|JB/T 12051-2014|JB/T 3370-2011

Editions of JB/T 8925

Edition	Title	Revision	Status
JB/T 8925-2017	Rolling bearings - Automotive universal joint cross assemblies - Technical requirements	current edition	Current
JB/T 8925-2008	Rolling bearings - Automotive universal joint cross assemblies - Technical requirements	previous edition	Superseded

This page sells the current edition, JB/T 8925-2017. Earlier editions are listed for reference only.

How to Download JB/T 8925-2017

1
Add to cart
Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.
2
Checkout
Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).
3
Instant delivery (0–9 sec)
Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.
4
Invoice included
A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.