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JB/T 8415-2011Internal combustion engines - Timing gears - Specifications (English PDF)

内燃机正时齿轮技术条件

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Issued by

MIIT

Level / Type

Industry · Recommended

Issue date

August 15, 2011

Implementation date

November 1, 2011

Scope

JB/T 8415-2011 is the English-translated version of 内燃机正时齿轮技术条件.

JB/T 8415-2011 is the Chinese standard "Internal combustion engines - Timing gears - Specifications".

Its scope clause reads: This standard specifies the terms and definitions, symbols, technical requirements, test methods, inspection rules, marking, packaging, transport and storage of crankshaft, camshaft, valve and oil supply mechanism and other finished gears of internal combustion engine.

This standard is applicable to the timing gears of reciprocating internal combustion engines with cylinder diameters less than or equal to 200 mm, as well as oil pump transmission gears, compressor pump gears, power steering pump gears and idler gears of reciprocating internal combustion engines with cylinder diameters less than or equal to 200 mm. Its clauses include terms and definitions.

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Document preview — JB/T 8415-2011

National Standard of the People's Republic of China

ICS: 27.020
Replacing: JB/T 8415-1996

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

Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Technical requirements
5.1 General
5.2 Materials and heat treatment
5.3 Blank
5.4 Gear blank accuracy
5.5 Gear accuracy
5.6 Tooth thickness, common normal length, spanned sphere (cylinder) size and upper and lower deviation of timing gear
5.7 Keyway and location pinhole
5.8 Timing angular deviation
5.9 Working surface roughness and gear tooth contact pattern
5.10 Surface cracks.
5.11 Grinding burn
5.12 Noise
5.13 Cleanliness and maximum particle size
5.14 Appearance quality and timing marking
6 Test method
6.1 Material
6.2 Heat treatment
6.3 Blank
6.4 Gear blank accuracy
6.5 Gear accuracy
6.6 Tooth thickness, common normal length, spanned sphere (cylinder) size and upper and lower deviation of gear
6.7 Gear keyway or location pinhole
6.8 Timing Angle
6.9 Surface roughness and gear tooth contact pattern
6.10 Surface cracks
6.11 Surface Burns
6.12 Test method for noise of timing gear
6.13 Cleanliness and maximum particle size
6.14 Appearance quality and timing marking
7 Inspection rules
7.1 Type inspection
7.2 End-of-manufacturing inspection
7.3 Random inspection
7.4 Sampling scheme and evaluation rules
8 Marking, packaging, transportation and storage
8.1 Marking
8.2 Packaging
8.3 Transportation
8.4 Storage
Annex A (Informative) Format of gear parameter table
Annex B (Normative) Test method for noise of timing gear

1 Scope

This standard specifies the terms and definitions, symbols, technical requirements, test methods, inspection rules, marking, packaging, transport and storage of crankshaft, camshaft, valve and oil supply mechanism and other finished gears of internal combustion engine.

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 documents (including any amendment) applies.

GB/T 191 Packaging — Pictorial marking for handling of goods

GB/T 230.1 Metallic materials — Rockwell hardness test — Part 1: Test method (Scales A, B, C, D, E, F, G, H, K, N, T)

GB/T 231.1 Metallic materials — Brinell hardness test — Part 1: Test method

GB/T 699 Quality carbon structure steels

GB/T 1095 Square and rectangular keyways

GB/T 1184-1996 Geometrical tolerancing — Geometrical tolerances for features without individual tolerance indications

GB/T 1348 Spheroidal graphite iron castings

GB/T 2828.1 Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection

GB/T 3077 Alloy structure steels

GB/T 3480 Calculation methods of load capacity for involute cylindrical gears

GB/T 3785.1 Electroacoustics — Sound level meters — Part 1: Specifications

GB/T 3821 Small and medium power internal combustion engines - Cleanliness limits and measurements

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

GB/T 5216 Structural steels with specified hardenability bands

GB/T 6394 Metal-methods for estimating the average grain size

GB/T 7232 Terminology of metal heat treatment

JB/T 9439 Grey iron castings

GB/T 10095.1~10095.2-2008 Cylindrical gears — System of accuracy

GB/T 11354-2005 Determination of nitrided case depth and metallographic microstructure examination for steel and iron parts

GB/T 13299 Steel — Determination of microstructure

GB/T 13320 Metellographic grading atlas and assessing method for steel die forgings

GB/T 17879 Gears — Surface temper etch inspection after grinding

GB/Z 18620 (all parts) Cylindrical gears — Code of inspection practice

GB/T 24733-2009 Austempered ductile iron (ADI) castings

JB/T 7516-1994 Heat treatment process of gas carburizing and its quality control

JB/T 9171 Gear flame or induction hardening process and its quality control

JB/T 9172 Gear nitriding and nitrocaburizing process and its quality control

JB/T 9173 Gear carbonitriding process and its quality control

JB/T 9204 Metallographic examination of induction hardened steel parts

JB/T 9205 Metallographic examination of peralitic graphite cast iron parts induction hardened

QC/T 262-1999 Metallographic examination of automobile carburized gear

TB/T 2247 Acceptance conditions for magnetic particle inspection of locomotive traction gear

TB/T 2248 Magnetic particle inspection method for locomotive traction gear

3 Terms and definitions

For the purposes of this standard, the terms and definitions given in GB/T 7232, GB/T 10095.1~10095.2-2008, GB/T 11354-2005, GB/T 24733-2009, QC/T 262-1999, and the following apply.

3.1 timing gear

gear that maintains a fixed phase relationship with the crankshaft of an internal combustion engine and accurately controls the opening and closing of valves and the timing of fuel injection or ignition of an internal combustion engine

3.2 cleanliness

cleanliness of parts, components and the complete machine which is expressed by the quality of impurity particles collected from specified parts by specified methods

3.3 maximum particle size

size (length × width) of the largest particles of hard impurities collected from parts, components and specified parts of the complete machine […]

......
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

TB/T 2247 · TB/T 2248

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Editions of JB/T 8415

Edition	Title	Revision	Status
JB/T 8415-2011	Internal combustion engines - Timing gears - Specifications	current edition	Current
JB/T 8415-1996	Internal combustion engines - Timing gears - Specifications	previous edition	Superseded

This page sells the current edition, JB/T 8415-2011. Earlier editions are listed for reference only.

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