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GB/T 24748-2023Reciprocating internal combustion engines—Flywheels—General specifications (English PDF)

往复式内燃机 飞轮 技术条件

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

August 6, 2023

Implementation date

March 1, 2024

Scope

GB/T 24748-2023 is the English-translated version of 往复式内燃机 飞轮 技术条件.

GB/T 24748-2023 is the Chinese standard "Reciprocating internal combustion engines—Flywheels—General specifications". Its scope clause reads: This document specifies the technical requirements, inspection methods, inspection rules, marking, packaging, transportation and storage of reciprocating internal combustion engine flywheels.

This document applies to reciprocating internal combustion engine flywheels (hereinafter referred to as flywheels) with a cylinder diameter of.200mm or less (inclusive). Its clauses include normative reference documents.

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Document preview — GB/T 24748-2023

National Standard of the People's Republic of China

ICS
27.020
Classification
J 92
Replacing
GB/T 24748-2009

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Contents

  • Preface
  • 1 Scope
  • 2 Normative reference documents
  • 3 Terms and Definitions
  • 4 Technical requirements
  • 4.1 General requirements
  • 4.2 Materials and metallographic structure
  • 4.3 Casting requirements
  • 4.4 Dimensional tolerance of processed parts
  • 4.5 Shape and position tolerances of processed parts
  • 4.6 Surface roughness of processed parts
  • 4.7 Flywheel mark
  • 4.8 Imbalance
  • 4.9 Reliability
  • 4.10 Overspeed test
  • 4.11 Cleanliness
  • 4.12 Appearance quality
  • 5 Inspection method
  • 5.1 Mechanical property test
  • 5.2 Hardness
  • 5.3 Metallographic structure
  • 5.4 Casting surface quality
  • 5.5 Coating quality
  • 5.6 Dimensional tolerance of processed parts
  • 5.7 Shape and position tolerances of processed parts
  • 5.8 Surface roughness
  • 5.9 Unbalance
  • 5.10 Reliability
  • 5.11 Overspeed test
  • 5.12 Cleanliness
  • 5.13 Appearance quality
  • 6 Inspection Rules
  • 6.1 Type inspection
  • 6.2 Factory inspection
  • 6.3 Spot inspection
  • 6.4 Sampling plan
  • 7 Marking, packaging, transportation and storage
  • 7.1 Flag
  • 7.2 Packaging
  • 7.3 Transport
  • 7.4 Storage

1 Scope

This document specifies the technical requirements, inspection methods, inspection rules, marking, packaging, transportation and storage of reciprocating internal combustion engine flywheels.

This document applies to reciprocating internal combustion engine flywheels (hereinafter referred to as flywheels) with a cylinder diameter of.200mm or less (inclusive).

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations

For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.

GB/T 197-2018 Ordinary thread tolerances

GB/T 1095-2003 Cross-sectional dimensions of flat keyway

GB/T 1184-1996 Shape and position tolerances No tolerance values noted

GB/T 1348-2019 Ductile iron castings

GB/T 1800.1-2020 Product Geometric Specification (GPS) Linear Dimensional Tolerance ISO Code System Part 1.Tolerances,

The basis of deviation and fit

GB/T 1804-2000 General tolerances Tolerances for linear and angular dimensions without tolerances noted

GB/T 1958 Product Geometric Specification (GPS) Geometric Tolerance Detection and Verification

GB/T 2828.1 Enumeration sampling inspection procedures Part 1.Batch-by-batch inspection sampling plan retrieved by acceptance quality limit (AQL)

GB/T 2829 Periodic inspection counting sampling procedures and tables (applicable to inspection of process stability)

GB/T 3177 Product Geometric Specification (GPS) Inspection of Smooth Workpiece Dimensions

GB/T 3821 Cleanliness limits and determination methods for small and medium power internal combustion engines

GB/T 6060.1-2018 Surface roughness comparison sample Part 1.Casting surface

GB/T 6060.2 Surface roughness comparison sample grinding, turning, boring, milling, inserting and planing surface

GB/T 6414-2017 Casting dimensional tolerances, geometric tolerances and machining allowances

GB/T 7216-2009 Metallographic examination of gray cast iron

GB/T 9239.1 Mechanical vibration constant (rigid) rotor balance quality requirements Part 1.Inspection of specifications and balance tolerances

GB/T 9439-2010 Gray iron castings

GB/T 9441-2021 Metallographic examination of ductile iron

GB/T 11351-2017 Casting weight tolerance

GB/T 30512 Requirements for banned substances in automobiles

JB/T 7945.1 Test methods for mechanical properties of gray cast iron Part 1.Tensile test

JB/T 9744 Magnetic particle testing of internal combustion engine parts and components

JB/T 11323 Reliability Assessment Method for Small and Medium Power Diesel Engines

QC/T 484-1999 Automobile paint coating […]

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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

Similar standards

GB/T 10398-2026|GB/T 10826.1-2025|GB/T 1147.1-2025|GB/T 1147.2-2025|GB/T 14096-2025|GB/T 45646-2025

Editions of GB/T 24748

EditionTitleRevisionStatus
GB/T 24748-2023Reciprocating internal combustion engines—Flywheels—General specificationscurrent editionCurrent
GB/T 24748-2009Reciprocating internal combustion engines—Flywheels—General specificationsprevious editionSuperseded

This page sells the current edition, GB/T 24748-2023. Earlier editions are listed for reference only.

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