ISO 6336-5:2016 PDF

Calculation of load capacity of spur and helical gears — Part 5: Strength and quality of materials

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Title (English):

ISO 6336-5:2016

Calculation of load capacity of spur and helical gears — Part 5: Strength and quality of materials

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 52
Publication date:: August 4, 2016
Edition:: ISO IS 6336 edition 3 version 1
ICS:: 21.200

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Description (English):

ISO 6336-5:2016 describes contact and tooth-root stresses and gives numerical values for both limit stress numbers. It specifies requirements for material quality and heat treatment and comments on their influences on both limit stress numbers. Values in accordance with ISO 6336-5:2016 are suitable for use with the calculation procedures provided in ISO 6336‑2, ISO 6336‑3 and ISO 6336‑6 and in the application standards for industrial, high-speed and marine gears. They are applicable to the calculation procedures given in ISO 10300 for rating the load capacity of bevel gears. ISO 6336-5:2016 is applicable to all gearing, basic rack profiles, profile dimensions, design, etc., covered by those standards. The results are in good agreement with other methods for the range indicated in the scope of ISO 6336‑1 and ISO 10300‑1.

Technical details

Technical committee: ISO/TC 60/SC 2 - Gear capacity calculation
SKU: ISO 6336-5:2016

Abstract

Overview

ISO 6336-5:2016 - "Calculation of load capacity of spur and helical gears - Part 5: Strength and quality of materials" defines how material strength and quality influence gear load capacity. The standard describes contact (pitting) and tooth-root (bending) stresses, provides numerical values for the allowable (limit) stress numbers, and specifies requirements for material quality and heat treatment. Values in ISO 6336-5:2016 are intended for use with the calculation methods in the ISO 6336 series and related application standards for industrial, high-speed and marine gears.

Key topics and technical requirements

Allowable stress numbers: Numerical limit values for contact and bending stresses and guidance on determining them for given materials and conditions.
Methods for determination: Two principal approaches are described:
- Method A - allowables derived from gear endurance tests matching the actual gear geometry and operating conditions.
- Method B - standard allowable stress numbers based on reference tests, pulsator and rolling-contact tests, and practical experience; includes quality classes ME, MQ and ML.
Material quality and heat treatment: Requirements, inspection and the influence of processes (carburizing, nitriding, through-hardening, shot peening, etc.) on allowable stresses and hardness depth.
Test and evaluation guidance: Recommendations on using gear and coupon tests, how to treat included process influences (e.g., lubrication, surface finish), and how to set influence factors when test data include certain effects.
Scope of materials: Covers the most widely used ferrous gear materials and associated heat treatments; provides tables, graphs and annexes (e.g., hardening depth, core hardness coefficients) to support calculation.
Conformance and limitations: Values are compatible with ISO 6336-2, -3, -6 and ISO 10300 procedures; results align with other methods within the scope of ISO 6336-1 and ISO 10300-1.

Practical applications and users

ISO 6336-5:2016 is used by:

Gear designers and mechanical engineers rating load capacity for spur and helical gears
Materials and heat-treatment engineers specifying process and inspection criteria
Quality and inspection teams applying material-quality classes (ME/MQ/ML)
Manufacturers of industrial, high-speed and marine gear systems
Engineers applying ISO 6336 calculation procedures and ISO 10300 bevel-gear ratings

Practical uses include selecting material/heat-treatment combinations, defining inspection and testing regimes, and providing input allowable stress numbers for pitting and bending calculations in gear design.

Related standards

ISO 6336 series: ISO 6336‑1, -2, -3, -6 (calculation framework for gear load capacity)
ISO 10300 (bevel gear rating)
Normative references used by ISO 6336‑5: ISO 642, ISO 643, ISO 683 series, ISO 2639 and other material/inspection standards.

Related standards

Standards mentioned in the description

Abstract

Overview

Key topics and technical requirements

Allowable stress numbers: Numerical limit values for contact and bending stresses and guidance on determining them for given materials and conditions.
Methods for determination: Two principal approaches are described:
- Method A - allowables derived from gear endurance tests matching the actual gear geometry and operating conditions.
- Method B - standard allowable stress numbers based on reference tests, pulsator and rolling-contact tests, and practical experience; includes quality classes ME, MQ and ML.
Material quality and heat treatment: Requirements, inspection and the influence of processes (carburizing, nitriding, through-hardening, shot peening, etc.) on allowable stresses and hardness depth.
Test and evaluation guidance: Recommendations on using gear and coupon tests, how to treat included process influences (e.g., lubrication, surface finish), and how to set influence factors when test data include certain effects.
Scope of materials: Covers the most widely used ferrous gear materials and associated heat treatments; provides tables, graphs and annexes (e.g., hardening depth, core hardness coefficients) to support calculation.
Conformance and limitations: Values are compatible with ISO 6336-2, -3, -6 and ISO 10300 procedures; results align with other methods within the scope of ISO 6336-1 and ISO 10300-1.

Practical applications and users

ISO 6336-5:2016 is used by:

Gear designers and mechanical engineers rating load capacity for spur and helical gears
Materials and heat-treatment engineers specifying process and inspection criteria
Quality and inspection teams applying material-quality classes (ME/MQ/ML)
Manufacturers of industrial, high-speed and marine gear systems
Engineers applying ISO 6336 calculation procedures and ISO 10300 bevel-gear ratings

Related standards

ISO 6336 series: ISO 6336‑1, -2, -3, -6 (calculation framework for gear load capacity)
ISO 10300 (bevel gear rating)
Normative references used by ISO 6336‑5: ISO 642, ISO 643, ISO 683 series, ISO 2639 and other material/inspection standards.

ISO 6336-5:2016 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Practical applications and users

Related standards

Related standards

Abstract

Overview

Key topics and technical requirements

Practical applications and users

Related standards

Related standards

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