scope:

This part of ISO 10300 specifies the basic formulae for use in the determination of the surface load capacity of straight and helical (skew), Zerol and spiral bevel gears and hypoid gears, and includes all the influences on surface durability for which quantitative assessments can be made. This part of ISO 10300 is applicable to oil lubricated bevel gears, as long as sufficient lubricant is present in the mesh at all times. The formulae in ISO 10300 are based on virtual cylindrical gears and restricted to bevel gears whose virtual cylindrical gears have transverse contact ratios of åvá < 2. The results are valid within the range of the applied factors as indicated in ISO 10300-1, and in ISO 6336-2. The formulae in this part of ISO 10300 are not directly applicable in the assessment of other types of gear tooth surface damage, such as plastic yielding, scratching, scuffing or any other type not specified. WARNING: The user is cautioned that when the methods are used for large average mean spiral angles (âm1+âm2)/2 > 45°, large effective pressure angles áe > 30° and for large face widths b > 13 mmn, the calculated results of ISO 10300 should be confirmed by experience.