BS ISO 6336-3:2019 - Calculation of load capacity of spur and helical gears. Calculation of tooth bending strength

BS ISO 6336-3:2019

Calculation of load capacity of spur and helical gears. Calculation of tooth bending strength

Status : Current   Published : November 2019

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PDF

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HARDCOPY



This document specifies the fundamental formulae for use in tooth bending stress calculations for involute external or internal spur and helical gears with a rim thickness sR > 0,5 ht for external gears and sR > 1,75 mn for internal gears. In service, internal gears can experience failure modes other than tooth bending fatigue, i.e. fractures starting at the root diameter and progressing radially outward. This document does not provide adequate safety against failure modes other than tooth bending fatigue. All load influences on the tooth root stress are included in so far as they are the result of loads transmitted by the gears and in so far as they can be evaluated quantitatively.

This document includes procedures based on testing and theoretical studies such as those of Hirt[11], Strasser[14] and Brossmann[10]. The results are in good agreement with other methods (References [5], [6], [7] and [12]). The given formulae are valid for spur and helical gears with tooth profiles in accordance with the basic rack standardized in ISO 53. They can also be used for teeth conjugate to other basic racks if the virtual contact ratio ??n is less than 2,5.

The load capacity determined on the basis of permissible bending stress is termed “tooth bending strength”. The results are in good agreement with other methods for the range, as indicated in the scope of ISO 6336-1.

If this scope does not apply, refer to ISO 6336-1:2019, Clause 4.




Standard NumberBS ISO 6336-3:2019
TitleCalculation of load capacity of spur and helical gears. Calculation of tooth bending strength
StatusCurrent
Publication Date28 November 2019
Normative References(Required to achieve compliance to this standard)ISO 4287:1997, ISO 4287:1997/Amd 1:2009, ISO 4287:1997/COR 1:1998, ISO 4288:1996, ISO 4287:1997/Cor 2:2005, ISO 6336-1, ISO 6336-5, ISO 53:1998, ISO 1122-1:1998 (R09)
Informative References(Provided for Information)VDI 2737, DIN 3990 (all parts), ISO/TR 10064-4, VDI 2226, TGL 10545:1963, ISO 1328-1:2013, ISO 701:1998 (R08), ISO 54:1996
International RelationshipsISO 6336-3:2019
Draft Superseded By18/30377016 DC
DescriptorsMechanical transmission systems, Gear parameters, Mathematical calculations, Load capacity, Strength of materials, Formulae (mathematics), Helical gears, Error correction, Design calculations, Gear drives, Thickness, Stress analysis, Spur gears
ICS21.200
Title in FrenchCalcul de la capacité de charge des engrenages cylindriques à dentures droite et hélicoïdale Calcul de la tenue en fatigue à la flexion en pied de dent
CommitteeMCE/5/-/6
ISBN978 0 539 00806 7
PublisherBSI
FormatA4
DeliveryYes
Pages66
File Size2.468 MB
Price£254.00


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