ISO 10300-3:2014
Calculation of load capacity of bevel gears — Part 3: Calculation of tooth root strength
ISO 10300-3:2014 specifies the fundamental formulae for use in the tooth root stress calculation of straight and helical (skew), Zerol and spiral bevel gears including hypoid gears, with a minimum rim thickness under the root of 3,5 mmn. All load influences on tooth root stress are included, insofar as they are the result of load transmitted by the gearing and able to be evaluated quantitatively. Stresses, such as those caused by the shrink fitting of gear rims, which are superposed on stresses due to tooth loading, are intended to be considered in the calculation of the tooth root stress, σF, or the permissible tooth root stress σFP. ISO 10300-3:2014 is not applicable in the assessment of the so-called flank breakage, a tooth internal fatigue fracture (TIFF).
The formulae in ISO 10300-3:2014 are based on virtual cylindrical gears and restricted to bevel gears whose virtual cylindrical gears have transverse contact ratios of Ɛvα < 2. The results are valid within the range of the applied factors as specified in ISO 10300-1 (see also ISO 6336-3). Additionally, the given relationships are valid for bevel gears, of which the sum of profile shift coefficients of pinion and wheel is zero (see ISO 23509).
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Section sec_1
Section sec_2
Section sec_3
Section sec_3.1
Section sec_3.2
Section sec_3.3
Section sec_3.4
Section sec_3.5
Section sec_3.6
Section sec_4
Section sec_5
Section sec_6
Section sec_6.1
Section sec_6.2
Section sec_6.3
Section sec_6.4
Section sec_6.4.1
Section sec_6.4.1.1
Figure fig_1
Section sec_6.4.1.2
Section sec_6.4.1.2.1
Section sec_6.4.1.2.2
Section sec_6.4.1.2.3
Section sec_6.4.1.2.4
Section sec_6.4.1.2.5
Section sec_6.4.1.3
Figure fig_2
Section sec_6.4.2
Section sec_6.4.3
Section sec_6.4.4
Figure fig_3
Section sec_6.4.5
Section sec_6.5
Section sec_6.5.1
Table tab_f
Figure fig_4
Section sec_6.5.2
Table tab_1
Table tab_h
Figure fig_5
Section sec_7
Section sec_7.1
Section sec_7.2
Section sec_7.3
Section sec_7.4
Section sec_7.4.1
Section sec_7.4.2
Section sec_7.4.3
Figure fig_6
Section sec_7.4.4
Section sec_7.4.4.1
Section sec_7.4.4.2
Section sec_7.4.4.3
Section sec_7.4.4.4
Section sec_7.4.5
Section sec_7.4.5.1
Section sec_7.4.5.2
Section sec_7.4.5.3
Section sec_7.4.5.4
Section sec_7.4.5.5
Section sec_7.4.6
Section sec_7.4.6.1
Section sec_7.4.6.2
Section sec_7.4.6.3
Section sec_7.4.6.4
Section sec_7.4.7
Section sec_7.5
Section sec_7.5.1
Section sec_7.5.2
Section sec_8
Section sec_8.1
Section sec_8.1.1
Table tab_m
Figure fig_7
Section sec_8.1.2
Section sec_8.1.2.1
Section sec_8.1.2.2
Section sec_8.1.2.3
Section sec_8.2
Section sec_8.2.1
Section sec_8.2.2
Section sec_8.2.3
Section sec_8.2.3.1
Section sec_8.2.3.2
Section sec_8.2.3.3
Table tab_n
Figure fig_8
Table tab_2
Reference ref_1
Reference ref_2
Reference ref_3
Reference ref_4
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols, units and abbreviated terms
5 General rating procedure
6 Gear tooth rating formulae — Method B1
6.1 Tooth root stress formula
6.2 Permissible tooth root stress
6.3 Calculated safety factor
6.4 Tooth root stress factors
6.5 Permissible tooth root stress factors
7 Gear tooth rating formulae — Method B2
7.1 Tooth root stress formula
7.2 Permissible tooth root stress
7.3 Calculated safety factor
7.4 Tooth root stress factors
7.5 Permissible tooth root stress factors
8 Factors for permissible tooth root stress common for method B1 and method B2
8.1 Size factor, YX
8.2 Life factor, YNT
Bibliography
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Section sec_1
Section sec_2
Section sec_3
Section sec_3.1
Section sec_3.2
Section sec_3.3
Section sec_3.4
Section sec_3.5
Section sec_3.6
Section sec_4
Section sec_5
Section sec_6
Section sec_6.1
Section sec_6.2
Section sec_6.3
Section sec_6.4
Section sec_6.4.1
Section sec_6.4.1.1
Figure fig_1
Section sec_6.4.1.2
Section sec_6.4.1.2.1
Section sec_6.4.1.2.2
Section sec_6.4.1.2.3
Section sec_6.4.1.2.4
Section sec_6.4.1.2.5
Section sec_6.4.1.3
Figure fig_2
Section sec_6.4.2
Section sec_6.4.3
Section sec_6.4.4
Figure fig_3
Section sec_6.4.5
Section sec_6.5
Section sec_6.5.1
Table tab_f
Figure fig_4
Section sec_6.5.2
Table tab_1
Table tab_h
Figure fig_5
Section sec_7
Section sec_7.1
Section sec_7.2
Section sec_7.3
Section sec_7.4
Section sec_7.4.1
Section sec_7.4.2
Section sec_7.4.3
Figure fig_6
Section sec_7.4.4
Section sec_7.4.4.1
Section sec_7.4.4.2
Section sec_7.4.4.3
Section sec_7.4.4.4
Section sec_7.4.5
Section sec_7.4.5.1
Section sec_7.4.5.2
Section sec_7.4.5.3
Section sec_7.4.5.4
Section sec_7.4.5.5
Section sec_7.4.6
Section sec_7.4.6.1
Section sec_7.4.6.2
Section sec_7.4.6.3
Section sec_7.4.6.4
Section sec_7.4.7
Section sec_7.5
Section sec_7.5.1
Section sec_7.5.2
Section sec_8
Section sec_8.1
Section sec_8.1.1
Table tab_m
Figure fig_7
Section sec_8.1.2
Section sec_8.1.2.1
Section sec_8.1.2.2
Section sec_8.1.2.3
Section sec_8.2
Section sec_8.2.1
Section sec_8.2.2
Section sec_8.2.3
Section sec_8.2.3.1
Section sec_8.2.3.2
Section sec_8.2.3.3
Table tab_n
Figure fig_8
Table tab_2
Reference ref_1
Reference ref_2
Reference ref_3
Reference ref_4
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols, units and abbreviated terms
5 General rating procedure
6 Gear tooth rating formulae — Method B1
6.1 Tooth root stress formula
6.2 Permissible tooth root stress
6.3 Calculated safety factor
6.4 Tooth root stress factors
6.5 Permissible tooth root stress factors
7 Gear tooth rating formulae — Method B2
7.1 Tooth root stress formula
7.2 Permissible tooth root stress
7.3 Calculated safety factor
7.4 Tooth root stress factors
7.5 Permissible tooth root stress factors
8 Factors for permissible tooth root stress common for method B1 and method B2
8.1 Size factor, YX
8.2 Life factor, YNT
Bibliography