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PD ISO/TS 6336-20:2022 Calculation of load capacity of spur and helical gears - Calculation of scuffing load capacity. Flash temperature method, 2022
- National foreword
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions [Go to Page]
- 3.1 Terms and definitions
- 3.2 Symbols and units
- 4 Scuffing and wear [Go to Page]
- 4.1 Occurrence of scuffing and wear
- 4.2 Transition diagram
- 4.3 Friction at incipient scuffing
- 5 Basic formulae [Go to Page]
- 5.1 Contact temperature
- 5.2 Flash temperature formula
- 5.3 Transverse unit load
- 5.4 Distribution of overall bulk temperatures
- 5.5 Rough approximation of a bulk temperature
- 6 Coefficient of friction [Go to Page]
- 6.1 General
- 6.2 Mean coefficient of friction, method A
- 6.3 Mean coefficient of friction, method B
- 6.4 Mean coefficient of friction, method C
- 7 Parameter on the line of action
- 8 Approach factor
- 9 Load sharing factor, XΓ [Go to Page]
- 9.1 General
- 9.2 Spur gears with unmodified profiles
- 9.3 Spur gears with profile modification
- 9.4 Buttressing factor, Xbut,Γ
- 9.5 Helical gears with εβ ≤ 0,8 and unmodified profiles
- 9.6 Helical gears with εβ ≤ 0,8 and profile modification
- 9.7 Helical gears with εβ ≥ 1,2 and unmodified profiles
- 9.8 Helical gears with εβ ≥ 1,2 and profile modification
- 9.9 Helical gears with 0,8 < εβ < 1,2
- 10 Scuffing temperature and safety [Go to Page]
- 10.1 Scuffing temperature
- 10.2 Structural factor
- 10.3 Contact exposure time
- 10.4 Scuffing temperature in gear tests
- 10.5 Safety range
- Annex A (informative) Flash temperature formula presentation
- Annex B (informative) Optimal profile modification
- Bibliography [Go to Page]
