Gear Pair

Tooth contact (pitting) and bending safety of an external gear pair (teaching model).

Input Parameters

Gear type

Normal module mₙ

Pinion teeth z₁

—

Gear teeth z₂

—

Face width b

Normal pressure angle αₙ

Contact fatigue limit σ_Hlim

MPa

Bending fatigue limit σ_Flim

MPa

Pinion speed n₁

rpm

Power P

Application factor K_A

—

Dynamic factor K_v

—

Face-load factor K_Hβ

—

Face-load factor K_Fβ

—

Service & lubrication

Operating life L_h

Lubricant ν₄₀ at 40°C

mm²/s

Surface roughness R_z

μm

Scuffing friction μ

—

Limiting flash temp Θ_S

Oil sump temp Tₒᵢₗ

Spur gear: helix angle β = 0° (no axial force).