Gear tooth-root load factor, K_F,tot — ISO 6336-3

Total load factor σ_F/σ_F0 = K_A·K_v·K_Fα·K_Fβ used in the ISO 6336-3 tooth-root bending strength calculation.

✓ validated against legacyoriginal: /calculators/kf.htm

Application factor, K_ADynamic factor, K_vTransverse load distribution factor, K_FαFace load distribution factor, K_Fβ

Total load factor, σ_F/σ_F0 = K_A·K_v·K_Fα·K_Fβ (legacy output field named "Kh_tot")2.54

Method & references

ISO 6336-3: Calculation of load capacity of spur and helical gears — tooth-root strength load factors.

The computation is a literal port of the original client-side JavaScript from /calculators/kf.htm. Results are verified equal to the original by an automated golden-master test. No formula has been re-derived or “improved”.

Gear tooth-root load factor, K_F,tot — ISO 6336-3 — Engineering ABC