ISO 6336

Preliminary cylindrical gear load rating to ISO 6336

Estimate contact and tooth-root stress for an external spur or helical gear pair from geometry, torque and explicit ISO 6336 factors.

Use this for early selection of module, facewidth and allowable material stresses. Factors remain visible so their source in charts, tables or material data is traceable.

ISO6336

Inputs

Normal module mₙ (mm)Pinion tooth count z₁ (–)Wheel tooth count z₂ (–)Normal pressure angle αₙ (°)Helix angle β (°)Facewidth b (mm)Pinion torque T₁ (N·m)Allowable contact stress σHP (MPa)Allowable tooth-root stress σFP (MPa)

Norm factors and advanced inputs

Application factor K_A (–)Dynamic factor K_V (–)Contact face factor K_Hβ (–)Root face factor K_Fβ (–)Zone factor Z_H (–)Elastic coefficient Z_E (MPa⁰·⁵)Contact ratio factor Zε (–)Pinion tooth form factor YF₁ (–)Wheel tooth form factor YF₂ (–)Stress correction factor YS (–)

Results

Enter torque, geometry and factors.

Model

Transparent preliminary model

All main influencing quantities are shown as inputs or intermediate results. Check factors, material data and boundary conditions against the complete standard.

Standard basis

ISO 6336

The local standards provide terminology and series values. This tool deliberately identifies its simplified scope and does not claim conformity.

Use

Before detailed design

Use the result as a starting point for selection and plausibility; then verify manufacturer data, load spectra and safety requirements.