Spur Gear Design

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Design standard

Calculation standard

Sets screening knobs for Indicative practice — not product type or catalog geometry

Handbook screening factors for shafts, gears, and rotating parts. Geometry and catalog type stay free.

Target SF 2.00Service factor 1.25

Reference standards

Machinery's HandbookShigley's Mechanical Engineering Design

Validate — verify what you entered

Auto-design runs a solver-backed sizing search, applies the best candidate, then runs the full validation check.

Gear design

Enter operating power, geometry, and material properties for spur gear design.

Power

Speed (rpm)

Pinion teeth

Gear ratio

Module

Face width

Material

Application, dynamic, and face load factors for pitting and bending worksheets (US/EU/ISO design codes).

Application factor K_A

Face load factor K_Hβ

Quality grade Q_v

Lubrication

Scuffing screening (ISO 6336-20 indicative)Micropitting screening (ISO 6336-22 indicative)

Continue workflow

Typical next steps after Gear Design

Design help & referenceShow

Reference documentation

Standards, catalogs, and technical write-ups relevant to this module.

Candidate strategy

Typical Auto-design directions for gear design.

Option	Basis	Pass	Tradeoff
Minimum size	Static strength	Screen fatigue	Compact but sensitive
Recommended size	Strength + stiffness	Pass expected	Balanced
Robust size	High reserve	Pass with margin	Larger and heavier