Worm Gear Drive

indicative

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.

Worm gear drive

Estimate ratio, efficiency, contact stress and axial load for a worm-and-wheel set.

Recommended for beam: ASTM A992 (W-shapes) — Highest strength/weight ratio among common W-shape grades

Yield strength (Fy)

Power

Worm speed (rpm)Worm starts (threads)Wheel teeth

Module

Face width

Friction coefficientLead angle (°)

Continue workflow

Typical next steps after Worm Gear Drive

Design help & referenceShow

Reference documentation

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

Candidate strategy

Typical Auto-design directions for worm gear drive.

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