Cogsmith Parametric Gear Generator

Cogsmith is a parametric gear design tool built for real-world fabrication workflows, from professional prototyping and mechanical projects to laser-cut DIY mechanisms.

Instead of drawing complex tooth profiles manually, define key parameters such as tooth count, module, pressure angle, profile shift, material thickness, and center distance. Cogsmith generates the gear geometry and keeps 2D design, 3D validation, and manufacturing output connected in one workflow.

Parametric Gear Design
Create gears using tooth count, Module / DP, pressure angle, profile shift, tooth thickness, center distance, and other engineering parameters. Cogsmith supports external gears, internal ring gears, racks, sector gears, as well as multi-stage, compound, and planetary gear arrangements.

2D Engineering Workspace
Inspect precise gear outlines together with pitch circles, root geometry, dimensions, and assembly positions. Geometry updates directly from the parameter model, making the 2D view suitable for fabrication planning and dimensional verification.

Real-Time 3D Preview & Meshing Motion
Preview the generated gears with physical material thickness in an interactive 3D environment. Rotate, zoom, switch between perspective and orthographic views, and animate meshing gear trains to verify motion before fabrication. Material previews such as wood, acrylic, and brass help communicate how a design may look as a finished part.

3D is used for visualization and assembly validation. Manufacturing exports are provided as SVG and DXF.

Bores & Gear Body Customization
Configure common shaft interfaces including round, D-shaped, hexagonal, and square bores, together with gear-body cutouts and weight-reduction features for mechanical, robotics, and maker applications.

Gear Trains & Mechanism Design
Go beyond individual gears by building multi-gear mechanisms. Inspect center distances, ratios, rotation direction, and meshing relationships before committing material to a cut.

Manufacturing-Aware Preflight
Before export, Cogsmith checks for potential problems such as undercutting, thin tooth tips, insufficient meshing conditions, bore intrusion, structural conflicts, and selected gear interference conditions, with actionable feedback for correcting the design.

Built for Cutting & Engraving
Configure material thickness, kerf compensation, fit clearance, sheet dimensions, and part layout to bridge the gap between gear geometry and real fabrication.

SVG & DXF Export
Once a design passes review, export accurate SVG or DXF geometry for laser cutting, CNC cutting, and other 2D fabrication workflows.

Ideal for

• Laser-cut plywood and acrylic gears
• CNC and mechanical prototyping
• Robotics and automation mechanisms
• Reduction gear trains and multi-stage drives
• Planetary gear mechanisms
• Mechanical teaching models
• Kinetic and interactive projects
• DIY and maker builds
• Rapid replacement-gear prototyping

Cogsmith keeps the complex geometry in the background so designers can focus on what matters: building, validating, and making mechanisms that move.

Design. Mesh. Make.