Cycloidal vs Involute Gear Calculator | Mechanical Kinematics Guide

Should you use cycloidal or involute gears for your project? While cycloidal teeth are traditionally found in mechanical clocks and high-reduction cycloidal robotic drives, involute gears are the universal standard for CNC, laser cutting, 3D printing, and automotive gearing due to center-distance tolerance.

Key Features

• Calculates true involute profiles with center-distance tolerance compensation
• Explains kinematics: line of action, pressure angles, and sliding vs rolling contact
• Demonstrates why involute gears tolerate center distance variations without jamming
• Interactive 2D simulation comparing velocity ratios and tooth engagement
• Instant production DXF and SVG export for involute spur, rack, and ring gears
• Free online tool trusted by engineers, clockmakers, and robotics builders

Frequently Asked Questions

Why are involute gears preferred over cycloidal gears in modern engineering?

Involute gears maintain a strictly constant velocity ratio even if the shaft center distance shifts slightly due to machining tolerances or bearing wear. Cycloidal gears require exact center distances.

When are cycloidal teeth still used today?

Cycloidal gears are still used in traditional mechanical wristwatches (where friction is lower at small tooth counts) and high-ratio zero-backlash cycloidal speed reducers in robotics.

Can I cut functional clock gears with GearDXF?

Yes! GearDXF's precision involute profiles with generous root clearances and backlash adjustments run smoothly in wooden and brass clock trains with lower friction than poorly-cut cycloidal teeth.