About LatheGearPro

LatheGearPro helps machinists calculate change gear arrangements for cutting threads on lathes. Find the right gear combinations when standard arrangements are unavailable or when working with non-standard thread pitches.

Features

• Calculates all valid gear combinations for any thread pitch
• Supports both imperial (TPI) and metric (mm pitch) threads
• Handles cross-system conversions (metric threads on imperial lathes and vice versa)
• Configurable error tolerance for approximate matching
• Save and switch between multiple lathe profiles
• Adjustable calculation depth (1 to 4 gear pairs)
• Results sorted by accuracy and number of gears
• Works completely offline — no data collection

Privacy

All gear calculations are performed locally on your device. The app uses Firebase (by Google) for crash reporting and anonymous usage analytics to help improve stability. No gear data, thread settings, or lathe profiles are ever transmitted off your device.

View the full Privacy Policy

Contact

For questions, feedback, or support, please get in touch at [email protected].