Development Log
Recent Updates
Helical Gear Calculator and 3D STEP/STL/GLB export
Released the Helical Gear Calculator (ISO 21771 normal-system inputs, helix angle β, transverse geometry). 3D viewer and STEP/STL/GLB export are available for spur, helical, and planetary gearsets.
2026-07-27Fixed a bug in the spur gear meshing when gear 1 was odd number of teeth
Fixed a bug in the spur gear meshing when gear 1 was odd number of teeth, it was not taking into account the teeth on gear 2 when calculating the meshing.
2026-07-23Mobile Responsive Design
Added a mobile responsive design to the app.
2026-07-20Added Power, Torque and Force calculations to the spur gear report
Added Power, Torque and Force calculations to the spur gear report. Also added blank geometry inputs for the gear blank to introduce the future stress calculations and rating calculations.
2026-06-05Improved planetary gearset profile shift balancing
Fixed the profile shift balancing in the z3 = z1 + 2z2 condition for the planetary gearset.
2026-05-14Showing 1 to 5 of 13 results
Standards
- • DIN 780, Series I and II, Common Modules for fine and coarse modules.
- • ISO 53 Basic Rack Profile
- • ISO 54 Cylindrical gears for general engineering and for heavy engineering - Modules
- • ISO 21771 used for gear geometry calculations.
- • DIN 3967 backlash values for gears.
Added Features
- • Spur gear calculator to help design spur gearsets.
- • Helical gear calculator to help design helical gearsets.
- • Planetary gear calculator to help design planetary gearsets.
- • 3D viewer and CAD export options: STEP, STL, and GLB.
- • Common and preferred modules based on ISO 54 and DIN 780.
- • Expanding gear report with data.
- • Gear ratio calculations for basic geartrains.
- • Kinematics calculations for planetary gearsets.
- • Geartrains in cascading tabs.
- • Play pause and reset buttons for the animation.
- • Reverse button to reverse the animation.
- • Custom x,y grid system for positioning gears.
- • Backlash input for gears, referenced from AGMA, DIN and ISO.
- • Part number and description input for gears.
- • Profile shifts for adjusting the gears sizing.
- • Profile shift limits for avoiding undercutting and pointed tops.
- • Preferred number of teeth for span measurement.
- • Minimum and maximum number of teeth for span measurement.
- • Being able to select different driving gears for geartrains.
- • Inspection measurements for gears span.
- • Save your gears and gearsets with an account.
- • Share your gears and gearsets with others.
- • Embed your gears and gearsets in your website.
- • Engineering References section.
- • Base pitch table lookup tool to help narrow down the number of teeth to span (k) by pressure angle to then verify the base pitch.
- • Module to diametral pitch converter tool to help convert between module and diametral pitch.
Upcoming Improvements
- • Profile shift balancing for the planetary gearset when z3 does not equal z1 + 2z2 while maintaining the coaxiality condition.
- • Add in hob geometry factors for tip radius and clearance for profile shift limits.
- • Force and stress calculations added to gear report.
- • Gear report data can be exported to CSV or Excel.
- • Add in different basic rack geometries for hobbing manufacturing method.
- • Single tooth gear profile export
- • Export to additional CAD formats
- • User preferences and settings
- • Advanced gear report with more data.
- • Speed, ratio and torque calculations for gearsets.
- • Shaft and blank editor component.
Known Issues
- • when shrinking the window width, the animation speed play pause component is overlapping on the layout.