ETAGEAR a professional gear design software. It can calculate cylindrical gear pair with parallel axes, NGW planetary gear train, pinion with rack, worm, worm with helical gear, straight bevel gear, helical bevel gear, Gleason spiral bevel gear, equal pitch bevel gear, involute spline and one tooth difference cycloidal gear. You can convert between modification coefficient, base tangent length, and even measurement with pins in common tools. The 3D module can conveniently build 3D modeling and a