Worm Face gear
Version 06.27.2022
Worm face gear is similar to High Ratio Hypoid but with involute helical worm pinion. Pressure angle on the drive and coast side is often different. 10/30 degrees pressure angle design has been dominating under trade name Spiroid of ITW in the US. This gear design is also known as SPIRSIN in Spain. The worm pinion can be cylindrical or tapered. Tapered worm can be used for zero-backlash adjustment by advancing the worm along its axis.
Excel interface
Cylindrical worm
Tapered worm
More teeth in the mesh for higher torque and smooth drive
More compact compared to worm gears
Involute tapered worm thread for easy machining
Worm Face gear program description
No experience needed. Because the interface is in Excel it is easy to customize for different projects and languages. Add formulas, diagrams, tables and other Excel options. No installation needed. Allow Macros when open the program for the first time. Compatible with any CAD/CAM software. Unlimited licence. One year free support. Download PDF tutorial.
This program generates the gear tooth only. The worm tooth is better to generate using CAD tools. Download PDF tutorial how to generate involute worm in SolidWorks. Excel file for 3d worm tooth generation is also available.