For wide-face helical gears, what is the recommended range for the helix angle?

The recommended range for the helix angle in wide-face helical gears is typically less than 15 degrees. This is because lower helix angles reduce the axial loads acting on the bearings, which helps in minimizing thrust and increasing the load-carrying capacity of the gear system. A helix angle of less than 15 degrees also decreases the likelihood of interference and allows for smoother operation, leading to better contact between the gear teeth.

Higher helix angles improve the engagement and V-velocity components significantly, but also introduce greater axial forces, which can result in increased wear and potential failure if not properly accounted for in the design. Therefore, keeping the helix angle below 15 degrees strikes a balance between performance and durability in wide-face helical gears.