Helical Gears

Helical gears are cylindrical disks which have involute-shaped teeth cut into their face at a helix angle. By slanting the teeth, helical gears can obtain a large contact ratio and the gradual change to the contact surface load which give helical gears their characteristic of smooth transmission of rotation. Compared to spur gears, helical gears generate less vibration and noise and perform better in high-speed rotation and high-load applications. KHK has released two new categories of helical gears—Ground Helical gears that use a transverse module and can be used as replacements or spur gears without the need to change the gear train, and SH helical gears that feature larger contact ratios compared to standard spur gears.