Operation of worm gears requires unique lubrication demands. The
operation of worm gears is sideway sliding motion, hydrodynamic
wedge is impossible to maintain, so worm gear will operate under
boundary lubrication conditions.
a) The chief considerations are that lubricants must have
high-temperature tolerance like oils with an ISO VG of 460 (AGMA
Class 7) and higher as the working temperature may reach as high as
88-degree Celsius or higher. the lubricant must have good thermal
and oxidative stability and viscosity.
b) types of gear oils:
1. compounded gear oils
2. extreme pressure gear oils
3. synthetic worm gear oils.
