3rd member talk (ring&pinion setup etc.)

[NoHachi]

Quote:20.1.3 Forced-Circulation Lubrication
Forced-circulation lubrication applies lubricant to the contact portion of the teeth by means of an oil pump. There are drop, spray and oil mist methods of application.
1. Drop method:
An oil pump is used to suck-up the lubricant and then directly drop it on the contact portion of the gears via a delivery pipe.
2. Spray method:
An oil pump is used to spray the lubricant directly on the contact area of the gears.
3. Oil mist method:
Lubricant is mixed with compressed air to form an oil mist that is sprayed against the contact region of the gears. It is especially suitable for high-speed gearing.
Oil tank, pump, filter, piping and other devices are needed in the forced-lubrication system. Therefore, it is used only for special high-speed or large gear box applications. By filtering and cooling the circulating lubricant, the right viscosity and cleanliness can be maintained. This is considered to be the best way to lubricate gears.

Sounds like the above to me. Needed above 12m/s tangential speed.