Industrial Gear Oil

Oils for enclosed industrial gear drives on crushers, conveyors, mixers and mill drives, in the heavier viscosity grades those drives run.

Features

Viscosity is chosen from the gear's pitch line velocity and operating temperature rather than from the size of the gearbox.
Micro-pitting performance matters on case-hardened gears under high load, and it is not implied by the extreme-pressure rating.
Synthetic grades extend drain intervals and improve cold starting on outdoor drives, at a higher first cost.
Water contamination is common on outdoor drives, so water separation and rust protection are practical selection criteria.
Sampling on a fixed schedule is the only way to manage a sealed drive that nobody opens between overhauls.

Figure	Typical range	Unit	Why it matters
Viscosity grade at 40 degrees C	150 / 220 / 320 / 460	mm2/s	the primary selection figure for enclosed drives
Base oil	mineral / synthetic		drain interval and cold-start behaviour
Micro-pitting performance	high load stage rating		protects case-hardened teeth under high contact stress
Fill volume	25 - 600	l	large drives make a change a planned operation
Operating temperature	60 - 95	degrees C	the temperature the grade has to be right at