This is an Ingersoll-Rand, 226mm, Angular Contact bearing style airend used in SSR500H thru 800L units. Note that this airend has an oil pump.

This is an Ingersoll-Rand, 226mm, Angular Contact bearing style airend used in SSR500H thru 800L units. Note that this airend has an oil pump. Some of these airends have been retrofitted by Ingersoll-Rand to accept Tapered Roller bearings.