The type A27 air starter is generally used for starting internal combustion engines of an approximate range of ratings of 220 to 1100 kW (300 to 1500 HP), although the suitability depends, in practice, on the engine capacity, number of cylinders and the ratio of the driving pinion to the flywheel ring gear.

The A27 is usually supplied with pinion and flange and does not need external lubrication. It is lubrication free.

They are successfully used in: emergency generating sets, motor pumps, auxiliary ship engines, forklift or other industrial vehicles.