A Torq/Lite® pneumatic torque wrench consist of a robust air motor driving a multiplier with three or more stages of epicyclic gearing.

Torque control is achieved by adjustment of the air pressure. An air pressure versus torque graph and a calibration certifi cate is supplied with each tool and allows specifi c torque values to be set. For more critical applications, Pneumatic wrenches can be fi tted with a torque transducer and the precise torque output displayed. The tool can then be shut off at the desired torque either manually or automatically using suitable control circuitry.

Pneumatic torque wrenches are suitable for tightening and untightening bolts of up to six inches in diameter. The following is just a small selection of applications:

	Wheel nuts on trucks, buses and large machinery
	Structural steelwork
	High pressure joints such as, pipelines, boiler feed pumps and pressure vessels
	Engine head bolts
	Injector heads on plastic injection moulding machines
	Heat exchangers
	Heavy vehicle production such as chassis and suspension bolts

Whenever a high continuous torque is needed, use pneumatic torque wrenches as the power source. Typical applications include:

	Ball valve operation
	Power wagons and gantries
	Barring (turning the crankshaft) of large diesel engines during build
	Weld testing by applying test torques
	Roller adjustment in steel mills and paper mills
	Valving of gas bottles