RedMax Power Equipment Glossary

cc	Cubic Centimeters - a standard measure of volume.
cfm	Cubic Feet per Minute - in the case of blowers, a measurement of the volume of air moved by the tool. Higher means more air.
chain brake	For chain saws, a safety feature which stops the chain in certain circumstances.
coupling	Something that joins or connects two things.
diaphragm carburetor	A type of carburetor designed not to rely upon gravity, allowing an engine to operate in any position - such as upside down.
displacement	The volume of fuel displaced by one stroke of a piston within the cylinder of an internal combustion engine - important as a gauge of the power of the engine although many factors affect the power and efficiency of the tool as a whole.
dry weight	Weight without fuel or other fluids.
fps	Feet Per Second. A measurement of unidirectional speed.
purge pump	A device to remove excess air from the carburetor.
reciprocate	To move back and forth.
reduction ratio	A indication of a mechanical advantage. A higher number will result in greater torque.
splined	Having projections on a shaft that fit into slots on a corresponding shaft, enabling both to rotate together.
torque	A turning or twisting force.