These are right angle drive designed with high efficiency, quiet
operation, and long service life. They comprise of single and double
projecting output shafts for application flexibility. An integrated tooth contact analysis computer program for the stimulation of meshing and contact of gear drives that calculates transmission errors and shift of hearing contact for misalign gear drives has been developed. This is an appropriate example of spiral bevel gear drive.
They can be used either to reduce or increase speed. These gear drives are important components on all current rotorcraft drive systems. This system is required to operate at high speeds, high loads, and for an extremely large number of load cycles. They are widely used in material handling, packaging machinery, agriculture machines, and textile machinery.