Epicyclic gears obtain name from their earliest app, which was the modelling of the actions of the planets in the heavens. Believing the planets, as everything in the heavens, to be perfect, they could only travel in ideal circles, but their motions as viewed from Earth cannot end up being reconciled with circular motion. At around 500 BC, the Greeks created the 
idea of epicycles, of circles traveling on the circular orbits. With this theory Claudius Ptolemy in the Almagest in 148 AD was able to predict planetary orbital paths. The Antikythera Mechanism, circa 80 BC, had gearing which was in a position to approximate the moon’s elliptical path through the heavens, and even to correct for the nine-year precession of that route.[3] (The Greeks could have seen it much less elliptical, but instead as epicyclic motion.)
EP, a versatile and multi-use solution, is not only another simple planetary gearbox. EP high-tech planetary reducer can be a genuine integrated concept, including many functions combined along to give you a complete sub-assembly to the virtually all demanding machines.
EP is the best high-tech servo-reducer, specially focused on designs requiring:
Superior output torsional stiffness
Ultra-huge output radial stiffness and Tilting moment
Patented output bearing design
A high-tech planetary gear train, predicated on REDEX’s differential know-how
ISO 9409-1 end result drive flange for mounting pinions, pulleys, couplings, etc.
High input speeds
Superior acceleration and remarkable torque density
Minimum backlash (1 – 3 arc-minutes)
In-Line or proper angle arrangements
This versatile design makes it possible for design engineers to find actual solutions to the most demanding applications.
Parallel shaft Gearmotors
Helical Single-Stage
The S Planetary Reducer Gearbox Series design may make this gearmotor particularly effective for pump, fan and blower applications. To meet up the needs of consumers in these sectors, the S Series is also available in the foot or flange types and will be completed with a wide variety of electric motors entirely created by EP. Asynchronous motors both IEC and compact (B-BE-BX/M-ME-MX), servomotors (BMD) and reluctance motors (BSR) could be coupled with the S Series: with the breadth of its portfolio, EP provides buyers with a superb balance of dynamics, effectiveness and cost effectiveness.
The combination of epicycle gear trains with a planet engaging both a sun gear and a ring gear is called a planetary gear train.[1][2] In this case, the ring equipment is normally fixed and the sun gear is driven.