Epicyclic gears get their name from their earliest software, which was the modelling of the movements of the planets in the heavens. Believing the planets, as everything in the heavens, to end up being perfect, they could just travel in perfect circles, but their motions as seen from Earth cannot be reconciled with circular movement. At around 500 BC, the Greeks invented the thought of epicycles, of circles venturing 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 improve 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 choice, is not just another simple planetary gearbox. EP high-tech planetary reducer can be a genuine integrated concept, including countless functions combined together to give a complete sub-assembly to the most demanding machines.
EP is the best high-tech servo-reducer, specially dedicated to designs requiring:
Superior output torsional stiffness
Ultra-excessive output radial stiffness and Tilting moment
Patented output bearing design
A high-tech planetary equipment 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 exceptional torque density
Minimum backlash (1 – 3 arc-minutes)
In-Line or correct angle arrangements
This versatile design makes it easy for design engineers to find exact solutions to the most demanding applications.
Parallel shaft Gearmotors
Helical Single-Stage
The S Series design may make this gearmotor particularly effective for pump, fan and blower applications. To meet 
up the needs of clients in these sectors, the S Series is also available in the feet or flange variations and will be completed with a wide range of electric motors entirely created by EP. Planetary Reducer Gearbox Asynchronous motors both IEC and small (B-BE-BX/M-ME-MX), servomotors (BMD) and reluctance motors (BSR) can be coupled with the S Series: with the breadth of its portfolio, EP provides consumers with an outstanding balance of cost performance, efficiency and dynamics.
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 gear is generally fixed and sunlight gear is driven.