Epicyclic gears get their name from their earliest application, that was the modelling of the motions 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 become reconciled with circular movement. At around 500 BC, the Greeks developed the idea 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, acquired gearing which was able to approximate the moon’s elliptical route through the heavens, and even to improve for the nine-calendar year precession of that route.[3] (The Greeks could have seen it not as elliptical, but instead as epicyclic motion.)
EP, a versatile and multi-use alternative, is not just another simple planetary gearbox. EP high-tech planetary reducer is normally a true integrated concept, including many functions combined together to provide a complete sub-assembly to the virtually all demanding machines.
EP is the best high-tech servo-reducer, specially dedicated to designs requiring:
Superior output torsional stiffness
Ultra-high 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 result drive flange for installation pinions, pulleys, couplings, etc.
High input speeds
Superior acceleration and superb torque density
Minimum backlash (1 – 3 arc-minutes)
In-Line or proper angle arrangements
This versatile design makes it easy for design engineers to find specific solutions to the most demanding applications.
Parallel shaft Gearmotors
Helical Single-Stage
The 
S Series style may make this gearmotor particularly effective for blower applications, pump and fan. To meet up the needs of buyers in these sectors, the S Series can be available in the feet or flange editions and can be completed with a wide selection of electric motors entirely produced by EP. Asynchronous motors both IEC and small (B-BE-BX/M-ME-MX), servomotors (BMD) and reluctance motors (BSR) could be in conjunction with the S Series: with the breadth of its portfolio, EP provides consumers with an outstanding balance of cost efficiency, efficiency and dynamics.
The mixture of epicycle gear Planetary Reducer Gearbox 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 usually fixed and sunlight gear is driven.
