An epicyclic gear train (also called planetary gear) includes two gears mounted so that the centre of one equipment revolves around the centre of the other. A carrier connects the centres of the two gears and rotates to transport one equipment, called the earth gear or 
world pinion, around the other, called the sun gear or sunlight wheel. The earth and sun gears mesh to ensure that their pitch circles roll without slide. A spot on the pitch circle of the earth gear traces an epicycloid curve. In this simplified case, sunlight gear is set and the planetary gear(s) roll around the sun gear.
An epicyclic gear teach can be assembled so the planet equipment rolls on the inside of the pitch circle of a fixed, outer gear ring, or ring gear, sometimes named an annular gear. In cases like this, the curve traced by a spot on the pitch circle of the planet is a hypocycloid.
The mixture of epicycle gear trains with a planet engaging both a sun gear and a ring gear is named a planetary gear train.[1][2] In cases like this, the ring equipment is usually fixed and sunlight gear is driven.
Epicyclic gears get their name from their earliest application, that 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 only travel in ideal circles, but their motions as viewed from Earth could not become reconciled with circular motion. At around 500 BC, the Greeks created the idea of epicycles, of circles venturing on the circular orbits. With this theory Claudius Ptolemy in the Almagest in 148 AD could 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-season precession of that path.[3] (The Greeks would have seen it not as elliptical, but instead as epicyclic motion.)
EP, a versatile and multi-use remedy, is not simply another simple planetary gearbox. EP high-tech planetary reducer is a true integrated concept, including countless functions combined collectively to offer 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-substantial 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 installation pinions, pulleys, couplings, etc.
High input speeds
Superior acceleration and exceptional torque density
Minimum backlash (1 – 3 arc-minutes)
In-Line or proper angle arrangements
This versatile design helps it be possible 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 blower applications, pump and fan. To meet the needs of clients in these sectors, the S Series is also available in the ft . or flange Planetary Reducer Gearbox versions and may be completed with a broad range of electric motors entirely manufactured 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 consumers with a superb balance of efficiency, price effectiveness and dynamics.