An epicyclic gear teach (also called planetary gear) consists of two gears mounted to ensure that the centre of one equipment revolves around the center of the additional. A carrier links the centres of the two gears and rotates to carry one equipment, called the earth gear or world pinion, around the other, called sunlight gear or sunlight wheel. The earth and sun gears mesh to ensure that their pitch circles roll without slide. A point on the pitch circle of the earth gear traces an epicycloid curve. In this simplified case, the sun gear is fixed and the planetary gear(s) roll around the sun gear.
An epicyclic gear teach can be assembled so the planet gear rolls on the inside of the pitch circle of a fixed, outer gear band, or ring gear, sometimes called an annular gear. In this case, the curve traced by a spot on the pitch circle of the earth 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 this case, the ring equipment is generally fixed and the sun gear is driven.
Epicyclic gears obtain name from their earliest program, 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 only travel in perfect circles, but their motions as viewed from Earth could not end up being reconciled with Planetary Reducer Gearbox circular motion. At around 500 BC, the Greeks invented the idea of epicycles, of circles travelling on the circular orbits. With this theory Claudius Ptolemy in the Almagest in 148 AD could predict planetary orbital paths. The Antikythera System, circa 80 BC, acquired gearing which was able to approximate the moon’s elliptical route through the heavens, and actually to improve for the nine-year precession of that path.[3] (The Greeks could have seen it not as elliptical, but instead as epicyclic motion.)
EP, a versatile and multi-use option, is not just another simple planetary gearbox. EP high-tech planetary reducer is normally a genuine integrated concept, including many functions combined alongside one another to give a complete sub-assembly to the most demanding machines.
EP is the ultimate high-tech servo-reducer, specially focused on designs requiring:
Superior output torsional stiffness
Ultra-high 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 output drive flange for mounting pinions, pulleys, 
couplings, etc.
High input speeds
Superior acceleration and good torque density
Minimum backlash (1 – 3 arc-minutes)
In-Line or right angle arrangements
This versatile design makes it easy for design engineers to find specific answers 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 can be available in the feet or flange versions and can be completed with a wide variety 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 coupled with the S Series: with the breadth of its portfolio, EP provides clients with an outstanding balance of efficiency, price effectiveness and dynamics.