An epicyclic gear train (also called planetary gear) consists of two gears mounted to ensure that the centre of 1 gear revolves around the centre of the additional. A carrier connects the centres of both gears and rotates to carry one gear, called the planet gear or world pinion, around the various other, called sunlight gear or sunlight wheel. The planet and sun gears mesh so that their pitch circles roll without slide. A spot on the pitch circle of the earth equipment traces an epicycloid curve. In this simplified case, sunlight gear is fixed and the planetary equipment(s) roll around the sun gear.
An epicyclic gear teach can be assembled therefore the planet gear rolls on the inside of the pitch circle of a fixed, outer gear ring, or ring gear, sometimes named an annular equipment. In cases like this, the curve traced by a spot on the pitch circle of the planet is a hypocycloid.
The combination 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 normally fixed and sunlight gear is driven.
Epicyclic gears obtain name from their earliest application, which was the modelling of the actions 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 viewed from Earth could not be reconciled with circular motion. At around 500 BC, the Greeks created the Planetary Reducer Gearbox thought 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, acquired gearing which was able to approximate the moon’s elliptical path through the heavens, and even to correct for the nine-yr precession of that path.[3] (The Greeks could have seen it not as elliptical, but rather as epicyclic motion.)
EP, a versatile and multi-use solution, is not only another simple planetary gearbox. EP high-tech planetary reducer is usually a true integrated concept, including some functions combined along to provide a complete sub-assembly to the most demanding machines.
EP is the best high-tech servo-reducer, specially focused on designs requiring:
Superior output torsional stiffness
Ultra-large 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 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 helps it be easy for design engineers to 
find precise solutions to the most demanding applications.
Parallel shaft Gearmotors
Helical Single-Stage
The S Series design causes this gearmotor particularly effective for fan, pump and blower applications. To meet up the needs of customers in these sectors, the S Series can be available in the ft . or flange editions and will be completed with a 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 in conjunction with the S Series: with the breadth of its portfolio, EP provides customers with an outstanding balance of cost performance, dynamics and efficiency.