An epicyclic gear teach (also known as planetary gear) contains two gears mounted so that the centre of one equipment revolves around the center of the various other. A carrier connects the centres of the two gears and rotates to carry one equipment, called the planet gear or planet pinion, around the various other, called the sun gear or sun wheel. The earth and sunlight 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, the sun gear is fixed and the planetary gear(s) roll around the sun gear.

An epicyclic gear train can be assembled so the planet gear rolls on the inside of the pitch circle of a fixed, outer gear band, or ring equipment, sometimes called 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 generally fixed and the sun gear is driven.

Epicyclic gears get their name from their earliest program, that was the modelling of the motions of the planets in the heavens. Believing the planets, as everything in the heavens, to be perfect, they could only travel in perfect circles, but their motions as viewed from Earth could not end up being reconciled with circular movement. At around 500 BC, the Greeks invented 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 able to approximate the moon’s elliptical route through the heavens, and actually to improve for the nine-yr precession of that route.[3] (The Greeks would have seen it much less elliptical, but rather as epicyclic motion.)
EP, a versatile and multi-use answer, is not just another simple planetary gearbox. EP high-tech planetary reducer is usually a true integrated concept, including several functions combined together to give a complete Planetary Reducer Gearbox sub-assembly to the virtually all demanding machines.
EP is the ultimate high-tech servo-reducer, specially focused on designs requiring:
Superior output torsional stiffness
Ultra-great 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 excellent 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 actual solutions to the most demanding applications.
Parallel shaft Gearmotors
Helical Single-Stage
The S Series design produces this gearmotor particularly effective for fan, pump and blower applications. To meet up the needs of consumers in these sectors, the S Series can be available in the ft . or flange versions and can be completed with an array of electric motors entirely made by EP. Asynchronous motors both IEC and small (B-BE-BX/M-ME-MX), servomotors (BMD) and reluctance motors (BSR) can be in conjunction with the S Series: with the breadth of its portfolio, EP provides clients with a superb balance of dynamics, performance and cost effectiveness.