Epicyclic gears obtain name from their earliest software, that was the modelling of the movements 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 seen from Earth could not become reconciled with circular movement. At around 500 BC, the Greeks developed the thought of epicycles, of circles travelling 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, experienced 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 much less elliptical, but instead as epicyclic motion.)
EP, a versatile and multi-use alternative, is not only another simple planetary gearbox. EP high-tech planetary reducer is usually a true integrated concept, including many functions combined collectively 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 gear train, based on REDEX’s differential know-how
ISO 9409-1 output drive flange for mounting pinions, Planetary Reducer Gearbox 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 possible for design engineers to find specific solutions to the most demanding applications.
Parallel shaft Gearmotors
Helical Single-Stage
The S Series design produces this gearmotor particularly effective for pump, blower applications and fan. To meet the needs of clients in these sectors, the S Series can be available in the foot or flange variations and can be completed with a wide range 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) could be coupled with the S Series: with the breadth of its portfolio, EP provides buyers with an outstanding balance of dynamics, effectiveness and cost effectiveness.

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 this instance, the ring gear is normally fixed and sunlight gear is driven.