Epicyclic gears get their name from their earliest software, that 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 only travel in perfect circles, but their motions as seen from Earth cannot end up being reconciled with circular motion. 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 could predict planetary orbital paths. The Antikythera System, circa 80 BC, experienced gearing which was in a position to approximate the moon’s elliptical path through the heavens, and even to correct for the nine-12 months precession of that route.[3] (The Greeks could have seen it much less elliptical, but rather as epicyclic motion.)
EP, a versatile and multi-use alternative, is not merely another simple planetary gearbox. EP Planetary Reducer Gearbox high-tech planetary reducer is a true integrated concept, including many functions combined together to provide a complete sub-assembly to the virtually all demanding machines.
EP is the best high-tech servo-reducer, specially dedicated to designs requiring:
Superior output torsional stiffness
Ultra-huge 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 productivity drive flange for mounting pinions, pulleys, couplings, etc.
High input speeds
Superior acceleration and superb torque density
Minimum backlash (1 – 3 arc-minutes)
In-Line or correct angle arrangements
This versatile design helps it be easy for design engineers to find actual answers to the most demanding applications.
Parallel shaft Gearmotors
Helical Single-Stage
The S Series design produces this gearmotor particularly effective for fan, blower applications and pump. To meet the needs of buyers in these sectors, the S Series is also available in the ft . or flange variants 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) can be coupled with the S Series: with the breadth of its portfolio, EP provides buyers with an outstanding balance of cost performance, dynamics and efficiency.

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 gear is normally fixed and the sun gear is driven.