COPAZ – free-standing, compact planetary gear unit

Planetary gear units have been an important part of RENK’s product portfolio for many decades. RENK’s planetary gear units transmit outputs of more than 20 MW and torques of more than 4.5 million Nm.
Due to their optimized designs combined with high manufacturing quality, they prove particularly effective during long-term operation and thereby ensure the availability of the system over extended periods of time. RENK very successfully employs three-dimensional, corrected straight/high toothing in the COPAZ. The sun pinions and planetary carriers are case-hardened and ground, the ring gear is highly tempered, optionally hardened, and precision ground.
The gear unit is free-standing; the high-speed coupling is included in the delivery.

The uncomplicated construction of the COPAZ, its high production quality, and outstanding efficiency ensure low life cycle costs. The gear unit is used preferentially in turbine systems for power production purposes as well as in process technology.


COPAZ – free-standing, compact planetary gear unit

Most cost-effective free-standing gear unit solution

Low space requirements


Integrated HSS couplings and coupling guards

No internal axial forces caused by the system

Compensation for thermal external axial forces possible

Co-axial shaft arrangement (no center distance)

Reduced noise emissions due to double-walled housing

High degree of efficiency

Technical data

2 – 35 MW
Low speed shaft:
< 3 600 rpm
High speed shaft:
< 20 000 rpm
3 - 11


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High-speed gear units

P type

The planetary gear units of the P type from RENK-MAAG GmbH are designed and constructed to serve as the core element of power generation systems or as compressor or pump drives.

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Relevant industries


Oil and gas

Turbines, pumps, and compressors for the oil and gas industry; boost your productivity.

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Steel and metal

Components for rollers, roller conveyors, or reel drives for the steel industry: we find the perfect solution for you.

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Energy production

Turbo gear units, couplings, and slide bearings for the field of energy production. RENK drive technology guarantees high system availability at all times.

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Paper industry

Custom-fit couplings and slide bearings for the paper industry.

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