New series of planetary gear units offers highest ­efficiency in its class

Siemens has widened its portfolio of planetary gear units.portfolio of planetary gear units. The Planurex 3 is available in ten sizes, with a torque range from 1700 to 5450 kNm. This raises the highest torque in the standard modular system from the previous 2600 kNm up to 5450 kNm. The size grading is harmonized to reduce the jump in power ratings between different sizes. This makes a suitable torque and a suitable transmission ratio available for almost every application. The gear units also have the highest efficiency in their class. This has been achieved by increasing the torque density (Nm/kg) by an average of 17.2 % in comparison to the previous series. A compact design enables space-saving, high transmission ratios to be achieved. This not only reduces the weight, but also the stress on the gear unit and application.

Planurex 3 is part of an Integrated Drive System (IDS), which is available as a complete solution, comprising motor, gear unit and coupling, combined with an oil supply system. The integrated drive system facilitates economic, efficient plant operation, as the components are perfectly matched to one another.

The technologically further developed Flender Planurex series 3 replaces the Planurex 2 planetary gear unit series, initially in the XL range up to 5450 kNm. The harmonized size grading across the entire torque range allows better dimensioning of the gear units. Thanks to their ruggedness, all sizes of the new planetary gear unit can absorb peak loads up to twice their nominal torque. Siemens has also extended the warranty on the Planurex 3, and shortened its delivery times.

Planetary gear units are primarily installed where high output ranges are required in limited space. They are typically used as roller press and central drives for tube mills in mines and cement plants.


Flender Planurex 3 with torque range from 1700 to 5450 kilonewton meters (kNm)

Harmonized size grading and additional sizes

Higher power rating with lower weight in comparison to the previous series

Integrated Drive System (IDS), comprising motor, gear unit and coupling, for efficient plant operation

//" target="_blank" >


Related articles:

Issue 5/2018 FLENDER GMBH

New planetary gear units for roller presses offer the best power density in the market

Planurex 3 L

Flender is expanding its portfolio of application-specific gear units and, with the Planurex 3 L for roller presses, is bringing out gear units with the currently highest available power density in...

Issue 9/2015 SEW-EURODRIVE

XP planetary gear units from a modular system

SEW-Eurodrive from Bruchsal/Germany has completely overhauled its XP series of planetary gear units with a torque range of 600 to 5200?kNm. The XP gear units are now based on a modular system. This...

Issue 12/2010

New plant for large gear units opened

SEW-EURODRIVE has opened a new plant for large gear units at its site in Bruchsal (Fig.). Accordingly the SEW- EURODRIVE now has a worldwide production network for large gear units with production...

Issue 5/2017 CURRAX GMBH & CO. KG

Bucket elevator drives from Currax now feature new Simogear auxiliary drive

Bulk materials such as cement and lime need to be reliably transported over several meters in height. Currax offers its customers the ideal solution with fully redesigned bucket elevator drives. This...

Issue 10/2010

FLSmidth MAAG Gear

FLSmidth MAAG Gear is a global leader in high-quality, heavy-duty gear units for the cement and minerals industry. The company belongs to the successful FLSmidth Group, a listed Danish firm.   At the...