Flender

Flender: Industrial Gearbox Technology by Siemens

Flender GmbH, a Siemens company headquartered in Bocholt, Germany, is one of the world's leading manufacturers of mechanical drive systems. With a heritage dating back to 1899 when Alfred Friedrich Flender founded a mechanical engineering workshop, the company has grown into a global powerhouse with over 8,800 employees and annual revenue exceeding €2.5 billion. Acquired by Siemens in 2005, Flender operates as an independent brand within the Siemens portfolio, combining 125 years of gearbox expertise with Siemens' digital and automation capabilities.

Flender gearboxes transmit power in virtually every heavy industry—cement, mining, steel, sugar, oil and gas, power generation, and marine applications. Their products range from standard industrial gearboxes to highly customized units engineered for extreme torques and operating conditions.

Flender Products Available Through RAZZ Middle East

Standard Industrial Gearboxes

The FLENDER SIG (Standard Industrial Gearbox) range covers helical, bevel-helical, and parallel-shaft configurations with torques from 1,000 to 1,200,000 Nm. Available in 22 sizes with gear ratios from 1.25 to over 1,000, SIG gearboxes serve conveyors, mixers, agitators, pumps, fans, and crushers across Saudi industrial applications. The modular design allows configuration from a single gearbox platform, reducing lead times.

Heavy-Duty Gearboxes

Flender's KMPS (Kilo-Mill Planetary System) gearboxes handle extreme torques up to 10,000,000 Nm for cement and mining mills. TGW heavy-duty helical gearboxes serve large conveyor drives in mining and bulk material handling. Planurex 3 planetary gearboxes deliver high torque density for bucket wheel excavators, apron feeders, and slewing drives. These units are critical for Ma'aden mining operations and Saudi cement production.

Couplings

Flender manufactures a comprehensive coupling range. FLENDER FLUDEX fluid couplings provide soft-start capability for belt conveyors and large fan drives. ARPEX all-steel couplings handle high-speed turbomachinery connections. N-EUPEX flexible couplings serve general industrial pump and motor connections. BIPEX claw couplings provide compact, maintenance-free drives for smaller applications.

Gear Units for Special Applications

FLENDER Turbogear high-speed gear units serve compressor, turbine, and generator applications in power plants and petrochemical facilities. Extruder gear units handle the extreme axial and radial loads in plastic and rubber processing. Sugar mill gear drives are engineered for the specific torque profiles of cane and beet sugar mills.

Flender in Saudi Arabia

Flender gearboxes are deeply embedded in Saudi Arabia's heavy industrial infrastructure. Aramco facilities use Flender gear units in refinery equipment, compressor drives, and pipeline pumping stations. Ma'aden mining operations rely on Flender planetary and heavy-duty gearboxes for conveyor systems, mills, and material handling. Saudi cement plants operated by Saudi Cement, Yamama Cement, and others depend on Flender KMPS and SIG gearboxes for kiln drives and mill drives.

The Siemens integration brings digital monitoring capabilities to Flender gearboxes. The FLENDER ONE platform and Siemens Sidrive IQ digital twin technology enable predictive maintenance—monitoring vibration, temperature, and oil condition in real time to prevent unplanned downtime in critical Saudi industrial processes.

Why Source Flender Through RAZZ Middle East?

RAZZ Middle East sources Flender gearboxes and couplings through authorized channels, delivering 15–25% cost savings on standard units. Standard SIG gearboxes ship within 10–14 business days. Heavy-duty and custom-engineered units require 6–12 weeks. Complete documentation including Siemens/Flender certificates, material reports, and performance datasheets are provided.

Frequently Asked Questions

Is Flender the same as Siemens gearboxes?

Flender is a Siemens company that operates as an independent brand specializing exclusively in mechanical drive systems. When you see "Siemens Flender" or "Flender, a Siemens company," it's the same product line.

What Flender products are fastest to deliver?

Standard SIG gearboxes in common sizes and ratios, N-EUPEX and BIPEX couplings, and replacement components are typically available within 10–14 days.

Does RAZZ supply Flender spare parts for existing installations?

Yes. Gears, bearings, seals, shafts, and coupling elements for Flender gearboxes are available. Provide the gearbox nameplate data for accurate part identification.

What savings can I expect?

Standard Flender gearboxes show 15–25% savings compared to local pricing. Couplings and standard components may show higher savings on volume orders.

Explore related brands: Bonfiglioli, SEW-Eurodrive, and Siemens.