EX Series Planetary Gearboxes

STM Gearboxes

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STM’s EX Series Planetary Gearboxes harness the benefits of multi-planet load distribution to achieve outstanding torque density in a compact envelope. Available in inline, right-angle, and slewing ring variants, the EX Series meets diverse industrial requirements, from precision robotics to heavy-duty slewing applications. Its modular planetary design allows cascading of multiple stages for extremely high reduction ratios without sacrificing stiffness. Balanced planet carriers ensure minimal backlash, essential for automated positioning and indexing systems. Hardened steel gears and precision bearings contribute to high mechanical efficiency and shock-load resilience. OEMs value the EX Series for its scalable configurations, which can be tailored to power ranges from a few kilowatts up to megawatt-class installations.

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EX Series Features

Efficiencies reach up to 95% per stage, minimizing energy loss and heat generation. Torque capacities span from 1,000 to 4,500,000 Nm in the largest variants. Ratio options from 3.7:1 up to 10,000:1 cater to both speed increasers and reducers in multi-stage assemblies. Hardened alloy steel gears and case-hardened planet carriers ensure durability under shock and cyclic loads. Sealed-for-life designs eliminate smell and lubricant changes, reducing maintenance. Standardised mounting interfaces and multiple output configurations streamline integration with IEC/NEMA motors and hydraulic drives. Optional condition-monitoring ports facilitate predictive maintenance.