RMI Series Worm Gearboxes

STM Gearboxes

Call Us On 01952 676 925 For More On The RMI Series

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The STM RMI Series combines the benefits of helical and worm gearing in an inline package, delivering enhanced efficiency over traditional worm units with the compact right-angle output of a worm drive. This hybrid design uses a helical first stage to reduce speed efficiently, feeding into a self-locking worm stage for high torque multiplication. The result is a gearbox that maintains quiet, smooth operation while offering superior load-holding capabilities. Built in a rugged cast-iron housing, RMI units resist contamination and shock loads in demanding environments. Standard IEC motor adapters ensure broad compatibility. Versatile mounting configurations support horizontal, vertical, or inverted installations, making RMI a flexible choice for many OEM and retrofit applications.

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RMI Series Features

RMI gearboxes offer ratios up to 100:1 and torque capacities up to 4000 Nm. The precision-cut helical input gears operate at high mechanical efficiency, minimising heat buildup before transferring torque through the worm stage. Hardened-steel worms and bronze wheels provide durable, low-wear operation with minimal backlash. The cast-iron casing features sealed bearing arrangements to keep contaminants out and lubricant in. Standard IEC motor interfaces and multiple mounting pads simplify integration with a wide range of motor types. Maintenance-free, sealed-for-life grease options are available for applications where relubrication is difficult.