Rossi
Other Gear Reducers
Beyond Rossi's core industrial gear unit and gearmotor families lies a comprehensive portfolio of specialty gear reducers engineered for specific mounting configurations, space constraints, and niche applications. This category encompasses worm gear reducers (A Series heavy‑duty and AS Series standard‑fit), coaxial (inline) gear reducers (E Series), precision servo gear reducers (SR Series), planetary slew drives (EPS Series), large planetary gearboxes (EP KING), winch‑dedicated rotating‑housing planetary gearboxes (EP WINCH), and drive units on base‑plate/swing‑base assemblies (RE Series). Each sub‑family addresses distinct engineering requirements: the A Series worm reducers provide right‑angle drive with high single‑stage ratios in a robust cast‑iron housing; the E Series coaxial reducers deliver inline input‑output in 16 sizes with a patented housing design; SR Series servo reducers achieve precision positioning with minimal backlash; and the EP WINCH integrates the gearbox directly into the winch drum for transformative footprint reduction in marine and construction applications.
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Trusted by Industry Leaders
Comprehensive Specialty Gear Reducer Portfolio
Worm, coaxial, planetary slew, winch‑integrated, base‑plate drives, and servo reducers from a single supplier.
A Series Heavy‑Duty Worm Reducers with Nickel‑Bronze Worm Wheels
Improved load capacity (6–18%), high wear resistance, and universal mounting with integral feet.
E Series Coaxial Reducers with Patented Housing Strength
16 sizes, 3‑bearing final‑stage pinion, up to 10,000 Nm nominal torque, universal fixing.
EP WINCH Rotating‑Housing Planetary Gearbox
Gearbox integrated into winch drum; DNV Type Approved; up to 125,000 Nm torque; marine, construction, mining.
SR Series Precision Servo Gear Reducers
Low backlash, high torsional rigidity, compatible with virtually all servo motor brands.
RE Series Modular Drive Units on Base‑Plate
Pre‑assembled motor‑gearbox on optimized base frame; reduced mass, increased stiffness, plug‑in simplicity.
Why Choose Rossi Specialty Gear Reducers
Standard drive solutions cannot address every engineering challenge. Rossi's specialty gear reducers fill the gaps — providing optimized mechanical solutions where standard catalogs fall short. Worm gear reducers offer an economical, compact right‑angle drive with inherent self‑braking characteristics and ratios up to 16,000:1 in helical‑worm combinations — ideal for hoists, elevators, and indexing tables. Coaxial reducers solve space‑constrained inline applications where input and output must share the same axis. Planetary slew drives deliver high‑ratio, high‑torque slewing motion for crane turntables, solar trackers, and aerial work platforms. The EP WINCH eliminates the need for a separate gearbox mounting structure, reducing system weight by up to 30% and overall envelope by up to 40%.
Applications and Industries for Specialty and Custom Gear Reducers
Rossi's specialty gear reducers power applications where standard products cannot meet the requirements. Marine winch systems — trawler winches, tower‑crane hoists, winder‑machine capstans — depend on EP WINCH planetary gearboxes for compact, drum‑integrated power with DNV approval. Solar tracking and satellite antenna positioning use EPS slew drives for precise, high‑ratio slewing. Sugar mills and heavy lifting deploy EP KING planetary boxes with 3,000,000 Nm torque. Packaging and automation machinery use SR servo reducers for synchronized, high‑speed indexing. Water treatment plants select A Series worm reducers for sludge thickener drives and surface aerator gearmotors.