Rossi
H Series - High-Torque Helical & Bevel Helical
The Rossi H Series represents the apex of large-size industrial gear reducer engineering—conceived specifically to deliver the highest reliability under the most extreme application conditions. Built on a two-piece spheroidal cast iron housing with extensive stiffening ribs and high oil capacity, the H Series is available in 12 sizes with torque capabilities reaching 450,000 Nm. Its modular design supports 2, 3, and 4 gear stages in either helical or bevel helical configurations, giving power transmission engineers unparalleled flexibility when designing multi-megawatt drivetrains for mining, cement, sugar, and heavy marine lifting. With case-hardened, ground-profile helical and Gleason spiral bevel gear pairs, the H Series delivers the efficiency, compactness, and rock-solid reliability that heavy industry demands—all backed by one of the industry’s widest torque ranges from a single supplier.
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Trusted by Industry Leaders
Extreme Torque Capacity
Deliver up to 450,000 Nm across 12 frame sizes, making H Series gearboxes suitable for the largest crushers, mills, and hoisting systems.
Two-Piece Spheroidal Cast Iron Housing
A stiffened, high-oil-capacity split housing design ensures maximum structural rigidity and thermal management under continuous high load.
Configurable 2, 3, or 4 Reduction Stages
Flexible gear stage selection—helical and bevel helical—allows engineers to optimize ratio, efficiency, and footprint for each specific application.
Gleason Ground Spiral Bevel Gear Pairs
Precision-ground bevel gears provide smooth, quiet power transfer at right angles with minimal energy loss.
Modular Customization with Short Lead Times
Standardized modular design enables tailored solutions—including non-standard ratios and mounting arrangements—with competitive delivery schedules.
Universal Horizontal & Vertical Mounting
Integrated feet on the housing allow multiple mounting orientations, simplifying drivetrain layout and installation.
Why Heavy Industries Trust Rossi H Series Gear Reducers
In sectors where a single gearbox failure can halt an entire production line, the Rossi H Series provides the margin of safety that plant operators demand. Its oversized bearings, high-capacity oil sump, and stiffened split housing work together to manage the thermal and mechanical stresses inherent to continuous-duty applications like cement mill drives, sugar mill rollers, and stacker/reclaimers. Customers benefit from Rossi’s decades of heavy-industry engineering expertise, resulting in customized drive solutions that extend mean time between overhauls and reduce the total cost of ownership.
Primary Application Sectors for High-Torque Bevel Helical Gearboxes
Rossi H Series gearboxes are deployed in the world’s most demanding production environments. Key application areas include mineral processing and mining (belt conveyors, ball mills), cement plants (kiln and vertical roller mill drives), the sugar industry (cane mills and diffusers), marine and offshore (heavy winches, thrusters), and steel rolling mills. Wherever high power density, reliability, and flexibility in mounting configuration are required, the H Series delivers a future-proof mechanical power transmission solution.