Rossi
E Series - Coaxial
The Rossi E Series is a sophisticated family of coaxial (inline) helical gear reducers and gearmotors engineered for applications demanding compact dimensions, high efficiency, and robust power transmission. Spanning 16 carefully graduated sizes with power from 0.12 to 100 HP and nominal torque up to 10,000 Nm, the E Series features a strong patented housing design and a unique final-stage pinion supported by three bearings for significantly increased torque capacity. Achieving efficiency levels up to 96%, these coaxial drives are optimally suited for mixer and agitator drives, pump drives, conveyor systems, and general industrial machinery where the input and output shafts must share a common rotational axis. The highly compatible modular system, closely spaced size increments, and universal mounting options make the E Series a versatile choice for OEMs and plant operators seeking a space-efficient, high-performance inline solution.
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Trusted by Industry Leaders
Patented Tri-Bearing Final Stage
Three bearings on the final stage pinion dramatically increase radial and axial load capacity, extending gearbox life under harsh conditions.
High Efficiency Up to 96%
Precision-ground helical gear pairs ensure minimal energy loss and reduced heat generation, lowering operating costs.
Compact Coaxial Architecture
Inline input/output shaft configuration saves space and simplifies machine design, especially for vertically mounted agitator and mixer applications.
Sixteen Closely Spaced Sizes
A finely graduated size range allows precise matching of gearbox to application, avoiding over-engineering and unnecessary cost.
Universal Mounting with Integral Feet & B5 Flange
Flexible mounting options support horizontal and vertical installation without custom adapters.
Rigid Single-Piece Cast Iron Housing
Monobloc construction maintains precise gear alignment and reduces vibration for smoother, quieter operation.
Why Choose Rossi E Series Coaxial Gearmotors for Inline Drive Applications
Coaxial gearboxes are the preferred architecture when the motor and driven shaft must occupy the same axis—common in top-entry agitators, vertical pumps, and compact conveyor drives. The Rossi E Series excels in these applications by combining the highest efficiency in its class with a patented bearing arrangement that handles the substantial overhung loads typical of mixer impellers. For plant engineers, this means a single, reliable gearmotor can replace more complex belt-drive or right-angle configurations, simplifying maintenance and reducing spare parts inventory.
Application Sectors for Rossi Coaxial Helical Drives
The E Series powers a diverse array of industrial equipment. In the chemical and process industries, it drives top-entry and side-entry agitators, mixers, and reactors. Water and wastewater treatment plants deploy it for aerators, flocculators, and clarifier drives. In food and beverage manufacturing, E Series gearmotors run blending tanks and continuous mixing systems. General industrial applications include belt conveyors, bucket elevators, and fan drives—anywhere a compact, efficient inline power transmission solution is required.