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GEAR
MOTORS

GEAR
MOTORS

SPECIAL MOTORS

HDP

Heavy-Duty Gearboxes
by Bonfiglioli
TECHNICAL DATA
Power, Reliability, and Customization for Demanding Applications

When high output torque, long service life, and operational reliability are required under the toughest industrial conditions, the Bonfiglioli HDP Series delivers. Built with spheroidal cast iron housings and designed with structural symmetry and compactness in mind, HDP parallel shaft gear units are engineered to withstand continuous stress in harsh environments—including explosive atmospheres—with minimal maintenance and extended service intervals.

Thanks to a modular concept and extensive range of options, the HDP Series offers maximum design flexibility, making it ideal for heavy-duty applications in mining, materials handling, water treatment, energy, and more.

Key Features

  • Spheroidal Cast Iron Housing – For superior strength and shock resistance

  • Symmetrical Design – Optimized input/output shaft planarity

  • Parallel Shaft Output Configuration – Compact and space-efficient

  • Wide Accessory Range – Supports broad customization

  • ATEX Certified – Suitable for zones 1 and 21 (2G / 2D environments)

Core Benefits

  • High torque and power transmission capacity

  • Rugged construction for heavy-duty use

  • Flexible mounting arrangements

  • Low operating and maintenance costs

  • High adaptability to project-specific requirements

  • Certified for use in explosive atmospheres (ATEX 2G/2D)

Available Options

  • Integrated or external fan cooling, cooling coil, or oil heater

  • External lubrication systems

  • Backstop device for anti-rotation

  • Forced lubrication for extreme duty cycles

  • Temperature and oil level sensors

  • Drywell for vertical installations

  • Taconite seals for high-contamination environments

Output Shaft Configurations

  • Solid output shaft (single or double-sided, metric or inch)

  • Keyed hollow shaft

  • Shrink disc connection for secure and backlash-free fit

Motor Input Options

  • Input with solid shaft

  • Input with motor coupling for:

    • BN, BE, BX: IEC asynchronous motors

    • BSR: IEC reluctance motors

Motor Accessories

  • PTC thermistors and thermostat sensors

  • Independent forced ventilation

  • Incremental or absolute encoders (sin/cos, single/multi-turn)

  • Tropicalization treatment

  • Anti-condensation heaters

The HDP Series stands at the intersection of performance and durability, offering a robust drive solution with smart engineering and high modularity. Whether in cement plants or energy facilities, Bonfiglioli’s trusted gearbox line, available through Valiadis SA, ensures efficiency without compromise.