Bonfiglioli S Series

Bonfiglioli S Series is a compact, high-efficiency single-stage parallel shaft helical gearmotor, tailored for light to medium-duty industrial applications that demand space-saving design and reliable performance. As a cost-effective solution in Bonfiglioli’s lineup, this series integrates precision helical gears with its signature Unibox housing, striking an optimal balance between operational efficiency, installation flexibility, and affordability for global users.

Covering a targeted performance spectrum, the S Series offers power outputs ranging from 0.09kW to 11.6kW, output torque between 21Nm and 200Nm, and transmission ratios from 1.4:1 to 13.1:1. Its single-stage transmission structure simplifies the design, reducing overall size while maintaining high operational efficiency—achieving up to 97% thanks to precision-ground helical gears. The gears are crafted from high-quality alloy steel, undergoing heat treatment to enhance wear resistance and ensure smooth, low-noise meshing, making it ideal for noise-sensitive environments.

A key highlight is the integrated Unibox housing, a one-piece cast aluminum or cast iron structure (depending on the model) that delivers exceptional torsional rigidity while minimizing weight and footprint. This compact design allows easy installation in space-constrained setups, with versatile mounting options including foot, flange, and hollow-shaft configurations to adapt to diverse equipment layouts.

The S Series is fully compatible with a wide range of motors, from standard IE2/IE3 models to high-efficiency IE4/IE5 variants, enabling seamless integration into existing drive systems. It features standard IP54 protection to resist dust and moderate moisture, with optional upgrades for harsher conditions. Widely deployed in pumps, fans, small conveyors, and auxiliary machinery, this series offers lifelong lubrication and sealed components to reduce maintenance needs, embodying Bonfiglioli’s commitment to reliable, cost-effective power transmission solutions.