High Quality Gearboxes – From Design to Production

Welcome to SITI Power Transmission USA, Inc.

SITI Power Transmission is a manufacturer of gearboxes, geared motors and electro-mechanical drive technologies. We are located in Littleton, Massachusetts, and are the American subsidiary of SITI Riduttori, SpA., in Monteveglio, Italy. Our products are 100% Italian made, and can be found in many industries, including; food, water, automotive, packaging, material handling and logistics. Our global network of branches and dealers, provide technical support and inventory in 61 countries, giving our customers quick, reliable service, before and after the sale.

Our Products

SITI offers a wide range of quality gearboxes and gearmotors, using worm, planetary, helical, and bevel-helical technologies, as well as mechanical variable speed drive units available in a variety of sizes and configurations.

Worm Gearboxes

The I & U Series Worm gear reducers deliver a cost effective solution for OEM’s, while delivering superior reliability to the end user. Their rigid cast aluminum housings (up to size 110) are light weight, maintenance free, quiet and efficient. The modular design allows for multiple bolt-on components to customize for your application, including; helical input, double worm combinations, multiple output flanges per size, torque arm, shaft covers, and single & double output shafts.

Planetary Gearboxes

The NRG Planetary gearbox combines high performance, compact size, long life, and excellent value. It is the ideal choice for heavy duty, high shock load applications and is available in-line or right angle. It’s modular design is fully configurable with options for  mounting, with both male or female versions for space saving shaft mounting, or direct coupling to the machine. 

Helical & Bevel-Helical Gearboxes

The BH right-angle, NHL Inline helical and PD Parallel helical series gearboxes provide efficiency over 90% in both torque directions, at all input speeds, and are interchangeable with many brands.. The modular gear system offers an extremely wide range of ratios, achieved through 2-, 3- or 4-stage versions offering reliability, robustness, and wide output torque range. The modular design allows for multiple bolt-on components to customize for your application, including; helical input, double worm combinations, multiple output flanges per size, torque arm, shaft covers, and single & double output shafts.

Mechanical Variable Speed

Mechanical variable speed offers quiet, reliable, speed variation, when inverter is not an option. No complicated electrical wiring, no wash-down problems, no complicated manual to study. It comes in 7 Sizes, with over 200 different design configurations. Output speeds can be brought to ZERO. Standard output flanges allow easy mounting to your existing gearbox or motor.

Special Gearboxes

Special and custom gearbox and gearmotor solutions are sometimes needed to ensure safe, reliable and efficient operation OEM equipment. SITI manufactures custom gearboxes to meet unique application challenges. Our engineering team offers complete support from inception to completion. With more than 50 years of experience, our experts will design are here to work with your design and engineering teams to create the perfect gearbox for your needs.

Contact Us

We’re here to answer your questions and provide the information you need to know.

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