Industrial Utility Efficiency    

SPX Cooling Technologies Announces Expansion to Gear Drive Line

SPX Cooling Technologies, Inc., a full-line, full-service industry leader in the design and manufacture of evaporative cooling towers and air-cooled heat exchangers, introduces a new model to its expanding line of gearboxes, the M Series Geareducer. The expansion, the M1311 model, is a direct drop-in, aftermarket replacement for Amarillo® 1311 gearboxes, eliminating the need for adaption materials. The entire M Series Geareducer line is designed and manufactured to directly and easily replace other OEM gearboxes in field-erected cooling towers.

SPX Geareducer

The new M1311 model Geareducer gear drive runs with two-stage gear reduction for efficient power transmission.

The new M1311 model Geareducer gear drive incorporates the same differentiating features customers find with the Marley Series 32.2 Geareducer. This includes the Inpro input shaft oil seal to eliminate grooving and extend life. It is available in ratios from 7.89 to 14.64. 

The gear drive’s primary function is to reduce the speed of the electric motor to optimize fan performance. The Marley Geareducer gear drive goes beyond the American Gear Manufacturers Association (AGMA) requirements to maximize air movement through the cooling tower and to minimize maintenance. It provides primary support to the fan, anchors it against lateral movement, withstands shock loads at start-up and during speed changes, and minimizes power transmission losses, as well as sound generation.

The M Series features gears of high-strength, case-hardened alloy steel machined to AGMA Quality Class 9 and above. It is designed to fit into non-Marley cooling towers for easy replacement and has heavy-duty double-row interstage bearings for 100,000 hours of life or more.

The M Series gear drive operates without need for add-on oil pumps, oil filters or oil coolers. It runs with two-stage gear reduction for efficient power transmission. External cooling fins maximize the surface area for cooler operation. The new versatile design aspects coupled with trusted Marley technology make the M Series Geareducer gear drive a match in size and performance for a broad range of cooling tower brands.


About SPX Cooling Technologies, Inc.

SPX Cooling Technologies, Inc. is a leading global manufacturer of cooling towers, evaporative fluid coolers, evaporative condensers and air-cooled heat exchangers providing full-service cooling solutions and support to customers in the power generation, petrochemical, industrial, refrigeration, and heating, ventilation and air conditioning (HVAC) markets for 95 years. SPX Cooling Technologies and its product brands are part of SPX Corporation. For more information, please visit

About SPX Corporation

SPX Corporation is a supplier of highly engineered products and technologies, holding leadership positions in the HVAC, detection and measurement, and engineered solutions markets. Based in Charlotte, North Carolina, SPX Corporation had approximately $1.5 billion in annual revenue in 2016 and more than 5,000 employees in about 15 countries. SPX Corporation is listed on the New York Stock Exchange under the ticker symbol “SPXC.” For more information, please visit