Amarillo Gear Company LLC

- Right Angle Gear Drives for Cooling Towers


The drives Amarillo Gear Company LLC produces for cooling tower and air fin heat exchanger service reflect a long history of quality workmanship and reliability. Amarillo Gear has been designing and manufacturing right angle drives since 1934, and the commitment to excellence continues today. One example of this commitment is the availability of complete noise and vibration testing, with all data taken under full horsepower loading up to 500 hp.

Design features and ratings are in accordance with, or exceed, the minimum requirements of AGMA (American Gear Manufacturers Association) and CTI (Cooling Technology Institute) standards.

  • Housing and Castings
    Castings are rigidly designed and constructed to absorb internal and external loads with minimum deflection. Gear case and cover are manufactured to assure permanent alignment of bearings and gears under load. The sloped floor of the gear case adds rigidity and permits complete oil drainage. All casting materials are gray cast iron for effective damping of noise and vibration. All mating castings are sealed using 'formed-in-place' gasket material that eliminates 'weeping' associated with fiber-type gaskets. Gear cases are pre-drilled with pilot holes to assist in installation of dowel pins.
  • Spiral Bevel Gears
    Designed and manufactured by Amarillo Gear Company LLC for fan drive service. All spiral bevel gears are precision machined from high grade alloy steel, case hardened and lapped in pairs.
  • Helical Gears
    Helical gears are designed specifically for fan drive service and are precision machined from high grade alloy steel, case hardened and precision ground to provide low-noise, low vibration operation.
  • Bearings
    Amarillo Gear is an industry leader with L10a bearing life exceeding 100,000 hours on all bearings. Input and intermediate bearings provide double the service life specified in AGMA and CTI standards, resulting in lower maintenance costs. The fan shaft bearings are designed to carry all loads imposed by the fan while maintaining this outstanding bearing life. Only trusted name brand bearings such as Timken and SKF are installed in Amarillo fan drives.
  • Quiet Operation
    Quiet operation of the Amarillo Fan Drives is achieved through careful design and controlled manufacturing methods of components. Our engineers understand all of the many parameters that affect gear noise and have applied the latest research to the design and manufacture of all components. Parameters that reduce gear noise are controlled during design, manufacturing, and assembly to ensure quiet operation. Rigid shafts and permanently aligned housings guarantee alignment of gears under load. Test results collected in our state-of-the-art test facility prove that our sound levels are the lowest available in the industry.
  • Shafting
    Amply sized to provide a rugged spindle for the fan. Surfaces for gears, bearings, input coupling and fan hub are precision machined.
  • Shaft Seals
    Both the input and output shaft openings have 2 spring-loaded, single-lip seals to keep outside contamination from entering the gearbox. Plus, the output shaft has a labyrinth-type plate directly mounted to the shaft to triple protect the gearbox from contamination that might try to enter due to the natural effect of gravitation.
  • Lubrication
    Oversized slinger on the input shaft provides excellent lubrication in either direction or at half speed operation. Continuous circulation of oil to all bearings is assured by location of adequately sized channels and baffles. Double reduction units can also be supplied with a positive displacement bi-directional oil pump/internal oil distribution system.This pump is driven from the intermediate shaft and provides a redundant lubrication system for extreme reliability. A permanently mounted oil sight glass is provided on all units to provide direct visual determination of oil level. Fan drives ship with the first fill of operating mineral oil installed. Synthetic oil is also available as an option. Synthetic lubricants offer advantages of extended service life, a broader operational temperature range, reduced friction, and the ability to maintain a higher film strength which can extend the service life of the gear drive.
  • Low Speed Operation
    For operation when motor speeds are less than 450 rpm, single reduction fan drives require Amarillo Gear's exclusive 'Low Speed' option, and double reduction fan drives require a mechanical oil pump for proper lubrication. The addition of these options allow operation with no minimum input speed restrictions.
  • Service Openings
    Large inspection opening facilitates periodic inspections. Ports for oil fill, oil drain and venting are tapped and located for installation of remote service piping when desired.
  • Optional Features
    Special output shaft extensions, backstops (anti-windmilling), oil level switches, oil heaters & thermostats, oil temperature gauges, spot-face/drill & tap for vibration transducers, 'low speed' option, and other accessory items are available on special order

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