Amarillo Series gearbox

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Castings are rigidly designed and constructed to absorb internal and external loads with minimum deflection

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 drainage of oil. All casting materials are gray iron for effective damping of noise and vibration. All mating castings are sealed using "formed-in-place" gasket material which eliminates "weeping" associated with fibertype gaskets. Gearcases are pre-drilled with pilot holes to assist in installation of dowel pins.

Spiral Bevel Gears
Designed and manufactured by Amarillo Gear Company for fan drive service. All spiral bevel gears are precision machined from nickel alloy steel, case hardened and lapped in pairs.

Helical Gears
Helical gears are designed specifically for fan drive service and are precision machined from nickel alloy steel, case hardened and precision ground to provide low-noise, low vibration operation.

Bearings
All bearings are roller type, provided by major manufacturers. The fan shaft thrust bearing is designed to carry all loads imposed by the fan while maintaining 100,000 hours L₁₀ life. All bearings are sized to meet or exceed the minimum life requirements of AGMA and CTI.

Quiet Operation
Quiet operation of the Amarillo Gear Drives is achieved through careful design and controlled manufacturing methods of components. Our engineers understand all of the many parameters that effect 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 rigid, 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.

Shaft Seals
Both the input and output shaft openings have dual spring-loaded, single-lipped type 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
Oversize slinger on the input shaft provides adequate lubrication in either direction or at half speed operation. Continuous circulation of oil to all bearings is assured by location of channels and baffles. Double reduction units can also be supplied with a positive displacement bi-directional oil pump and oil distribution system to all bearings. This pump is driven from the intermediate shaft and provides a redundant lubrication system for extreme reliability. A permanently mounted oil sight level gauge is provided on all units to provide direct visual determination of oil level.

Service Openings
Large inspection plate 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 switches, spot-face/drill & tap for vibration transducers, "low speed" option and other accessory items are available on special order.

Shafting
Amply sized to provide a rugged spindle for the fan. Surfaces for gears, bearings, input coupling and fan hub are precision ground.

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 allows operation with no minimum input speed restrictions.

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Amarillo Series gearbox

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