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