This standard is applicable to enclosed gear drives
including configurations of parallel, concentric and
right angle shafts. It includes foot mounted, shaft
mounted, screw conveyor drives and gearmotors.
These enclosed drives utilize spur, helical, herringbone,
double helical, or bevel gearing in single or
multistage, and may include wormgearing in multistage
drives. Bevel gear drives may include shaft
angles other than 90 degrees.
1.1 Limitations
This standard is applicable to gear drives having
single or multiple stage gearing with pitch line
velocities not exceeding 7000 ft/min for spur, helical,
and spiral bevel gearing and 6000 ft/min for straight
bevel, spiral bevel and wormgearing, and component
speeds not exceeding 4500 rpm for helical,
spur, straight bevel and spiral bevel gearing and
3600 rpm for wormgearing. Wormgearing operating
at sliding velocities greater than 2000 ft/min may
require special lubricants, pressurized systems or
both.
1.2 Exceptions
This standard does not cover epicyclic or crossed--
helical gear drives. This standard does not cover the
rating of spur, helical or bevel gears due to wear or
scuffing. The design and rating of the electric motor
is beyond the scope of this standard. This standard
does not apply to gear drives that are covered by
other specific AGMA application standards.