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Gear Type Description Photo
Spur Gears Spur gears are by far the
most common type of gear
and with the exceptions ofthe "cog" the type of gear
that has been around the
longest.
Spur gears have teeth thatrun perpendicular to the
face of the gear.
HelicalGears
Helical gears are verysimilar to spur gears except
the teeth are not
perpendicular to the face.The teeth are at an angle to
the face giving helical gears
more tooth contact in thesame area.
Helical gears can also beused on non-parallel shafts
to transmit motion.
Helical gears tend to run
quieter and smoother thanspur gears due to the
increased number of teeth in
constant contact at any one
period of time.
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Herringbon
e Gears
Herringbone gears resemble
two helical gears that have
been placed side by side.They are often referred to as
"double helicals".
ne benefit of herringbone
gears is that it helps to avoidissues related to side thrust
created with the use of
helical gears.
!evel #iter Gears
!evel gears are used mostlyin situations that require
power to be transmitted atright angles $or
applications
that are not parallel%. !evel
gears can have differentangles of application but
tend to be &'°.
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0ace Gears 0ace gears transmit power
at $usually% right angles in a
circular motion. 0ace gearsare not very common in
industrial application.
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*nvolute
Splines
Splined shafts and hubs are
usually used as connectors
in many different types ofapplications. ne of the
most common applications
is to connect motors to gear
reducers. They may also beused in transmissions.
*nvolute splines resemble
spur gears1 but tend to havedifferent pressure angles.
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Straight
Sided
Splines
Straight sided splines often
serve the same function as
involute splines but have
"straight sided" teethinstead of involute teeth. +lic, n *mage
To nlarge
Sproc,ets Sproc,ets are used to runchains or belts. They are
typically used in conveyor
systems.
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