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Types Of
Gears |
| Gear Type |
Description |
Photo |
| Spur Gears |
Spur gears are
by far the most common type of gear and with the
exceptions of the "cog" the type of gear that has been
around the longest.
Spur gears have teeth that run perpendicular to the
face of the gear.
|
Click Image To Enlarge |
| Helical Gears |
Helical gears
are very similar 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 the
same area.
Helical gears can also be used on non-parallel shafts to
transmit motion.
Helical gears tend to run quieter and smoother than
spur gears due to the increased number of teeth in
constant contact at any one period of time.
|
Click Image To Enlarge |
| Herringbone
Gears |
Herringbone
gears resemble two helical gears that have been placed
side by side. They are often referred to as "double
helicals". One benefit of herringbone gears is that it
helps to avoid issues related to side thrust created
with the use of helical gears. |
Click Image To Enlarge |
| Bevel / Miter
Gears |
Bevel gears
are used mostly in situations that require power to be
transmitted at right angles (or applications that are
not parallel). Bevel gears can have different angles of
application but tend to be 90°. |
Click Image To Enlarge |
| Worm Gears |
Worm gears are
used to transmit power at 90° and where high reductions
are required. The worm resembles a thread that rides in
concaved or helical teeth. |
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| Internal Gears |
Internal gears
typically resemble inverted spur gears but are
occasionally cut as helical gears. |
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| Racks |
A rack is
basically a straight gear used to transmit power and
motion in a linear movement. |
Click On Image To Enlarge |
| Face Gears |
Face gears
transmit power at (usually) right angles in a circular
motion. Face gears are not very common in industrial
application. |
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| Involute
Splines |
Splined shafts
and hubs are usually used as connectors in many
different types of applications. One of the most common
applications is to connect motors to gear reducers. They
may also be used in transmissions. Involute splines
resemble spur gears, but tend to have different pressure
angles.
|
Click Image To Enlarge |
| Straight Sided
Splines |
Straight sided
splines often serve the same function as involute
splines but have "straight sided" teeth instead of
involute teeth. |
Click On Image To Enlarge |
| Sprockets |
Sprockets are
used to run chains or belts. They are typically used in
conveyor systems. |
Click Image To Enlarge |
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