Gear are design and construction of the pair employed, can change the direction of movement and/or increase the output speed or torque according required output.
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2. Straight
spur
A spur is a lateral ridge or
tongue of land descending
from a hill, mountain or
main crest of a ridge. 2
3. Helical Spur
Helical gears last longer and are
ideal for high-load applications,
since they have a higher number
of teeth in contact. Load is at all
times distributed among several
axes, which produces less wear.
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4. Herringbone
Used for transmitting power
between parallel shafts. It was
developed to overcome the
disadvantage of the high-end
thrust that is present with single-
helical gears.
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5. Plain Bevel
Bevel gears are gears where the
axes of the two shafts intersect
and the tooth-bearing faces of the
gears themselves are conically
shaped.
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6. Spiral Bevel
Spiral bevel gears are bevel gears
whose axes intersect, often at a
90-degree angle. The teeth are
cut with a slight curve along their
length and an involute profile.
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7. Hypoid
Hypoid gears are normally used in
right-angle drives associated with
the axles of automobiles. Hypoid
gears are a unique category of spiral
bevel gears that are used to transmit
rotational power between two shafts
at right angles.
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8. Planetary
Planetary gear sets are used in automatic
transmissions, and they include a ring
gear, planet carrier and sun gears.
Securing the sun gear or the planet
carrier produces different ratios. High
efficiency due to low rolling power. Almost
unlimited transmission ratio options due
to combination of several planet stages.
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9. Worm
Used as high-ratio reductions to change
the direction of shaft rotation and to
decrease speed and increase torque
between non-parallel rotating shafts.
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10. Rack and
Pinion
A rack and pinion are used when
converting rotational movement to linear
motion (or vice versa). It make good
actuators for quarter-turn butterfly and
ball valves where the arc of travel is
limited to a fixed angle such as 90°.
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11. Special thanks
Highest package of
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RSR Rungta College of Engineering and Technology