Mechanical Definitions |
Jack: It is a mechanical device which is used to lift
heavy loads or apply great forces through a short distance.
It is operated by a lever, a screw or a hydraulic press. |
Jacket : The space through which a cooling liquid circulates
around an engine cylinder. |
Jackhammer : It is a hand-held percussive drill operated
by compressed air. It is used for drilling rock and breaking
up pavement. It is also known as Pneumatic Drill. |
Jack Ladder : It is a V-shaped trough holding chain which
is toothed endless. It is used in order to move logs from pond
to sawmill. |
Jackleg : It is a supporting bar used in a jackhammer.
|
Jackscrew : It is a type of jack which is operated by
turning a leadscrew. It is also known as a screw jack. It is
commonly used as car-jacks. |
Jackshaft : It is a common mechanical component which
is designed to transfer or synchronize rotational force in a
machine. It also known as a Countershaft. |
Jaw : It is a notched part which allows a railroad-car
axle box to move vertically. |
Jaw Crusher : It is a machine designed to break rock
between two steel jaws, one fixed and the other being moved
back. It is also termed as Jawbreaker. |
Jeep : It is a small durable general-purpose motor vehicle
with four-wheel drive and a quarter-ton capacity which is commonly
used in military services. |
Jet Condenser : It is a direct-contact steam condenser
designed to utilize the aspirating effect of a jet for the removal
of noncondensables. |
Jet Hole : It is a borehole which is drilled by use of
a directed, forceful stream of fluid or air. |
Jet Molding : The process of molding in which most of
the heat is applied to the material in order to mold the material
as it passes through a nozzle or jet, rather than in a conventional
heating cylinder. |
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