Mechanical Definitions |
Wagon Drill : It is a vertically mounted, pneumatic,
percussive-type rock drill which is supported on a three-wheeled
or four-wheeled wagon. |
Wall Bracket : It is a shaft hanger which is frequently
attached to a wall or post. In other words, it is a bracket
which is attached to a wall and used as a support. |
Washer Cutter : It is a machine which has a fixed center
and either one or two adjustable cutting points for cutting
washers from leather, rubber, etc. |
Waste Lubrication : It is a type of lubrication which
has packing oil-soaked waste in a journal box. It is common
practice on railway cars. |
Water Hammer : It is a pressure surge or wave results
because of sudden stoppage of water flow or change in a flow
direction. Usually it occurs when a valve is closed suddenly
at the end of a pipeline system, and a pressure wave propagates
in the pipe. |
Water-tube Boiler : It is a steam boiler in which water
circulates within tubes and heat is applied from outside the
tubes in order to generate steam. It is used for high-pressure
boilers. |
Weir : It is a small over flow type dam which is generally
used to raise the level of a river or stream. In other words,
an obstruction of a stream flow over which water flows can be
called a weir. |
Worm and Worm Wheel : It is a gear arrangement which
is used for transferring motion in a direction at right angle.
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