Machining Fundamentals 624
W
water jet cutting: A machining process that
uses a high-velocity, high-pressure stream
of water to cut through materials. Also called
hydrodynamic machining (HDM). (Ch. 32)
waviness: The presence of smoothly rounded
peaks and valleys caused by tool and
machine vibration and chatter. Waviness is of
greater magnitude than roughness. (Ch. 30)
wavy set: A saw tooth set in which several
teeth are angled to the right and several to
the left, alternating continuously along the
blade. Wavy set is recommended for work
with varying thicknesses, such as pipe,
tubing, and structural materials. (Ch. 21)
ways: The fl at or V-shaped bearing surface that
aligns and guides the movable part of the
machine. (Ch. 14)
Webster hardness tester: A portable testing
device for checking the hardness of materials
such as aluminum, brass, copper, and mild
steel. (Ch. 29)
wheel dresser: A tool for cleaning,
resharpening, and restoring the mechanical
accuracy of the cutting faces of grinding
wheels. (Ch. 13)
word: In a word address format programming
language, a combination of letters and
numerical data. (Ch. 23)
word address format: A style of
programming that uses groups of letters and
numbers, referred to as words, to program
instructions for a CNC machine tool.
(Ch. 23)
work envelope: The volume of space defi ned
by the reach of the robot arm in three-
dimensional space. (Ch. 26)
working drawing: A drawing or drawings
that give a machinist the necessary
information to make and assemble a
mechanism. (Ch. 4)