Planer - ANSWER A machine tool used in the
production of flat surfaces on
pieces too large or too heavy or
perhaps too awkward to hold in a
shaper
Grinding - ANSWER It consists of shaping a piece
by bringing it into contact
with a rotating abrasive
wheel
Caliper - ANSWER A tool used in measuring
diameters
Dial Indicator - ANSWER Used to truly align machine tools, fixtures,
and works, to test and inspect the trueness of
finished work, and to compare
measurement of either heights or depths or
many other measurements
Plasticity - ANSWER The ability of the metal to be deformed
considerably without rupture
Laying out - ANSWER The shop term used to include the marking
of inscribing of center points, circle, arcs, or
straight line upon metal surfaces, either
curved or flat, for the guidance of the
worker
Reaming - ANSWER An operation of sizing and finishing a hole
by means of a cutting tool having several
cutting edges
Countersinking - ANSWER The operation of making a cone shaped
,enlargement of the end of a hole, as for a
recess for a flat head screw
Boring - ANSWER The operation of enlarging a hole by means
of an adjustable cutting tool with only one
cutting edge
Pitch Circle - ANSWER An imaginary circle passing through the
points at which the teeth of the meshing
gears contact each other
Carriage Bolt - ANSWER A type of bolt used in bolting wooden parts
together or wood to metal. It has a portion
of a shank just underneath a round head,
which is designed to keep the bolt from
turning in the wood when the nut is tightened
Diametral Pitch - ANSWER The number of teeth per inch of pitch
diameter and which gives some indications
of the gear teeth
Circular Pitch - ANSWER The distance from the center of one tooth of
a gear the center of the next consecutive
tooth measured of the pitch
Addendum - ANSWER The portion of the gear tooth that projects
above or outside the pitch circle
Deddendum - ANSWER The portion of the gear tooth space that is
cut below the pitch circle and is equal to the
addendum plus the clearance
Gear Rack - ANSWER When meshed with a gear it is used to
change rotary motion to reciprocating
motion
Worm Gear - ANSWER A kind of gears for heavy duty works where
a large ratio of speed is required and are
, extensively used in speed reducers
Bevel Gear - ANSWER A kind of gear to transmit motion from one
shaft to another shaft at an angle to the first
Normalizing - ANSWER The uniform heating of steel above the usual
hardening temperatures, followed by
cooling freely in air
Quenching - ANSWER The operation of cooling a heated piece of
work rapidly by dipping it in water, brine or
oil
Annhealing - ANSWER A method in softening a piece of metal that is
too hard to machine and is done by heating steel
slowly above the usual hardening temperature
keeping it at the heat for ½ to 2 hours then
cooling slowly, preferably in a furnace
Tolerance - ANSWER The total permissible variation in the size of
a dimension the difference between the
limits of size
Squaring - ANSWER The operation of machining the end of a
work piece to make the end square with the
axis
Backslash - ANSWER The clearance between the tooth profiles of
a gear tooth
Dividing Head - ANSWER A mechanism which usually do the indexing
in a machine tool
Abrasive - ANSWER A material that can wear away a substance
softer than itsel
Tap - ANSWER A cylindrical bar of steel with threads
formed around it and grooves or flutes
production of flat surfaces on
pieces too large or too heavy or
perhaps too awkward to hold in a
shaper
Grinding - ANSWER It consists of shaping a piece
by bringing it into contact
with a rotating abrasive
wheel
Caliper - ANSWER A tool used in measuring
diameters
Dial Indicator - ANSWER Used to truly align machine tools, fixtures,
and works, to test and inspect the trueness of
finished work, and to compare
measurement of either heights or depths or
many other measurements
Plasticity - ANSWER The ability of the metal to be deformed
considerably without rupture
Laying out - ANSWER The shop term used to include the marking
of inscribing of center points, circle, arcs, or
straight line upon metal surfaces, either
curved or flat, for the guidance of the
worker
Reaming - ANSWER An operation of sizing and finishing a hole
by means of a cutting tool having several
cutting edges
Countersinking - ANSWER The operation of making a cone shaped
,enlargement of the end of a hole, as for a
recess for a flat head screw
Boring - ANSWER The operation of enlarging a hole by means
of an adjustable cutting tool with only one
cutting edge
Pitch Circle - ANSWER An imaginary circle passing through the
points at which the teeth of the meshing
gears contact each other
Carriage Bolt - ANSWER A type of bolt used in bolting wooden parts
together or wood to metal. It has a portion
of a shank just underneath a round head,
which is designed to keep the bolt from
turning in the wood when the nut is tightened
Diametral Pitch - ANSWER The number of teeth per inch of pitch
diameter and which gives some indications
of the gear teeth
Circular Pitch - ANSWER The distance from the center of one tooth of
a gear the center of the next consecutive
tooth measured of the pitch
Addendum - ANSWER The portion of the gear tooth that projects
above or outside the pitch circle
Deddendum - ANSWER The portion of the gear tooth space that is
cut below the pitch circle and is equal to the
addendum plus the clearance
Gear Rack - ANSWER When meshed with a gear it is used to
change rotary motion to reciprocating
motion
Worm Gear - ANSWER A kind of gears for heavy duty works where
a large ratio of speed is required and are
, extensively used in speed reducers
Bevel Gear - ANSWER A kind of gear to transmit motion from one
shaft to another shaft at an angle to the first
Normalizing - ANSWER The uniform heating of steel above the usual
hardening temperatures, followed by
cooling freely in air
Quenching - ANSWER The operation of cooling a heated piece of
work rapidly by dipping it in water, brine or
oil
Annhealing - ANSWER A method in softening a piece of metal that is
too hard to machine and is done by heating steel
slowly above the usual hardening temperature
keeping it at the heat for ½ to 2 hours then
cooling slowly, preferably in a furnace
Tolerance - ANSWER The total permissible variation in the size of
a dimension the difference between the
limits of size
Squaring - ANSWER The operation of machining the end of a
work piece to make the end square with the
axis
Backslash - ANSWER The clearance between the tooth profiles of
a gear tooth
Dividing Head - ANSWER A mechanism which usually do the indexing
in a machine tool
Abrasive - ANSWER A material that can wear away a substance
softer than itsel
Tap - ANSWER A cylindrical bar of steel with threads
formed around it and grooves or flutes
