TOOLING U - OVERVIEW OF MACHINE
TOOLS 121 CORRECT QUESTIONS &
ANSWERS
Arbor - ANSWER An axle-like machine component attached at one end to the spindle in
a horizontal milling machine. The arbor holds and rotates the milling cutter.
Automatic Bar Machines - ANSWER A turning machine that continuously cuts a number
of parts from a piece of bar stock. Automatic bar machines are also known as bar
feeding machines.
Axis - ANSWER An imaginary straight line that passes through the center of an object.
A cylindrical workpiece typically rotates around its axis.
Band Saws - ANSWER A saw that uses a saw blade constructed from a continuous
loop or band of metal. Band saw blades are flexible, so they are able to cut gradually
curving lines in flat workpieces.
Bar Feeding Machines - ANSWER A turning machine that continuously cuts a number
of parts from a piece of bar stock. Bar feeding machines are also known as automatic
bar machines.
Bar Stock - ANSWER Raw material purchased from metal manufacturers in the form of
long pieces. Bar stock is a common form of workpiece material.
Base - ANSWER The foundation of a machine that supports all the other machine
components. Bases provide both stability and rigidity.
Bed - ANSWER The main supporting structure upon which the operating parts of a
machine are mounted and guided. Beds provide a foundation for various machine tools.
Bed-Type Milling Machine - ANSWER A type of milling machine with a large bed that
only moves along a horizontal axis. Bed-type milling machines mill large, flat
workpieces.
Boring - ANSWER The process of enlarging an existing hole with a single-point tool.
Boring is commonly performed on a lathe.
Broach - ANSWER A multi-point cutting tool made of a series of teeth that progressively
increase in size. Broaches can both remove metal and finish the surface of a workpiece
with one pass of the cutting tool.
, Broaching Machine - ANSWER A machine that uses a multi-point cutting tool to shape
and finish either the interior of a hole or the surface of a workpiece. Broaching machines
remove large amounts of material from a workpiece.
Carbide Insert - ANSWER A cutting tool made of hard material that has multiple cutting
edges. Once a carbide insert's cutting edge is excessively worn, it can be indexed to
another edge, or the insert can be replaced.
Column-And-Knee Milling Machine - ANSWER A milling machine with a spindle that is
mounted in the column and a worktable that rests on an adjustable knee. Column-and-
knee milling machines are manual machines.
Compound Rest - ANSWER The part of the lathe that allows for angular adjustment of
the cutting tool. The compound rest holds the toolpost and is located on the carriage.
Computer Numerical Control - ANSWER CNC. The use of a computer and special
programs to carry out various manufacturing operations. Computer numerical control
can be run both lathes and mills used to machine parts.
Contours - ANSWER A curved, non-linear dimension created by a cutting process.
Contours can be created by precise tool movements in milling.
Countersinking - ANSWER The cutting of a beveled edge at the end of a hole.
Countersinking allows the head of a screw to rest level with the workpiece surface.
Cutting - ANSWER The use of single- or multi-point tools to separate metal from a
workpiece in the form of chips. Cutting processes vary based on the requirements of a
finished part.
Cutting Tool - ANSWER A device with one or more edges that is designed to cut metal.
Cutting tools are often designed to be used on a machine such as a mill or lathe.
Drill Bit - ANSWER A multi-point cutting tool used to machine round holes into
workpieces. Drill bits have spiral cutting edges and are usually mounted in drill presses.
Drill Press - ANSWER A machine tool that is used for a variety of holemaking
operations. Drill presses use rotating multi-point cutting tools.
Drilling - ANSWER The process of using a multi-point tool to penetrate the surface of a
workpiece and make a round hole. In drilling operations, the drill may rotate to cut a
stationary workpiece, or a stationary drill may be fed into a rotating workpiece.
Drive - ANSWER The main device that powers the rotation of the spindle. The drive is
located in the headstock of a lathe.
TOOLS 121 CORRECT QUESTIONS &
ANSWERS
Arbor - ANSWER An axle-like machine component attached at one end to the spindle in
a horizontal milling machine. The arbor holds and rotates the milling cutter.
Automatic Bar Machines - ANSWER A turning machine that continuously cuts a number
of parts from a piece of bar stock. Automatic bar machines are also known as bar
feeding machines.
Axis - ANSWER An imaginary straight line that passes through the center of an object.
A cylindrical workpiece typically rotates around its axis.
Band Saws - ANSWER A saw that uses a saw blade constructed from a continuous
loop or band of metal. Band saw blades are flexible, so they are able to cut gradually
curving lines in flat workpieces.
Bar Feeding Machines - ANSWER A turning machine that continuously cuts a number
of parts from a piece of bar stock. Bar feeding machines are also known as automatic
bar machines.
Bar Stock - ANSWER Raw material purchased from metal manufacturers in the form of
long pieces. Bar stock is a common form of workpiece material.
Base - ANSWER The foundation of a machine that supports all the other machine
components. Bases provide both stability and rigidity.
Bed - ANSWER The main supporting structure upon which the operating parts of a
machine are mounted and guided. Beds provide a foundation for various machine tools.
Bed-Type Milling Machine - ANSWER A type of milling machine with a large bed that
only moves along a horizontal axis. Bed-type milling machines mill large, flat
workpieces.
Boring - ANSWER The process of enlarging an existing hole with a single-point tool.
Boring is commonly performed on a lathe.
Broach - ANSWER A multi-point cutting tool made of a series of teeth that progressively
increase in size. Broaches can both remove metal and finish the surface of a workpiece
with one pass of the cutting tool.
, Broaching Machine - ANSWER A machine that uses a multi-point cutting tool to shape
and finish either the interior of a hole or the surface of a workpiece. Broaching machines
remove large amounts of material from a workpiece.
Carbide Insert - ANSWER A cutting tool made of hard material that has multiple cutting
edges. Once a carbide insert's cutting edge is excessively worn, it can be indexed to
another edge, or the insert can be replaced.
Column-And-Knee Milling Machine - ANSWER A milling machine with a spindle that is
mounted in the column and a worktable that rests on an adjustable knee. Column-and-
knee milling machines are manual machines.
Compound Rest - ANSWER The part of the lathe that allows for angular adjustment of
the cutting tool. The compound rest holds the toolpost and is located on the carriage.
Computer Numerical Control - ANSWER CNC. The use of a computer and special
programs to carry out various manufacturing operations. Computer numerical control
can be run both lathes and mills used to machine parts.
Contours - ANSWER A curved, non-linear dimension created by a cutting process.
Contours can be created by precise tool movements in milling.
Countersinking - ANSWER The cutting of a beveled edge at the end of a hole.
Countersinking allows the head of a screw to rest level with the workpiece surface.
Cutting - ANSWER The use of single- or multi-point tools to separate metal from a
workpiece in the form of chips. Cutting processes vary based on the requirements of a
finished part.
Cutting Tool - ANSWER A device with one or more edges that is designed to cut metal.
Cutting tools are often designed to be used on a machine such as a mill or lathe.
Drill Bit - ANSWER A multi-point cutting tool used to machine round holes into
workpieces. Drill bits have spiral cutting edges and are usually mounted in drill presses.
Drill Press - ANSWER A machine tool that is used for a variety of holemaking
operations. Drill presses use rotating multi-point cutting tools.
Drilling - ANSWER The process of using a multi-point tool to penetrate the surface of a
workpiece and make a round hole. In drilling operations, the drill may rotate to cut a
stationary workpiece, or a stationary drill may be fed into a rotating workpiece.
Drive - ANSWER The main device that powers the rotation of the spindle. The drive is
located in the headstock of a lathe.
