What is the definition of "rotary base"?
A rotating base on the bottom of the vise that can position the workpiece at a variety of angles to the X- and Y-axes.

Learn more about rotary base in the class Basics of the Manual Mill 110 below.


Manual Machining Training


Class Information
Tooling U-SME classes are offered at the beginner, intermediate, and advanced levels. The typical class consists of 12 to 25 lessons and will take approximately one hour to complete.
Class Name:Basics of the Manual Mill 110
Description:This class describes the basic components of the manual mill and also describes common workholding devices, cutting tools, and toolholders used on the mill.
Prerequisites: none
Difficulty:Beginner
Number of Lessons:14
Language:English, Spanish
 
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Class Outline
  • Objectives
  • What Is the Mill?
  • Types of Mills
  • Basic Components of the Vertical Column and Knee Milling Machine
  • The Mill Head: Speed Controls
  • The Mill Head: Feed Controls
  • Spindle Depth
  • The Mill Table
  • Toolholders
  • Drawbars
  • Cutting Tools
  • Workholding Devices
  • Common Milling Operations
  • Summary
  
Class Objectives
  • Describe the mill.
  • Identify different types of mills.
  • Identify the components of the vertical column and knee milling machine.
  • Describe the relationship of the speed controls on the mill head.
  • Describe the relationship of the feed controls on the mill head.
  • Describe the components used to adjust spindle depth.
  • Describe the components of the mill table.
  • Identify the different types of toolholders used on the mill.
  • Describe the function of a drawbar.
  • Identify the different types of cutting tools used on the mill.
  • Identify common types of workholding devices used on the mill.
  • List common milling operations.

Class Vocabulary

Vocabulary TermDefinition
adjustable boring head A type of toolholder that is used in drilling operations for holes that are larger than the largest drill bit.
angle vise A type of vise that can position the workpiece at a single angle. Angle vises can be adjusted from 0 to 90 degrees.
arbor The bar attached to the spindle in a horizontal milling machine. The arbor holds the milling cutter.
base The foundation of a machine that supports all the other machine components.
box ways A set of ways on the mill table with a square, or box-like shape. Also referred to as square ways.
carbide insert A cutting bit made of hard material that has multiple cutting edges. Carbide inserts are replaceable.
center-drilled Using a center drill to make a tapered hole in the end of a part to be supported by a center.
CNC machining center A sophisticated CNC machine that can perform mulitiple machining operations in the same setup with a variety of tools.
collet A split-sleeve device that when expanded or contracted grips a cutting tool in place on the mill.
column The vertical support, or backbone, of a milling machine.
column and knee milling machine A milling machine whose spindle is mounted in the column, and whose worktable rests on an adjustable knee.
dovetail angle An angle that resembles a joint with two interlocking pieces at right angles to each other.
dovetail cutters A type of cutting tool used to cut a dovetail angle into the workpiece.
dovetail ways A set of ways on the mill table that have a dovetail angle shape, which helps to align the sliding parts to keep them on the same track.
drawbar A long metal bar that is threaded through the mill and pulls the toolholder into a seated position. Drawbars can be manual or powered.
drill A multi-point cutting tool used to make round holes.
drill chuck A type of toolholder that holds drill bits on the mill.
drill press A machining tool that uses a drill to penetrate the surface of a workpiece and make a round hole. Drill presses can be used for a variety of hole-making operations.
end mill A cutting tool that can be used to machine grooves, slots, circular slots, etc. into workpieces.
end milling A milling operation that uses a narrower mill to create pockets and contours in a workpiece.
end-mill toolholder A type of toolholder that holds the toolbit in place with a setscrew. End-mill toolholders hold cutting tools with more rigidity than collet-type toolholders.
face mill A type of toolholder that contains multiple cutting teeth and is often used to remove large amounts of material. A face mill is essentially a toolholder and cutting tool in one.
face milling A milling operation that produces a flat surface by guiding a wider mill across the surface of the workpiece.
flute A groove on the periphery of a cutter that allows for chip flow away from the cut.
form milling A milling operation that uses a mill with a unique shape to create that shape into the workpiece.
forward-reverse switch Another name for the high-low range switch.
gibb A device used to reduce side play in the mill table as it is moved from one direction to another.
head The part of the milling machine that holds the spindle. The head also contains various speed and feed controls for the mill.
hex bolt A type of bolt that has a head with six sides.
high-low range switch The main control for the spindle that is used to direct spindle rotation either forward or reverse.
high-neutral-low lever A lever located on the right side of the mill head that is tied to the operation of the high-low range switch. If the lever is set to low, and the machine is in low range, pushing the high-low switch down moves the spindle clockwise, pushing it up moves the spindle counterclockwise.
horizontal column and knee milling machine A milling machine with a spindle that is parallel to the ground and a worktable that is positioned vertically.
jaw A component on a vise that grips and holds the workpiece in place.
knee The device that supports the mill worktable from underneath and can be adjusted vertically.
lathe A machine tool commonly used to create cylindrical forms. A lathe holds a cylindrical workpiece on one or both ends. The cutting tool is gradually passed along the surface of the rotating part.
locknut A nut located below the micrometer adjustment nut that is used to keep the top nut from moving out of position.
manual drawbar system A type of drawbar system in which the drawbar is tightened onto the tool by hand.
manual feed handwheel A handwheel located on the front of the power head that is used when very precise movements of the quill are necessary.
micrometer adjustment nut A nut located on a threaded rod that is numbered in thousandths of an inch to determine spindle depth.
mill A rotating, multi-point cutting tool that is guided along a workpiece to create flat surfaces or slots. The term also refers to a machine tool used to perform milling operations on a workpiece.
mill table The mill component that supports the workpiece and any workholding devices during machining. The mill table is precision machined for each milling machine.
milling cutter A multi-point cutting tool that has teeth around its cutting surface. Milling cutters are used on milling machines.
milling machine A machine that uses a multi-point tool to remove metal from the surface of a workpiece.
multi-point tool A cutting tool that has two or more cutting edges.
overarm The device on a horizontal milling machine that reaches over the workpiece and supports the spindle or arbor.
parallels Two metal supports that are used to position the workpiece to the desired working height in the vise.
power feed engagement crank A lever located on the right side of the mill head that operates with the quill feed selector to automatically move the quill and spin the manual feed handwheel.
power feed unit A unit that is typically attached to the mill table that automatically moves the table back and forth.
powered drawbar A type of drawbar that is typically controlled by a switch to automatically pull the toolholder in a seated position.
quick-change tooling A set of toolholders that uses a master toolholder with interchangeable toolholders. Quick-change tooling increases the speed of production.
quill The component on the mill that moves the spindle in and out of the power head.
quill feed handle A handle with a ball on the end that is used to manually move the quill.
quill feed selector The knob located on the left side of the power head that allows the operator to select automatic or manual feed for the quill. The quill feed selector operates with the power feed engagement crank to automatically move the quill.
rotary base A rotating base on the bottom of the vise that can position the workpiece at a variety of angles to the X- and Y-axes.
saddle A component of a mill that is located above the knee and below the worktable. The saddle can be adjusted in and out.
shell mill Another type of toolholder and cutting tool with multiple cutting teeth around its periphery. A shell mill is typically mounted to an arbor.
single-flute end mill A type of end mill with one flute that is used where high chip loads are to be expected.
slab milling A milling operation that uses a cylindrical mill on an axis parallel to the worktable to create a flat surface.
slotting A milling operation that cuts a narrow ridge into the surface of a workpiece.
speed change handwheel A control located on the right side of the variable speed control that allows the operator to select a specific speed within the high or low speed range.
spindle The part of the machine tool that spins or rotates. On the mill, the spindle holds a cutting tool. On the lathe, the spindle holds the workpiece.
spindle depth The amount in thousandths of an inch that the spindle enters the workpiece when machining or boring a hole.
spindle feed The rate at which the spindle enters the workpiece and removes material.
spindle speed The rate at which the machine spindle rotates. Spindle speed is typically measured in rpm.
square ways A set of ways on the mill table with a square, or box-like shape. Also referred to as box ways.
stop rods Devices located on the front of the mill table that can limit the travel of the power feed unit.
toolholder The device used to rigidly hold a cutting tool in place. Toolholders are available in standardized sizes.
T-slot An opening in the shape of the letter "T," which can accommodate a T-head bolt.
T-slot cutters A type of milling cutter that is used to machine a portion of a T-shaped slot into a workpiece.
T-slotting A milling operation that uses a T-shaped milling cutter to machine a ridge the shape of an inverted T into the surface of a workpiece.
two-flute end mill A type of end mill with two flutes that is used where fast chip removal is required.
variable speed control A speed control on the mill with a high and low speed range. Speeds can be set to any speed within the high and low speed range.
vertical column and knee milling machine A basic type of milling machine whose spindle is mounted in a column perpendicular to the floor, and whose worktable rests on an adjustable knee.
vise A workholding device with two jaws that grip and hold a workpiece in place.
ways Two parallel machined rails that keep the mill table straight and parallel to the machine's knee.
worktable The machine component that supports the workpiece and any workholding devices during machining.