CNC FOR U
This term is used to describe the point where the Cartesian X, Y, and Z axes meet.
Origin
In addition to the drawing and the dimensions, it is another basic element found in all blueprints.
Notes
Vertical mill rotating component perpendicular to the worktable.
Spindle
Column-and-knee mill component that supports the worktable and can be adjusted vertically.
Knee
Supporting components that are two identically and precisely machined blocks set under both sides of the workpiece.
Parallels
G code that causes linear interpolation.
G01
Measurement denoted by Ø symbol.
Diameter
Component of a horizontal column and knee milling machine that supports the spindle.
Arbor
Cutting variable that has the greatest effect on tool life.
Speed
Generally is a long, narrow locating component that restricts workpiece movement with its side.
Pin
This CNC machine tool position cannot be changed by the machine operator.
Machine zero
Geometric tolerance that compares two or more cylinders to ensure that they share a center axis.
Concentricity
Machinists typically install this type of center in the tailstock for turning operations.
Live center
Workpiece material property that tends to lead to the formation of continuous chips.
Ductility
Aspect of workholding that describes its ability to create consistent versions of the same part.
Repeatability
When using the arc center method, this code locates the X axis coordinate of an arc’s center point.
I code
The measured distance between the roots on opposite sides of an OD thread.
Minor diameter
The two common standards for classifying threads.
Unified and ISO Metric
Insert shape characterized by its excellent edge strength, second only to round inserts, and the fact that it must be used at a positive lead angle.
Octagon
Type of location that allows for faster loading and unloading of parts.
Internal locating
The term used for the extra distance that a cutting tool travels prior to cutting into the workpiece.
Approach
A type of in-line inspection equipment that bounces waves off of an object to detect shape and density.
Ultrasonic system
The lowest point of a thread.
Root
Type of cast iron that contains large flakes of graphite, which give it high machinability, wear resistance, and brittleness.
Gray cast iron
Type of vise that can move its moveable jaw, rotate around a vertical axis, and tilt the workpiece.
Universal vise