Lathe
The first thing you should do when approaching a lathe.
What is pushing the stop button?
Unlike a lathe, this machine tool holds the work piece stationary while a rotating tool removes material.
What is a mill (or milling machine)?
This is the most common unit of measurement for precision machining blueprints in the United States.
What are thousandths of an inch (decimal inches)?
This versatile tool can measure outside diameters, inside diameters, and depths of holes using its various jaws and slide rod.
What is a caliper?
This piece of equipment is the most important in any shop and must meet ANSI Z87.1 standards.
What are safety glasses?
This is the foundation of the lathe.
What is the lathe bed?
This is the most common manual milling machine found in job shops.
What is a Bridgeport?
This symbol, resembling a circle with a diagonal slash (Ø), is used to specify this circular measurement.
What is diameter?
Considered the most accurate hand-held tool, this device uses a calibrated screw to measure thickness and diameters.
What is a micrometer?
This safety procedure involves placing a physical lock and a warning tag on a power source before performing maintenance.
What is Lockout/Tagout (LOTO)?
Performing an angle cut on the lathe uses a specific component of the machine.
What is the compound?
On a vertical mill, this component houses the spindle and allows it to move up and down.
What is the quill?
A "U" shaped symbol (⌴) on a print indicates this machining operation, which enlarges the top of a hole to a flat-bottomed cylindrical shape.
What is a counterbore?
These precision-ground steel blocks, often called "Jo-Blocks," are the standard for calibrating other measuring tools.
What are gauge blocks?
$1000: This common shop hand tool should never be used to remove long, stringy chips from a rotating spindle; use a hook or pliers instead.
What are bare hands?
Used for supporting long work pieces or holding drilling tools, this component does not rotate
What is the tailstock?
These are used to raise a work piece up in a vice to ensure it clears the jaws.
What are parallels?
This V-shaped symbol (⌵) indicates an operation that creates a cone-shaped opening at the top of a hole, usually for flat-head fasteners.
What is a countersink?
A set of these thin, metal strips is used to check small clearances or gaps between mating parts.
What are feeler gauges (or thickness gauges)?
You should never leave this tool in a manual lathe chuck, as it can become a deadly projectile if the machine is turned on.
What is a chuck key?
This process uses a specialized tool to create a diamond-shaped pattern on a surface for better grip.
What is knurling?
This material is preferred over HSS for cutting tools when machining hard materials like steel.
What is carbide?
This term refers to the total amount a specific dimension is permitted to vary, often written as a +/- value.
What is tolerance?
This term describes how close repeated measurements of the same part are to each other.
What is precision (or repeatability)?
This federal agency is responsible for enforcing safety and health regulations in the American workplace.
What is OSHA (Occupational Safety and Health Administration)?