Engine Lathe Operation 225

Manual Machining Training

Class Information

ToolingU.com 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:	Engine Lathe Operation 225
Description:	This class guides you through the machining of a cylindrical part using inner- and outer-diameter cutting operations as well as explains general principles surrounding each operation.
Prerequisites:	150115 150205
Difficulty:	Intermediate
Number of Lessons:	23
Language:	English, Spanish, Chinese

Below are all the competencies and job programs that contain the class Engine Lathe Operation 225. Job programs are our traditional class lists organized according to common job functions. Competencies are our latest job-specific curricula that help tie online learning to practical, hands-on tasks.

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Competencies
Maintenance Machinist Maintenance Mechanic Manual Lathe Operator

Class Outline

Objectives
Engine Lathe Operation
Facing Principles
Center Drilling Principles
Drilling Principles
Boring Principles
Turning Principles
Turning Principles: Offset
Turning Principles: Knurling
Threading Principles
Parting Principles
Making a Sample Part
Sample Part: Setting Up the Stock
Sample Part: Facing
Sample Part: Center Drilling
Sample Part: Drilling Preparation
Sample Part: Drilling with a 3/4 Inch Drill
Sample Part: Boring: Establishing Tool Location
Sample Part: Boring
Sample Part: Turning
Sample Part: Adding an Optional Knurl
Sample Part: Parting
Summary

Class Objectives

List common engine lathe operations.
Describe common principles for facing operations.
Describe common principles for center drilling.
Describe common principles for drilling.
Describe common principles for boring.
Describe common principles for turning.
Describe common principles for offset turning.
Describe common principles for knurling.
Describe common principles for threading.
Describe common pricniples for parting.
List the logical sequence of operations for a sample part.
Describe common factors to consider when setting up stock in the lathe.
List the steps necessary to begin facing the sample part.
List the steps necessary to begin center drilling the sample part.
Describe the preparation necessary to begin drilling the sample part.
List the steps necessary to drill the sample part using a 3/4 inch drill.
Describe how to establish tool location on the sample part during the boring operation.
List the steps necessary to begin boring the sample part.
List the steps necessary to begin turning the sample part.
List the steps necessary to begin knurling the sample part.
List the steps necessary to begin parting the sample part.

Class Vocabulary
boring		The process of using a single-point tool to enlarge a preexisting hole.
boring tool		A long bar used to position a single-point tool for boring operations. Boring is used to enlarge a preexisting hole and ensure that it is concentric to the part's centerline.
caliper		A measuring instrument with two pairs of jaws on one end and a long beam containing a marked scale of unit divisions. One pair of jaws measures external features; the other pair measures internal features.
center drilling		A process in which a rigid drill precisely locates a hole in the center of a workpiece. The purpose of center drilling is to establish a true centerline diameter.
chasing		Another term for "threading" on an engine lathe.
chatter		The development of surface imperfections on the workpiece caused by vibrations of the cutting tool. Chatter occurs if the machine does not have a sufficient rigidity or if the cutting tool is applied in an incorrect manner.
chip load		The thickness of the chips that come off the part during a cutting operation.
cross-slide		The device supported by the carriage that positions the turret toward and away from the workpiece.
dial indicator		A measuring device used to indicate linear movement. A dial indicator with a magnetic base is an efficient way to measure the distance between the carriage and headstock when cutting parts to exact sizes.
drill chuck		A device mounted in the tailstock of a manual lathe or in a manual drill that has jaws and a collar that are tightened to grip and hold a drill bit.
drilling		A process in which the workpiece is held stationary, while a rotating cutter (the drill) makes a round hole into the workpiece to a certain depth.
engine 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.
external threads		Threading that has been cut in the outer diameter of a workpiece.
facing		An operation performed on a lathe that feeds a single-point tool into the end of a cylindrical workpiece to create a flat surface.
flex		The amount that a part bends due to pressure from the cutting tool.
inner-diameter operations		Cutting or turning operations performed on the inner surface of a cylindrical workpiece.
internal threads		Threading that has been cut in the inner diameter of a hole in a workpiece.
ISO threads		Metric threading that conforms to the specifications of the International Organization for Standardization.
knurling		An outer diameter turning operation that displaces material rather than cutting, resulting in a slightly increased workpiece diameter. The result is a textured, rough pattern that has been embedded into the part's surface.
magnetic base		A device attached to the back of a dial indicator that is mounted either in front or back of the carriage.
micrometer		A measuring device that consists of a fixed anvil and movable spindle, usually with a digital readout or Vernier scale accurate to 0.0005 inch.
Morse taper		A hole in the sleeve of the tailstock that narrows to a point and holds tools or a center. A Morse taper allows the tool to lock in place and be easily removed.
offset turning		Machining on a lathe during which the workpiece is not in continuous alignment with the spindle centerline axis. Examples include turing tapers or irregular-shaped objects such as a camshaft.
outer-diameter operations		Cutting operations performed on the outer surface of a cylindrical workpiece.
parting		Also called cutoff, a cutting operation that separates a finished part from bar stock.
pin gage		A type of go-no go gage that determines whether the internal features of a part are within specified limits.
pitch		The distance from one thread groove to the next measured from crest to crest. For inch-based threads, pitch is expressed as "1" over the number of threads per inch. For metric threads, pitch is expressed in millimeters.
reaming		The process of using a cutting tool with straight cutting edges to enlarge or smooth holes that have been previously drilled.
single-point tool		A cutting tool that has a single cutting edge. Generally, single-point tools remain in constant contact with the part surface during operation.
tapping		The process of cutting internal threads in a workpiece with a multi-point tool.
telescope gage		A measuring instrument with a spring-loaded device used to check the inner diameter of a part. Telescope gages are then measured with a micrometer to get the proper value.
threading		The process used to machine a long, spiraling ridge down the outer or inner surface of a workpiece.
turning		An operation performed on a lathe that feeds a cutting tool along the length of a cylindrical part to reduce its diameter.
unified threads		A screw thread standard measured in inches that conforms to specifications of ASME/ANSI.
walk off		The tendency of a drill to wander off-center of the intended hole at the beginning of the drilling operation. Walk off is solved by center drilling prior to the drilling operation.