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What is the definition of 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.

Learn more about chatter in the class "Engine Lathe Operation 225" below.

Engine Lathe Operation 225

Manual Machining Department

Class Information

Tooling U classes are offered at the beginner, intermediate, and advanced levels.
The typical class consists of 12 to 25 lessons and typically requires at least two hours of instruction time.

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	19

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Class Outline

Class Objectives

Objectives

Engine Lathe Operation

The Sample Part

Facing Principles

Sample Part: Setting up the Stock

Sample Part: Facing

Center Drilling Principles

Sample Part: Center Drilling

Drilling Principles

Sample Part: Drilling Preparation

Sample Part: Drilling with a 3/4 in. Drill

Boring Principles

Sample Part: Boring: Establishing Tool Location

Sample Part: Boring

Turning Principles

Sample Part: Turning

Parting Principles

Sample Part: Parting

Summary

List common engine lathe operations.

List the logical sequence of operations for a sample part.

Describe common principles for facing operations.

Describe common factors to consider when setting up stock in the lathe.

List the steps necessary to begin facing the sample part.

Describe common principles for center drilling.

List the steps necessary to begin center drilling the sample part.

Describe common principles for drilling.

Describe the preparation necessary to begin drilling the sample part.

List the steps necessary to drill the sample part with a ¾ in. drill.

Describe general principles for boring.

Describe how to establish tool location on the sample part during the boring operation.

List the steps necessary to begin boring the sample part.

Describe common principles for turning.

List the steps necessary to begin turning the sample part.

Describe common principles for parting.

List the steps necessary to begin parting the sample part.

Class Vocabulary

Term	Definition
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.
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.
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.
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 operations performed on the inner surface of a workpiece.
magnetic base	A device attached to the back of a dial indicator that is mounted either in front or back of the carriage.
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.
outer-diameter operations	Cutting operations performed on the outer surface of a workpiece.
parting	Also called cutoff, a shearing 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.
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.
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.

What is the definition of 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.Learn more about chatter in the class "Engine Lathe Operation 225" below.

Engine Lathe Operation 225

Manual Machining Department

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.

Learn more about chatter in the class "Engine Lathe Operation 225" below.