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What is the definition of machining?

The process of removing metal by producing chips through the use of cutting tools.

Learn more about machining in the class "Basics of Tolerance 120" below.

Basics of Tolerance 120

Shop Essentials 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	Basics of Tolerance 120
Description	This class defines and describes the fundamentals of tolerance and its role in manufacturing. Includes an Interactive Lab.
Prerequisites	none
Difficulty	Beginner
Number of Lessons	12

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Class Outline

Class Objectives

Objectives

The Importance of Measurements

What Is Tolerance?

Tolerance and Use

Tolerance and Cost

Tolerances for Various Operations

Types of Tolerance

Advantages of Limit Dimensions

Tolerances for a Hole

Surface Tolerance

Dimensioning and Tolerance

Summary

Identify common tolerances in a manufacturing environment.

Define tolerance.

Identify how tolerance is determined.

Describe the impact of tolerance on cost.

Compare tolerances possible in machining operations.

Describe methods of describing tolerance.

Identify advantages of different tolerance methods.

Identify elements of tolerance for holes.

Describe elements of surface tolerance.

Identify the relationship between dimensions and tolerance.

Class Vocabulary

Term	Definition
abrasive	A tool consisting of hardened grains that is used to machine, grind, or finish a workpiece.
accuracy	The exactness of a measurement produced compared to the desired result.
allowance	The intentional space left between a hole and the shaft inserted into it.
bilateral tolerance	A tolerance method using an equal plus and minus deviation from the specified dimension.
blueprint	A document containing all the instructions necessary to manufacture a part. The key sections of a blueprint are the drawing, dimensions, and notes.
casting	The process of pouring a liquid material into a mold until it cools into a solid form.
clearance	The difference between the largest permissible shaft and the smallest permissible hole.
dimensioning	The process of determining the desired measurement of a feature on a part.
drilling	The process of using a multi-point tool to penetrate the surface of a workpiece and make a round hole.
flaw	An unintentional surface irregularity that may be random or repeating, such as cracks or inclusions.
grinding	The use of an abrasive to wear away at the surface of a workpiece to achieve highly accurate measurements.
interference	A tight fit designed where the smallest permissible shaft is larger than the largest permissible hole.
lapping	An abrasive process that removes the last bit of unwanted material within a very tight tolerance.
lay	The overall direction of the pattern created by the production process.
limit dimension	A tolerancing method using an absolute maximum and minimum allowable dimension.
machining	The process of removing metal by producing chips through the use of cutting tools.
milling	The use of a machine to remove metal from the surface of a workpiece with a rotating multi-point tool.
precision	The ability of a process to repeat the same accurate measurement over time.
roughness	The inherent, fine, closely-spaced irregularities created by the production process.
surface tolerance	The allowable deviation in surface texture.
tolerance	The unwanted but acceptable deviation from a desired dimension. The tighter the tolerance, the greater the cost to manufacture the part.
tolerance limit	The expected range of measurements produced by a given operation.
turning	The machining process used to make cylindrical parts. Turning is commonly performed with a lathe.
unilateral tolerance	A tolerancing method using a deviation in only one direction, either plus or minus, from the specified dimension.
waviness	The repeating irregularities with spacing greater than roughness marks that result from machine deflections and vibration.

What is the definition of machining?

The process of removing metal by producing chips through the use of cutting tools.Learn more about machining in the class "Basics of Tolerance 120" below.

Basics of Tolerance 120

Shop Essentials Department

The process of removing metal by producing chips through the use of cutting tools.

Learn more about machining in the class "Basics of Tolerance 120" below.