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What is the definition of oxidation?

Deposits that form on the surface of a workpiece when grinding heat and/or pressures combine with fluids to create a chemical reaction.
Learn more about oxidation in the class "Grinding Variables 200" below.

Grinding Variables 200

Abrasives 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:	Grinding Variables 200
Description:	This class identifies the most common variables that occur during grinding, with an emphasis on speeds and feeds. Includes an Interactive Lab.
Prerequisites:	250110 250120
Difficulty:	Intermediate
Number of Lessons:	13
Language:	English, Spanish

Below are all the competencies and job programs that contain the class Grinding Variables 200. 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
Centerless Grinder Operator Surface Grinder Operator

Class Outline
Objectives Managing Grinding Variables Material Removal and Surface Finish G Ratio Feed Infeed Speed vs. Feed Wheel Speed Wheel Behavior Heat Grinding Fluid Workpiece Material Characteristics Summary

Class Objectives

List examples of common grinding variables.
Describe the balance between material removal and surface finish.
Define G ratio.
Identify the different types of feed.
Explain the relationship between infeed and the arc of cut.
Distinguish between speed and feed.
Understand the limitations of changing wheel speeds.
Explain how operational changes can affect wheel behavior.
Describe the negative results heat can produce.
Identify the purposes of grinding fluid.
Explain how workpiece material characteristics influence grinding.

Class Vocabulary
arc of cut		The area of contact between the wheel and the workpiece. Also called the cutting zone.
chemical resistance		The ability to resist chemical changes. Chemically resistant materials do not react with abrasives or their bonds.
creep feed grinding		A grinding method in which the depth of cut is increased while the feed rate is decreased compared with normal grinding practices. It is used for large amounts of material removal.
cross feed		The lateral feed of the grinding wheel or table.
cutting zone		The area of contact between the wheel and the workpiece. Also called the arc of cut.
feed		The rate of movement of a workpiece, table, wheelhead or other grinding component. Feeds often involve linear movement from one point to another and are measured in inches per minute.
finish passes		Movement of a grinding wheel across a workpiece that improves surface finish with minimal removal of material.
G ratio		Cubic volume of stock removed divided by the cubic volume of wheel wear. In conventional grinding, the ratio ranges from 20:1 to 80:1.
glazing		The unwanted formation of a smooth surface on a grinding wheel. Glazing occurs when the heat from grinding reacts with a loaded wheel.
grinding		The use of an abrasive to wear away at the surface of a workpiece and change its shape.
grinding fluid		A liquid used during grinding to clean, cool, and lubricate the site.
horsepower		A unit of power used to describe machine strength. One horsepower equals 746 watts.
inches per minute		The number of linear inches that a component travels in one minute. Inches per minute (ipm) is a measurement of feed.
infeed		The feed of the grinding wheel into the workpiece.
oxidation		Deposits that form on the surface of a workpiece when grinding heat and/or pressures combine with fluids to create a chemical reaction.
regulating wheel		A wheel, usually made of plastic or rubber bond, used during centerless grinding to rotate the workpiece and pull it through the operation.
revolutions per minute		The number of times a component rotates 360 degrees, or in a complete circle, in one minute. Revolutions per minute (rpm) is a measurement of speed.
rotary table		A rotating, cylindrical surface on which the workpiece rests during grinding.
rough passes		Movement of a grinding wheel across a workpiece that removes material without regard to surface finish.
speed		The rate of rotational movement of the grinding wheel, rotary table, or regulating wheel. Speeds are measured in revolutions per minute or surface feet per minute.
surface feet per minute		The number of linear feet that a location on a rotating component travels in one minute. Though surface feet per minute (sfm or fpm) represents a linear distance, it is a measurement of speed.
through feed		The feed of a workpiece as it travels through an operation. Often used to describe workpiece motion in centerless grinding.
tolerance		The unwanted but acceptable deviation from the desired dimension.
wheel head		The part of the grinding machine on which the wheel is mounted.
work feed		The feed of the workpiece past the grinding wheel.