What is the definition of "tooth rake angle"?
The angle formed by the tooth face and a line perpendicular to the back of the blade. Positive rake angles increase the tilt of the tooth face.

Learn more about tooth rake angle in the class Sawing Fundamentals 155 below.


Metal Cutting Training


Class Information
Tooling U 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:Sawing Fundamentals 155
Description:This class identifies the main types of sawing and introduces basic terminology for saw blade types and materials.
Prerequisites: none
Difficulty:Beginner
Number of Lessons:17
Language:English, Spanish

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Below are all the competencies and job programs that contain the class Sawing Fundamentals 155. 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.

Click on any title to view its details.

Class Outline
  • Objectives
  • What Is Sawing?
  • Sawing Applications
  • Types of Sawing
  • Hacksawing and Circular Sawing
  • Band Sawing and Friction Sawing
  • Blade Terminology
  • Tooth Terminology
  • Tooth Geometry
  • Tooth Forms
  • Tooth Sets
  • Saw Blade Characteristics
  • Carbon Blades
  • Bi-Metal Blades
  • Carbide Blades
  • Saw Blade Selection
  • Summary
  
Class Objectives
  • Describe the basic sawing process.
  • List the uses of sawing.
  • Name the major types of sawing.
  • Define hacksawing.
  • Define circular sawing.
  • Define band sawing.
  • Define friction sawing.
  • Name the parts of a saw blade.
  • Name the parts of a saw blade tooth.
  • Describe the parts of a tooth that determine its shape.
  • Explain what determines tooth form.
  • Explain the purposes of tooth set.
  • Describe the properties needed for saw blade materials.
  • Name some properties of carbon blades.
  • Describe the construction of bi-metal blades.
  • Describe the construction of carbide blades.
  • Describe factors that impact saw blade selection.

Class Vocabulary

Vocabulary TermDefinition
alternate A tooth set that has an alternating, left-right sequence.
back The straight portion of a band saw blade that is opposite the tooth edge.
band saw A saw that uses a saw blade constructed from a continuous loop or band of metal.
band sawing The use of a flexible saw blade constructed from a continuous loop or band of metal.
band strength The blade's ability to resist deflection. Also known as beam strength, it is dependent on the blade's width and thickness.
beam strength The blade's ability to resist deflection. Also known as band strength, it is dependent on the blade's width and thickness.
bi-metal blade A band saw blade made from two pieces of alloy steel that are welded together.
carbide blade A band saw blade that has very hard, carbide material welded to the saw blade tooth tips and then ground into shape.
carbon steel blade A band saw blade made out of a single piece of steel.
circular sawing The use of a round saw blade with teeth around its perimeter.
cold sawing Another term for a circular sawing, which uses a round blade with teeth around its perimeter.
contouring band saw A type of band saw equipped with a table that can tilt to cut irregular shapes.
drive wheel The portion of a band saw's pulley-like drive system that propels the blade forward.
electron beam welding A metal joining process that uses a narrow stream of electrons to produce a highly concentrated heat source.
friction A saw blade made with one piece of carbon steel used at high speeds to soften metal for removal.
friction sawing Usually a type of band sawing that uses high speed to generate heat to soften the metal in front of the blade.
gage The side-to-side thickness of a band saw blade.
gullet The curved area between two band saw teeth into which the chip curls.
gullet depth The distance from the tooth tip to the bottom of the gullet.
hacksawing The use of a long blade mounted in a bow-shaped frame. Cutting takes place using a reciprocating, or back-and-forth, motion.
hard edge, flexible back A saw blade made with one piece of carbon steel with a tooth edge that has been heat-treated for hardness.
hard edge, hard back A saw blade made with one piece of heat-hardened carbon steel. Its hardness allows it to withstand heavier feed pressures.
hardness A material's resistance to penetration and wear.
high-speed steel A particular grade of steel that offers improved hardness and wear resistance. High-speed steel is often used to make various cutting tools.
hook A tooth form that has evenly spaced teeth, wide gullets, and a positive rake angle.
idler wheel In band sawing, it is the unpowered half of the pulley-like system that turns the blade. Its primary purpose is to guide the blade.
kerf The width of the slot made by a band saw as it cuts.
machinability The relative ease with which a metal can be shaped by various cutting processes.
raker A tooth set that has a uniform set angle and a three tooth set sequence of left, right, and straight.
sawing A basic, chip-producing cutting process that uses a blade set with a series of teeth on its edge to cut a narrow opening in a workpiece. Sawing may be used to produce slots or grooves or to separate the workpiece into two pieces.
set The side-to-side bending of band saw teeth. Tooth set is used to widen the cut and prevent pinching of the saw blade.
spring steel alloy A type of hardened steel that has both hardness and yield strength.
standard A tooth form that has evenly spaced teeth, deep gullets, and a zero-degree rake angle.
tip The point of the saw blade tooth that digs in and cuts the workpiece.
tooth back The rear side of a saw blade tooth facing away from the direction of the cut.
tooth back clearance angle The angle that measures the amount of space, or clearance, between the tooth back and the workpiece.
tooth face The front side of a saw blade tooth facing toward the direction of the cut.
tooth form The shape and geometry of a tooth.
tooth pitch The distance between one tooth tip and the next.
tooth rake angle The angle formed by the tooth face and a line perpendicular to the back of the blade. Positive rake angles increase the tilt of the tooth face.
tooth set The side-to-side bending of teeth. Tooth set is used to widen the cut and prevent pinching of the blade.
variable positive A tooth form that has variable tooth spacing, standard tooth forms, varying gullet depth, and a zero-degree rake angle.
wavy A tooth set that has groups of teeth set on one side and then the other.
width In band sawing, the distance from the tip of the tooth to the back of the blade.