Chapter 6 Machining Center Carbide Insert Fundamentals 131
Summary
Milling is the process of removing material with a multitooth rotating
cutter. There are four basic types of milling cutters. Cutters are mounted on
adapters, end mill adapters, and collet chucks. Cutters are selected based
on size, insert entry angle, insert pitch, and lead angles. Inserts are selected
on the basis of grade, shape, size, and nose radius. A standard letter and
number system is used to identify and classify cutting inserts.
Chapter Review
Answer the following questions. Write your answers on a separate sheet of paper.
1. How do you avoid the possibility of igniting coolant as a result of high temperatures
generated from cutting?
2. List the four basic types of milling cutters.
3. What type of entry angle is recommended to absorb the shock of a carbide insert entering
the machining cut?
4. What is pitch?
5. What milling cutter lead angle is best for allowing higher feed rates to be used?
6. List six shapes of inserts produced.
7. When dealing with inserts, what do the letters IC mean?
8. What do the letters CNMG mean when used to identify an insert?
9. What do the numbers 432 mean in the insert designation CNMG-432?
10. List five precautions that should be taken while preparing to machine a workpiece.
Activities
1. Obtain a sampling of the various types of inserts available based on shape and size, and
arrange a display.
2. From a part drawing, select inserts best suited to manufacture the part.
3. Use an insert troubleshooting chart that shows causes and remedies for insert problems,
and list ten problems that can arise from machining.
4. Obtain catalogs from manufacturers of cutting tool holders and inserts and develop a
library of machining data.