Small Hole Boring • Insert Selection Guide

3 Select the Cutting Speed: In the foldout speed and feed chart, establish your cutting speed and obtain your optimal starting conditions and range.

PSteel
MStainless Steel
KCast Iron
NNon-Ferrous
SHigh-Temp Alloys
HHardened Materials

TN7–CM1 for Cast Iron

K

ISO 513 01 10 20 30 40

Hard Metal Coated

TN7

ALO

CG6

CG55

C3 and C25

C2

CG5

CM1

TN7 — High edge strength and wear-resistant cermet.
ALO — Can withstand light interruptions. Alumina coating enables
higher cutting speeds.
CG6 — High-speed, general-purpose grade for all kinds of steel and cast iron.
CG55 — High edge strength and wear resistance. Reduces problems with
built-up edge. Superior thermal deformation resistance and
depth-of-cut notch resistance.
C3 and C25 — Good wear resistance with some toughness.
C2 — Excellent abrasion-resistance for machining cast irons,
austenitic stainless steels, non-ferrous metals, non-metals,
and most high-temperature alloys.
CG5 — Best at low speeds. Will handle interruptions and high feed rates.

CM1 — For heavy turning and heavily interrupted cuts.

C3–CM1 for High-Temperature Alloys

S

ISO 513 01 10 20 30 40

C3 and C25

C2

CG5

CM1

C3 and C25 — Good wear resistance with some toughness.

C2 Excellent abrasion resistance for machining cast irons, austenitic
stainless steels, non-ferrous metals, non-metals, and most
high-temperature alloys.
CG5 Best at low speeds. Will handle interruptions and high feed rates.

CM1 — For heavy turning and heavily interrupted cuts.

Hard Metal Coated