Small Hole Boring • Insert Selection Guide
The WIDIA ™ three-step insert selection system makes choosing and
applying the most productive tool easy. Tool recommendations are
based on six workpiece material groups.
1 Select the Insert Geometry:
Based on the needed depth of cut and feed rate,
choose the geometry that best matches your needs.
2 Select the Grade:
Determine your cutting conditions, and choose the proper grade.
TN7–CM1 for Steel
P
ISO 513
01
10
20
30
40
TN7 — High edge strength and wear-resistant cermet. Finishing to semi-fi nishing
of carbon, alloy, and stainless steels at medium to high speeds.
ALO
CG6
CG55
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.
CG5 CG5 — Best at low speeds. Will handle interruptions and high feed rates.
CM1 CM1 — For heavy turning and heavily interrupted cuts.
TN7
Hard
Metal
Coated
ALO–CM1 for Stainless Steel
M
10
20
30
40
ALO
C3 and C25
C2
CG6
CG55
CG5
CM1
ALO — Can withstand light interruptions. Alumina coating enables
higher cutting speeds.
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.
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.
CG5 — Best at low speeds. Will handle interruptions and high feed rates.
CM1 — For heavy turning and heavily interrupted cuts.
Hard
Metal
Coated
D32
widia.com
01
ISO 513