
Operation
Version 1.1.6 - 2021-9-17
43
Translation of original instruction
TU3008G
GB
T
U
3008G
_GB
_4.
fm
In most cases the setting angle is depending on the work piece. A setting angle of 45° to 75° is
suitable for roughing. Setting angle of 90° to 95° (no tendency to chattering) is suitable for
planing.
The corner angle serves as passing from the major cutting edge to the minor cutting edge.
Together with the infeed it determines the surface quality. The corner radius must not be
selected too large as this might result in vibrations.
4.17.1 Cutting edge geometry for turning tools
4.17.2 Types of cutting form levels
They are needed to influence the chip drain and the chip shape in order to achieve optimum
chipping conditions.
Examples of types of cutting form levels
Wedge angle
The following factors influence the
chip break when turning
Chip angle
Setting angle
Clearance angle
Corner radius
r
Clearance angle minor cutting edge
n
Cutting edge geometry
Setting angle
Cutting speed
Vc
Setting angle minor cutting edge
n
Depth of cut
ap
Point angle
Feed
f
Depth of cut
ap (mm)
Feed
f (mm/
rev)
High-speed steel
Hard metal
Clearance
angle
Chip angle
Clearance
angle
Chip angle
Steel
+5° to +7°
+5° to +6°
+5° to +11°
+5° to +7°
Cast iron
+5° to +7°
+5° to +6°
+5° to +11°
+5° to +7°
Non-ferrous metal
+5° to +7°
+6° to +12°
+5° to +11°
+5° to +12°
Aluminium alloys
+5° to +7°
+6° to +24°
+5° to +11°
+5° to +24°
Img.4-22: Cutting form level
Img.4-23: Cutting form level with fillet
b = 1.0 mm to 2.2 mm
t = 0.4 mm to 0.5 mm
b = 2.2 mm with fillet
b
t
b