WIDIA

1
WIDIA
Selection of operating parameters - WIDIA

• Recommended data for turning ferrous materials
• Krupp Widia

2
Scope of the recommended cutting data

• rake angle5o to 10o

• rake angle is negative, the cutting speed
  lowered by 10 to 15

• approach angle -30o to 30o

In the case of cutting, relief angle 0 to 30o
- Tool life 5 - 30 minutes all the tables are
made based on tool life 15 minutes, but
conversion factors are provided for tool life 8,
30, 60 minutes (page 1.7)
3
Work Material

• According to machinability, we can divide work
  materials into groups to which different tables
  correspond
• A) Steel and cast steel
• Machinability groups 1-10
• B) Cast iron
• Machinability groups 11-18
• C) High-alloy and stainless 21 -26

Machinability The amount of wear the work
material induces in the cutting tool material
(Zv)
4
WM Factors for materials and for tools
Cutting data WM x data from table
Examples
Machine tool in particularly poor condition
WM0.8...0.95
Machine tool in particular good condition
WM1.05...1.0
Forging, rolling or casting skin
WM 0.7...0.8