1. handout 9b1 WIDIA Recommended data for turning ferrous materials Krupp Widia Selection of operating parameters - WIDIA

2. handout 9b2 Scope of the recommended cutting data rake angle=+5 o to +10 o rake angle is negative, the cutting speed lowered by 10 to 15 % approach angle -30 o to +30 o In the case of cutting, relief angle 0 to +30 o - 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. handout 9b3 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. handout 9b4 WM Factors for materials and for tools Cutting data = WM x data from table Machine tool in particularly poor condition WM=0.8...0.95 Machine tool in particular good condition WM=1.05...1.0 Examples: Forging, rolling or casting skin WM= 0.7...0.8