Rapid cooling
Reduce vibration
High tensile strength
Very difficult to machining
18.5
20
19
17
15.75 mm
15.50 mm
14.65 mm
16 mm
8.5 mm
9.75 mm
10.00 mm
10.25 mm
Feed ratio is more
Cooling is in effective
Insufficient clearance angle
Unequal length of cutting edge