We get many people coming to us with this problem.
Often, there are many factors that may cause the cutting edge to fail.
The causes could be:
➡ Microscopic chipping of the cutting edges. There are numerous reasons for this and may include: Surface speed is too low. Feed-rate may be incorrect; Too small or too high are both possible factors.
➡ Chipbreaker geometry is always designed to suit a small range- often there’s a sweet-spot where conditions are perfect.
➡ The cutting insert hard metal (usually tungsten carbide) may be too hard and not sufficiently tough.
➡ The cutting ‘edge condition’ may be too sharp with insufficient strength.
➡ ‘Chip hammering’ or chip / swarf trapping.
➡ Incorrect centre height - this is critical especially on smaller components.
➡ There may be a problem with cutting edge build up (often called built-up-edge).
All of these points are a good start but if you’re still unsure and would like to get in contact with us to discuss further please don’t hesitate to get in touch.
