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DIHART ® Technical Data<br />
Types of Tool Wear<br />
Flank wear<br />
Reduce cutting speed or use a cutting material or coating with higher<br />
abrasion resistance.<br />
1<br />
2<br />
Major breakage<br />
Reduce feed rate and stock allowance. Use carbide with coating<br />
instead of DST for interrupted bores.<br />
3<br />
Pitting of chip surface<br />
Reduce cutting speed or use a more positive rake angle.<br />
4<br />
Edge wear<br />
Increase cutting speed or use a more positive rake angle.<br />
5<br />
Notch wear<br />
Reduce cutting speed or use a cutting material or coating with higher<br />
abrasion resistance.<br />
6<br />
7<br />
Fatigue wear<br />
Reduce feed rate, increase stability of the reamer.<br />
8<br />
Build-up on chip surface<br />
Use positive cutting geometry, increase coolant concentration, reduce<br />
cutting speed vc for uncoated carbide cutting material, increase for<br />
DST and coated cutting material.<br />
9<br />
Micro cracks<br />
Use enough coolant and inner coolant supply, reduce cutting speed.<br />
105
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