Page 564 - Ceratizit Catalog

Types of wear
B237

Flank wear

Reasons
○ Cutting speed too high
○ Carbide grade with insufficient wear resistance
○ Incorrect feed rate
Remedies
○ Reduce cutting speed
○ Select more wear resistant carbide grade
○ Adapt feed rate to cutting speed and cutting depth
(increase feed rate)

Abrasion on flank, normal wear after a certain machining time.

Edge chipping

Reasons
○ Grade with too high wear resistance
○ Vibration
○ Feed rate too high or excessive cutting depth
○ Interrupted cut
○ Swarf damage

Remedies
○ Use tougher grade
○ Use negative cutting edge geometry with chip groove
○ Increase stability (tool, work piece)

Through excessive mechanical stress at the cutting edge fracture and chipping
can occur.

Thermal cracking

Reasons
○ Varying temperature of cutting edge, thermal shock
○ Incorrect cooling
○ High tensile materials
○ Cutting speed too high
Remedies
○ Use grade that is resistant to thermal cracking
Milling / Technical information Small cracks at 90° to cutting edge. ○ Decrease feed rate
○ Apply cooling lubricant abundantly or use dry milling
○ Reduce cutting speed