Page 90 - Carboloy Catalogue - English

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milling cutters
milling inserts
turning holders
turning inserts
techNICAL info
92
built-up edge
Description and cause:
Sticking of machined material on the cutting edge. Its tear-
off can cause the brittle crack of the edge, consequently
the surface quality gets worse.
Troubleshooting:
- increase the cutting speed
- increase the feed rate
- use coated grade
- no coolant
- select a more easy cutting chip breaker
flank wear
Description and cause:
Flank wear is one of the main criteria of tool life.
It appears due to friction of insert to the machined material.
It is not possible to fully eliminate it, just to reduce.
Troubleshooting:
- use more wear resistant grade
- reduce the cutting speed
- increase the feed rate
(if it is under 0,1 mm.rev
-1
)
- use coolant or increase the intensity of cooling
cratering
Description and cause:
Cratering appears usually on inserts with plain face.
Troubleshooting:
- use more wear resistant grade
- reduce the cutting speed
- use coolant or increase the intensity of cooling
- reduce the feed rate
OXIDATION GROOVE ON THE MINOR EDGE
Description and cause:
Themain criterionwhich limits the tool life. It usually appears
at turning. A combination of oxidation groove and cratering
causes worse roughness of the machined surface.
Troubleshooting:
- if possible use Al
2
O
3
coated inserts
- use coolant or increase the intensity of cooling
- reduce the cutting speed
wear type of turning inserts
turning