When roughing or finishining brake disc, the cutting parameters of CBN inserts will directly affect the cutting tool life.

Brake discs are divided into air duct discs (double discs, generally used as front discs) and solid discs (single discs) Disk, generally as the back plate). Front plate, double-layered 

structure with many circles on the circumference of wind tunnel. When the car is traveling, the air convects through the air duct to achieve the purpose of heat dissipation. The heat 

dissipation effect is much better.

Brake disc material: Generally HT250

Mechanical properties: Minimum tensile strength 250MP, hardness 209HB

Other characteristics: good strength, abrasion resistance, heat resistance, good shock absorption, better casting performance, the failure handling is required.

Such as when solid cbn inserts CNGN120712 for roughing the D=278 brake disc, the follow cutting parameters is the best:

V=650m/min、ap=2.5mm、f=0.5mm/r

Such as when cbn cutting inserts SCGN090408 for finishining the D=278 brake disc, the follow cutting parameters is the best:

V=500m/min、ap=0.1-0.2mm、f=0.25mm/r

LINKUT will introduce the optimal cutting parameter based on your detail application.