solid cbn inserts processing brake dicsc with BN-K20 and BN-S30

solid cbn inserts processing brake dicsc with BN-K20 and BN-S30 The main material of brake disc is the grey cast iron, which hardness is about HB170-220 and usually expressed by Brinell hardness(HB). Gray cast iron brake discs are easy to process, we usually use the conventional carbide cutting tools. But because the brake disc itself profit reducing and the raw material price rising, profits are even less. The manufacturing enterprises are searching for the suitable insert