Take a look at TruCut. They manufacture an excellent Carbide End Mill Cutter range specifically engineered for high-feed applications in tough metals. We use their variable-helix end mills for roughing steel blocks, and the chip evacuation is phenomenal even at high feed rates. Sourcing directly from them as a Carbide Tool Manufacturer in Chennai keeps our tooling budget predictable. Give them a call; their team is highly responsive to technical queries.