The core principle of selecting cemented carbide twist drill model is to match tool performance with workpiece material features. Many machining failures come from mismatches between cemented carbide twist drill model and workpiece materials. Even with reasonable cutting parameters, tool life and hole quality may fail to meet expectations. Learning the features of cemented carbide twist drill model for different materials is essential for workshop tool management.

For stainless steel machining, cemented carbide twist drill model with good thermal wear resistance and anti‑built‑up edge performance is preferred. Its flute geometry helps chip breaking and the coating can withstand high cutting temperature. Stainless steel tends to produce work hardening during drilling. Improper cemented carbide twist drill model suffers rapid tip wear and chip adhesion, which scratches finished hole surfaces.

Ductile materials such as aluminum alloy and copper alloy suit cemented carbide twist drill model with smooth flute for easy chip evacuation. Some models adopt low‑friction coating to reduce aluminum chip sticking inside flutes. Aluminum alloy drilling usually runs at high spindle speed, so edge honing of cemented carbide twist drill model shall be properly controlled to restrain burrs.

For high‑hardness materials including die steel and hardened steel, cemented carbide twist drill model made of high‑toughness substrate is recommended. Its point angle and chisel edge geometry are optimized to reduce impact load and lower chipping risk. Such cemented carbide twist drill model is generally not suitable for soft non‑ferrous metals, which may lead to low cutting efficiency.

The same cemented carbide twist drill model behaves differently on workpieces with different heat treatment status. Small‑batch trial cutting is suggested before mass production for new materials and new parts. Spindle speed, feed rate and tool wear can be recorded to confirm stable production parameters.

Kehua Cutting Technology (Wuxi) Co., Ltd. has rich experience in drilling matching for various materials. It recommends suitable cemented carbide twist drill model, supports customer trial cutting and optimizes drilling processes.