There are many types of cemented carbide twist drill model. Many manufacturing enterprises only check diameter size when selecting cemented carbide twist drill model, while ignoring supporting parameters such as substrate, coating, cutting geometry and shank type. This may lead to chipping, poor chip removal and unsatisfactory hole precision after tool setup. Understanding the parameter definition of each cemented carbide twist drill model helps workshops reduce trial cutting loss and stabilize drilling production.

The code of cemented carbide twist drill model usually covers diameter, overall length, flute length and shank style. Some models are marked with substrate grade and coating type. Different coatings suit different workpiece materials. AlTiN coating works well for hard‑to‑cut materials such as stainless steel and alloy steel, while Ti‑based coating is suitable for non‑ferrous metals including aluminum alloy and copper alloy. Even the same cemented carbide twist drill model will show different cutting performance after coating replacement.

Cutting geometry is another key factor to distinguish cemented carbide twist drill model. Standard point angle models have wide applicability for ordinary shallow hole drilling. Models with thinned chisel edge bring lower feeding resistance and fit continuous drilling on automatic production lines. Cemented carbide twist drill model with internal coolant holes is designed for deep hole machining, delivering cutting fluid directly to the cutting tip to relieve thermal wear.

Machine rigidity and clamping setup restrict the application of cemented carbide twist drill model. Long‑flute and small‑diameter cemented carbide twist drill model are not recommended for machines with low rigidity, as vibration may cause tool breakage. Workpiece material, hole diameter, hole depth and machine parameters can be collected before purchasing to select proper cemented carbide twist drill model from tool suppliers.

Kehua Cutting Technology (Wuxi) Co., Ltd. provides suitable cemented carbide twist drill model according to working conditions, supports sample trial cutting and supplies drilling tool solutions for precision machining factories.