1. How to distinguish between flat bottom drills and end mills when machining countersinking? Flat bottom drills and end mills have flat angles on the top shap……

Solid carbide stepped twist drill: Product features: suitable for threaded bottom holes and chamfers of steel, cast iron, silicon aluminum gold. Scope of application: ordinary steel, quenched and tempered steel, stainless steel, cast iron, aluminum alloy, etc. Material: Titanium and superfine cemented carbide Featu……