ProductDetail

Product Overview Lihao Technology 120° countersink is made of HSS-E cobalt high speed steel, HRC 67 hardness, precision ground. It is specially designed for angled holes and countersunk holes. Single-flute structure provides smooth cutting and excellent chip evacuation. Widely used in automotive parts, mold manufacturing, aerospace and other industries. Specifications Head Diameter (mm) Shank Diameter (mm) Angle Flutes Material 8 5 120° Single HSS-E Cobalt HSS 10 6 120° Single HSS-E Cobalt HSS 12 8 120° Single HSS-E Cobalt HSS 14 8 120° Single HSS-E Cobalt HSS 16 8 120° Single HSS-E Cobalt HSS 20 10 120° Single HSS-E Cobalt HSS 25 12 120° Single HSS-E Cobalt HSS 30 12 120° Single HSS-E Cobalt HSS Product Features - High cobalt material: HSS-E cobalt high speed steel, Co 5-8%, excellent red hardness - Single-flute design: smooth cutting, low vibration, high surface finish - Precision grinding: imported CNC grinding, angle tolerance ±0.5° - Nano coating: optional TiAlN/AlCrN nano coating, 3x longer tool life - Custom made: special angles and sizes available, 7-15 days delivery Applications - Automotive parts: countersinking on engine blocks, gearbox housings - Mold manufacturing: chamfering and deburring on mold plates and bases - Aerospace: precision chamfering on titanium and high-temperature alloys - 3C electronics: precision chamfering on phone and laptop housings - General machinery: countersinking and chamfering on various metals Recommended Cutting Parameters Material Cutting Speed (m/min) Feed (mm/rev) Cooling Carbon/Alloy Steel 20-30 0.05-0.1 Emulsion Stainless Steel 10-15 0.03-0.08 Emulsion Cast Iron 25-35 0.08-0.15 Air cooling Aluminum Alloy 50-80 0.1-0.2 Emulsion FAQ Q: What is the difference between an angled countersink and a normal countersink? A: Angled countersinks are specially designed for angled holes and countersunk holes. The cutting edges are more precise to machine regular countersunk holes on inclined surfaces. Q: What materials can it machine? A: Carbon steel, alloy steel, stainless steel, cast iron, aluminum alloy, copper alloy and other common metals. Q: Do you support custom making? A: Yes. We can customize special angles and sizes according to your drawings, delivery in 7-15 days. Quality Guarantee - 100% inspection: every tool is strictly inspected before shipment - Material guarantee: genuine HSS-E cobalt high speed steel bar stock - Precision guarantee: angle tolerance ±0.5°, diameter tolerance h7 - After-sales: free replacement for quality issues, lifetime technical support