End Mill, 5pcs M3-M8 4 Flutes HSS-AL Countersink Slot Drill Bits HRC6568° Countersink Metal Countersink Drill Bit for Copper, Aluminum, Steel, Cast Iron

Description:
The countersink cutter is a special tool specially used to cut such a hole allows the head of a bolt or screw. This type of cutting hole and bottom with high alignment accuracy. Due to its high production efficiency, it is commonly used in machining.

Features:
Cutters are made of high speed steel, usually assembled on a milling machine.

Suitable for milling copper, aluminum, steel, cast iron, etc. High toughness, abrasion resistance, high speed cutting for high hardness. Processing can directly or fine processing to the heat treatment mold. Reduces tool change times, improves the movement efficiency of machine actuators, and saves time in mold making.
Specifications:
Material: HSS-AL ultra-hard high speed steel
Hardness: HRC65~68°
Size: (Boot * Blade diameter * Shank diameter * Total length)
M3 = 3.2 * 5.9 * 6 * 45mm
M4 = 4.2 * 7.4 * 6 * 48mm
M5 = 5.2 *8.9*6*51mm
M6 = 6.2 * 10.4 * 8 * 58mm
M8 = 8.2 * 13.4 * 12 * 67mm
Weight: about 128g
Package includes:
1 set (5pcs) x countersink countersink cutters
Note:
1. Please allow 1-2mm error due to manual measurement. Thank you for your understanding.
2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.