31664 Micro Grain Solid Carbide Combined Drill Bit and Countersink, Uncoated (Bright) Finish, Round Shank, Through-Hole Flute, 60 Degrees Point, #1 Size, 4" Length (Pack of 1)

Cobra Carbide long length combined drill bit and countersink is manufactured from premium submicron level carbide grain. Ideal for chamfering. Solid carbide tools offer long tool life and faster cutting speeds than other substrates, but are more brittle and must be used with rigid toolholding systems. Round shanks allow use with a wide variety of toolholding systems. When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging. 60 degrees point angle. Tolerance: H6 - shank diameter; H7 - cut diameter.

• Solid carbide tools offer long tool life and faster cutting speeds than other substrates, but are more brittle and must be used with rigid toolholding systems
• Uncoated tools feature just the base substrate without any additional treatment or coatings and are suitable for a wide range of applications
• Round shanks allow use with a wide variety of toolholding systems
• Through-hole flute style has a single flute that passes through the cutting head to reduce vibration and chip clogging; also called "zero flute"
• For centering and countersinking on NC and CNC machines