Bordo HSS Black Stub Drill Bit Diameter (inch):21/64 ▲ Size (W x H):

▲  Size (W x H): 225 x 300 mm

◆Drilling capacity 20 to 32mm by model

hatches and access panels

◆ Do not exceed maximum safe speed of 80m/s

Bordo HSS Black Stub Drill Bit Diameter (inch):21/64 ▲ Size (W x H):M2 HSS, black oxide finish Short series geometry for maximum rigidity and accuracy 118 split point for fast starting without centre punching Stub drills (screw machine twist drills) have a shorter overall length than Twist drills for maximum rigidity and longer tool life. Black Finish Stub Drills (also called blue finish) achieve their distinctive colour by steam tempering, a thermal process resulting in a porous tool coating. They are designed