Feed rate is high
Insufficient coolant is used
Cutting speed is too low
Lips of drill are of unequal length
Radial drilling machine
Deep hole drilling machine
Sensitive drilling machine
Portable drilling machine
Compression
Shearing and extrusion
Extrusion
Shearing
Cutting fluid to enter the working zone
Cutting edges to be formed
Chips to come out
Weight of drill to be reduced
Diameter and lip angle
Material and shank
Shank, material and flute size
Shank, material and diameter
