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OVERALL LENGTH
CUTTING
ANGLE
BODY
DIAMETER
MINIMUM CUTTING
DIAMETER
BODY DIAMETER
CUTTING
ANGLE
MINIMUM CUTTING
DIAMETER
BODY DIAMETER
OVERALL LENGTH
COUNTERSINKS
COUNTERSINKS NOMENCLATURE
THE CORRECT USE OF COUNTERSINKS
A General Guide
Countersinks are normally used to produce a 60° or 90° chamfer
recess which accommodates the corresponding 60° or 90° screw
head. They are available in straight or Morse Taper Shank.
Speeds and Feeds
The speeds and feeds for countersinks are the same as those for
drills (see page 11) and are based on the diameter midway
between the largest and smallest diameter of the countersink.
RE-SHARPENING
The axial relief is critical to the performance of the countersink and
should not be altered. When re-sharpening, grind only the flute face.
