04
2025
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12
What is the strength of Crown Drill Point, the "king of centering" in the drilling industry?
In the machining workshop, drilling is one of the most common and headache inducing processes. The problems of "difficult centering", "deviation" and "large vibration" of traditional Fried Dough Twists drills directly affect the processing efficiency, accuracy and tool life.
In recent years, a design known as the "Crown Drill Point" has emerged as the mainstream choice for solving high-precision drilling problems. It is not a specific brand, but an advanced geometric design concept for drill tips.
Simply put, the Crown Drill Point is a multi insert, self centering, and chip breaking drill point geometry. Its core features are:
Multi cutting edge: Transforming the traditional two main cutting edges into three or more symmetrically distributed cutting edges.
Central bulge: The center area of the drill tip resembles a raised "crown", inherently possessing excellent centering ability.
Chip separation design: Multiple cutting edges naturally divide the chips in the entire cutting area into smaller parts for easy chip removal.
From the appearance, its blade shape resembles a "crown", hence its name.
Compared with the standard Fried Dough Twists drill, the Crown drill point has the advantages of all-round:
Traditional pain points: When starting to drill with a standard drill bit, the drill tip is prone to sliding and deviation, requiring the first drilling of a center hole or the use of a drill die.
Crown solution: The central protruding "crown" can "bite" the material at the moment of contact with the workpiece, achieving direct drilling without pre drilling guide holes. This not only eliminates the process, but also ensures extremely high hole position accuracy.
Excellent chip removal and heat dissipation performance
Chip splitting effect: Multiple cutting edges divide a large continuous chip into several small chips.
Direct benefit: Chips are more easily discharged along the spiral groove of the drill bit, avoiding drill bit jamming, breakage, and heat accumulation caused by chip blockage. This makes it very suitable for processing blind holes.
Excellent hole processing quality
Less vibration: Multiple inserts are symmetrically cut, resulting in more uniform force distribution and significantly reducing radial vibration during drilling.
Result: Higher aperture accuracy, straighter hole axis, and smoother hole wall surface can be obtained, and in many cases, subsequent reaming or boring processes can be eliminated.
Higher input efficiency
Due to stable centering, smooth chip removal, and low vibration, operators can confidently use higher feed rates for drilling, significantly improving machining efficiency.
Stronger universality
A set of crown drill bits can often cover the processing of various materials (such as steel, stainless steel, cast iron, aluminum alloy, etc.), with wide adaptability, reducing the variety of tool inventory in the workshop.
