The drill point angle for a twist drill should be:

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Multiple Choice

The drill point angle for a twist drill should be:

Twist drill tip geometry uses a specific angle between the cutting edges and the drill axis. The two cutting lips meet at the tip with an included angle of about 118 degrees. The angle from the drill axis to each cutting edge is half of that, roughly 59 degrees. If the drill point angle is defined as this edge-to-axis angle, 59 degrees is the correct figure. This setup helps keep the hole centered and provides efficient cutting. The other options don’t match the standard edge-to-axis geometry: 90 degrees would create a flat-tip style unsuitable for a normal twist drill, and 30 or 45 degrees are too small to provide proper cutting geometry.

Twist drill tip geometry uses a specific angle between the cutting edges and the drill axis. The two cutting lips meet at the tip with an included angle of about 118 degrees. The angle from the drill axis to each cutting edge is half of that, roughly 59 degrees. If the drill point angle is defined as this edge-to-axis angle, 59 degrees is the correct figure. This setup helps keep the hole centered and provides efficient cutting. The other options don’t match the standard edge-to-axis geometry: 90 degrees would create a flat-tip style unsuitable for a normal twist drill, and 30 or 45 degrees are too small to provide proper cutting geometry.

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