want a dent angle of 90o how much should be the point angle?
you need to know first the number of star-tip points,,
for N star-tip points, and dent angle A:
point angle = Y - (360/N)
there are 10 places where star meets so i guess 10 points
To find the point angle required for a dent angle of 90 degrees, we need to understand what dent angle and point angle refer to in this context.
Dent angle: The dent angle, also known as included angle, is the angle between the two flanks of a drill bit or cutting tool. It represents the width of the cutting edge.
Point angle: The point angle is the angle formed by the intersection of the two cutting edges of a drill bit or cutting tool at the tip, which is responsible for initiating the cutting action.
The relationship between dent angle and point angle varies depending on the application and the type of drill bit or tool being used. Common values for point angle in various drills are 118 degrees, 135 degrees, and 90 degrees.
For a dent angle of 90 degrees, the corresponding point angle will depend on the specific drill or tool being used. To determine the required point angle, you can refer to the manufacturer's specifications or guidelines. Each drill bit or tool design has a recommended or designed point angle that ensures optimal cutting performance and tool life.
If you are using a standard twist drill bit, the most commonly used point angle is 118 degrees. However, it is always best to consult the manufacturer's guidelines or recommendations for the specific tool you are using to achieve the desired dent angle of 90 degrees.