1. What is Countersink Depth?

Countersink depth is the vertical depth of a conical hole cut into a material to allow the head of a screw or bolt to sit flush with or below the surface. It's an important measurement in machining and woodworking.

2. How Does the Calculator Work?

The calculator uses the countersink depth formula:

Where:

• \( Diameter \) — The diameter of the countersink (in inches)
• \( Angle \) — The included angle of the countersink (in degrees)
• \( \tan \) — The tangent trigonometric function

Explanation: The formula calculates the vertical depth based on the diameter of the hole and the angle of the countersink tool.

3. Importance of Countersink Depth Calculation

Details: Proper countersink depth ensures screw heads sit flush with the material surface, prevents splitting in wood, and provides a professional finish in metalwork.

4. Using the Calculator

Tips: Enter the diameter in inches and the countersink angle in degrees (common angles are 82°, 90°, or 100°). Both values must be positive numbers, with angle between 0° and 180°.

5. Frequently Asked Questions (FAQ)

Q1: What are common countersink angles?
A: Common angles are 60°, 82°, 90°, 100°, and 120°. The 82° is standard for flat head screws in the US.

Q2: How precise should my measurements be?
A: For most applications, measurements to 0.001 inches are sufficient, but precision work may require greater accuracy.

Q3: Can I use this for metric measurements?
A: Yes, but you'll need to convert the result from inches to millimeters (1 inch = 25.4 mm).

Q4: Why does angle affect depth?
A: A steeper angle (smaller number) will create a deeper hole for the same diameter, while a shallower angle creates a more gradual taper.

Q5: What if my countersink tool has multiple angles?
A: Use the primary angle of the cutting surface that matches your screw head angle.