1. What is Drill Tip Length?

Drill tip length refers to the distance from the tip of a drill bit to the point where the full diameter begins. This measurement is crucial for precision drilling applications where exact depth control is required.

2. How Does the Calculator Work?

The calculator uses the drill tip length formula:

Where:

• \( d \) — Drill diameter (mm)
• \( \theta \) — Point angle (degrees)
• \( Length \) — Calculated tip length (mm)

Explanation: The formula calculates the length of the conical tip based on the drill's diameter and point angle using trigonometric principles.

3. Importance of Drill Tip Length Calculation

Details: Accurate drill tip length calculation is essential for precision machining, determining proper drilling depth, and ensuring hole accuracy in manufacturing processes.

4. Using the Calculator

Tips: Enter drill diameter in millimeters and point angle in degrees. Both values must be positive numbers, with the angle typically between 90-140 degrees for standard drill bits.

5. Frequently Asked Questions (FAQ)

Q1: Why is drill tip length important?
A: It helps determine the exact drilling depth needed to achieve a specific hole depth, accounting for the conical tip of the drill bit.

Q2: What are typical point angles for drill bits?
A: Standard point angles are 118° for general purpose, 135° for harder materials, and 90° for soft materials like wood and plastic.

Q3: Can this calculator be used for any drill bit type?
A: This formula works best for standard twist drill bits with a conical point. Specialized drill bits may require different calculations.

Q4: How accurate is this calculation?
A: The calculation provides a theoretical value based on perfect geometry. Actual measurements may vary slightly due to manufacturing tolerances.

Q5: Should I consider wear when using this calculation?
A: For precision applications, always measure actual drill tip length as wear can change the geometry over time.