Drill Tip Length Calculator
Use the following tool to calculate exact length of your drill tip. It provides unique interface that help user to easily calculate their values. Simple enter the drill diameter and the tip angle into the tool to find the length of drill tip.
The length of the drill tip is the distance from the end of the drill to where the flutes begin to form. This dimension is helpful for the user to conduct a very accurate drilling exercise, such that one can confirm whether the right drill bit is used.
How To Use Tool
| Input | Action |
|---|---|
| Drill Diameter (D) | Enter the drill diameter in inches (e.g., 0.5). |
| Tip Angle (A) | Enter the drill tip angle in degrees (e.g., 118). |
| Click Calculate | Displays the drill tip length in inches. |
Input Examples
| Calculation Type | Drill Diameter (inches) | Tip Angle (degrees) | Drill Tip Length (inches) |
|---|---|---|---|
| Basic Calculation | 0.5 | 118 | 0.144 |
| Advanced Calculation | 1.0 | 135 | 0.366 |
Calculation Formula for Drill Tip Length
Calculate drill tip length using:
| Variable | Description |
|---|---|
| DTL | Drill Tip Length (inches) |
| D | Drill Diameter (inches) |
| A | Tip Angle (degrees) |
Calculation Example
| Step | Calculation |
|---|---|
| Convert Angle to Radians |
radians |
| Calculate Tangent |
|
| Drill Tip Length |
inches |
Answer: The drill tip length is 0.144 inches.
Importance of Accurate Drill Tip Length
- Ensures drilling precision
- Selects correct drill bit for material
- Reduces risk of over-drilling
- Maximizes safety and bit life
- Improves project quality
Common Drill Diameters
- 1/16″ (0.0625 inches)
- 1/8″ (0.125 inches)
- 3/16″ (0.1875 inches)
- 1/4″ (0.25 inches)
- 3/8″ (0.375 inches)
- 1/2″ (0.5 inches)
- 5/8″ (0.625 inches)
- 3/4″ (0.75 inches)
- 1″ (1.0 inches)
Drill Point Angles
- 118°: General-purpose angle.
- 135°: Used for harder materials.
Drill Tip Length Chart
| Drill Diameter (inches) | 118° Tip Length (inches) | 135° Tip Length (inches) |
|---|---|---|
| 1/16″ (0.0625) | 0.0188 | 0.0129 |
| 1/8″ (0.125) | 0.0376 | 0.0259 |
| 1/4″ (0.25) | 0.0751 | 0.0518 |
| 3/8″ (0.375) | 0.1128 | 0.0776 |
| 1/2″ (0.5) | 0.1502 | 0.1035 |
| 3/4″ (0.75) | 0.2253 | 0.1553 |
| 1″ (1.0) | 0.3004 | 0.2071 |